TEST SWITCHES TEST SWITCHES - Brooks Utility

TEST 

SWITCHES 

• Standard 

• Compact 

• Mini-Compact 

• Specials 

• Roto-Test

TEST 

SWITCHES 

Contents 

Design & Construction Features .................................2 

Connection Suggestions for Test Switches...................4 

Single-Phase..........................................................4 

Network or Three-Phase ........................................4 

Three-Phase, Four Wire .........................................5 

Special Switches ........................................................6 

Back-Connected Switches ..........................................8 

Flush-Mounted Switches ............................................8 

Test Switch Covers......................................................9 

Instructions For Ordering Special Switches...............10 

Standard Switch Assemblies .....................................11 

2, 3, 4 and 6 Poles ..............................................12 

7, 8 and 9 Poles ..................................................13 

10 and 11 Poles ..................................................14 

Compact and Mini-Compact Test Switches...............15 

Compact Design & Construction Features ...........16 

Standard Compact Switch Assemblies .................17 

Semi-Flush Mounted Type ................................18 

Front-Connected Type .....................................20 

Mini-Compact Design & Construction Features ...22 

Standard Mini-Compact Switch Assemblies.........23 

Semi-Flush Mounted Type ................................24 

Front-Connected Type .....................................26 

Roto-Test Switch.......................................................28 

Roto-Test Switch Design and Construction ...............29 

Roto-Test Switch Catalog Numbers...........................32 

METER DEVICES COMPANY 

A Subsidiary of the E. J. BROOKS Company 

3359 Bruening Avenue S.W. 

P.O. Box 6382, Station B 

Canton, Ohio 44706 

Phone: (330) 455-0301 

Fax: (330) 455-1461 

Toll Free - 1 888 FOR-METER 

www.meter-devices.com 

MD-TS99-20M 

© 1999 Meter Devices Company 

Printed in U.S.A

Meter Devices Test Switches 

Meter Devices Company, founded in 

1918, has been a member of the E.J. 

Brooks family of companies since 

1981. The company has earned an 

enviable reputation among the 

world’s electric utilities as the 

premier supplier of knife type test 

switches. 

Meter Devices Company designs and 

manufacturers the finest quality and 

most complete line of test switches in 

the industry. Applications include 

meter, relay, instrument transducer 

and control system calibration, 

disconnecting, troubleshooting and 

testing. 

Meter Devices test switches 

incorporate many features for safety, 

durability, reliability and 

dependability. Test switches are rated 

at 30 amperes, 600 volts, A.C. and 

meet all applicable l.E.E.E., E.E.I., 

A.N.S.I. C12.9, and Underwriters 

Laboratories standards. 

All test switches are completely nonferrous, 

manufactured from high-conductivity 

copper and phosphor 

bronze. Test switches are furnished 

unplated as standard; however, tin or 

nickel plating for corrosion protection 

are available upon request. 

1


Design & Construction Features 

Meter Devices exclusive 

double spring, phosphor 

bronze contact jaw 

assures positive contact 

and long life 

A serrated or 

corrugated test ear 

designed to positively 

prevent test clips from 

coming off 

Molded black 

Plaslok ® or specialsized 

black 

Resiten ® bases 

provide excellent 

insulating, tracking 

and dielectric 

properties 

Molded plastic handles 

available in 12 solid 

colors, or 2-piece colored, 

have provision for wire 

i.d. Iabel 

Hinge jaw assembly 

has brass rivet in 

combination with a 

compression Belleville 

spring washer which 

maintains correctly 

adjusted jaw tension 

Wire saddle traps the wire or 

crimp connector to insure 

positive location; the terminal 

stud is long enough to accept 

multiple connections 

Bases 

Insulating bases are molded from 

tough, time-tested materials with 

excellent insulating, tracking and 

dielectric properties. Select from 

four sizes of molded-base test 

switches – 4-1/2 “, 7-1/2 “, 9-1/2 “ 

and 11-1/2” for either frontconnect, 

semi-flush, or flush 

mounting. Special Resiten ® base 

test switches complement and 

satisfy still other special 

requirements which cannot be met 

with molded-base switches. 

Handles 

Test switches are supplied as 

standard with red potential and 

black current handles. Other 

colors available: blue, brown, 

green, orange, white, yellow, red 

w/white tracer, green w/white 

tracer black w/white tracer, white 

w/black tracer. Handles include 

provisions for a wire i.d. Iabel. 

Optional Handles 

Two-Piece Colored Handles - 

Meter Devices offers ultrasonically 

welded two-piece handles as an 

option for customers who desire 

full-color mulitcolor handles on 

their switches. 

The Hinge Jaw 

Assembly assures a constant, 

uniform smooth pressure against 

the switch blade by use of a brass 

rivet that can’t come off, in 

combination with a compression 

Belleville spring washer which 

maintains correctly adjusted jaw 

tension. 

Double-Spring 

Reinforced Contacts 

Designed and developed by Meter 

Devices exclusively for Meter 

Devices products and considered, 

by far, the best contacts yet 

designed; contact jaws made of 

high conductivity phosphor bronze 

and reinforced with high 

conductivity bronze clips. The jaw 

is a spring in itself and will not 

spread, assuring perfect-contact, 

low resistance, no overheating and 

easy operation at all times. Added 

reinforcement of the phosphor 

bronze clips is positive assurance 

of long life and perfect action. 

2


The Short Circuit Clip 

Developed by Meter Devices, the 

short circuit clip eliminates the 

weakest, most troublesome part of 

most present 

day test 

switches. 

It is a make 

before-break 

type, made 

from one piece of 

phosphor bronze. It cannot get out 

of alignment; projections on the 

knife blade prevent raising the 

blade to a point where it is out of 

contact with the clip. A return 

strap completes the circuit to the 

spring jack. 

Test Jack 

Eliminates the possibility of 

accidentally opening CT 

secondaries and permits safe, easy 

measurements to be made in 

current circuits without disturbing 

permanent wiring. A dual-circuit 

test plug, such as Meter 

Devices Cat. #903-1116, is 

inserted into the test jack, 

putting the measuring 

instrument in 

series with the 

current circuit. 

Barriers 

Barriers of flame-resistant nylon 

are normally supplied between 

potential elements of all switches 

where center-to center spacing is 

less than one inch. Meter Devices’ 

barriers are higher than 

competitive brands to provide an 

extra measure of safety. 

Optional Channel Barriers 

Meter Devices 

can now supply 

channel barriers 

as an option 

replacing the 

standard snap-in 

barriers. The 

channel barriers 

are made of the 

same flame-resistant material as 

the standard snap-in barriers. The 

channel barriers also provide 

the mechanical and electrical 

advantages as the standard 

snap-in barriers. 

Wire Saddle & Terminal 

Studs 

Provided as standard for wiring test 

switches, wire saddle traps the 

wire or crimp connector to insure 

positive location and protect 

against rotation. The terminal stud 

is long enough to accept multiple 

connections at one point. For ease 

of wiring, solderless terminals are 

an option (in place of the wire 

terminal stud). 

Hexagon Nuts 

Of 3/8 “ heavy brass for fastening 

wire. 

Test Ears - Provided 

A serrated or corrugated test ear of 

ample size is designed to positively 

prevent test clips from coming off 

unless the spring tension is 

released. 

3


Connection Suggestions for Test Switches 

Single-Phase Connections 

1Ø3W with 1 C.T. 

Single Stator (2W1ø) - Form 3S Meter 

Cat. No. 104-5401 

1Ø2W with 1 P.T. & 1 C.T. 

Single Stator (2W1Ø) - Form 3S Meter 

Cat. No. 104-5401 

1Ø3W with 2 C.T.’s 

Single Stator (3W1Ø) - Form 4S Meter 

Cat. No. 106-2434 

Network or Three-Phase Connections 

4 

1Ø3W or 3W Network with 2 C.T.’s 

2 Stator Meter - Form 5S 

Cat. No. 107-1266 

3Ø3W “ ∆ “ with 2 P.T.’s & 2 C.T.’s 


Cat. No. 107-1266 

3Ø3W “ ∆ “ with 2 C.T.’s 


Cat. No. 107-1266


Three-Phase, 

Four-Wire Connections 

3Ø4W “Y” with 3 C.T.’s 

2-1/2 Stator Meter - Form 6S 

Cat. No. 109-4456 

3Ø4W “Y” with 2 P.T.’s & 3 C.T.’s 

2-1/2 Stator Meter - Form 6S 

Cat. No. 109-4456 

WIDE CT 

LINE 

WIDE CT 

WIDE CT 

LOAD 

3Ø4W “Y” or “ ∆ “ with 3 C.T.’s 

“Y” 3 Stator Meter - Form 9S 

“ ∆ “ 2 Stator Meter - Form 8S 

Cat. No. 110-54583 

3Ø4W “Y” with 3 P.T.’s & 3 C.T.’s 


Cat. No. 110-54583 

3Ø4W “Y” with 3 C.T.’s 

3 Stator Meter - Form (ALT) IOS 

Cat. No. 110-54583 

5


Special Switches 

Plated Meter 

Test Switches 

Meter Test Switches – 

Colored Handles 

Meter Test Switches 

Screw Terminals 

Meter Devices Company test 

switches are completely nonferrous 

being manufactured of 

copper and phosphor bronze. As 

such, they are furnished as 

standard unplated. If plating is 

required, tin or nickel, are 

available. To order, please suffix 

catalog number: TP - tin, NP - 

nickel, i.e., #110-54580-TP. 

Plating is a slight additional cost. 

High Voltage Test Switch 

Meter Devices test switches are 

furnished as standard with red 

potentials and black current 

handles. Other colors available 

are: blue, brown, green, orange, 

white, yellow, purple, red w/white 

tracer, green w/white tracer, black 

w/white tracer, and white w/black 

tracer. Two-piece color handles 

optional. Please specify handle 

colors from left to right when 

ordering. Red and Black are 

standard. Other color handles are 

a slight additional cost. 

Screw type terminals with a 

captive pressure pad are available 

on all front connected switches. 

No looping of wires is necessary, 

no loose parts to become 

misplaced. Simply insert the 

stripped wire beneath the pressure 

pad and tighten the terminal screw 

with a screwdriver. To order this 

type of terminal add suffix “ST” to 

the switch catalog number, i.e. 

#110-54521-ST. Price is slightly 

higher than standard terminal stud 

and nut. 

Reversed Potential 

Switches 

Meter Devices type HV High Voltage 

test switch provides a maximum 

amount of safety on services where 

2 5/8” 

277/480 volts are used. The test 

switch is made on a Resiten ® base 

material which has excellent 

4 1/4” 

insulating properties. Potentials are 

spaced further apart and are 

protected by barriers that are higher and thicker for added safety. Other 

usual utility safety procedures should continue to be followed. 

Reversed potentials are available 

on any of our standard test 

switches. They are popular with 

utilities that are seeking an added 

margin of safety for their personnel. 

Potential switch handles are 

mounted in reverse so that when 

the switch is open, the potential 

blades are not energized as would 

be the case if mounted in the conventional 

way. 

6


Small Base Test Switches 

Reactive Volt-Ampere Metering 

Switches 

Small base test switches are made on Resiten ® bases. 

They are available in any combination of currents or 

potentials, front or back connected, with handle 

ganging for single throw capability as an option. 

Switch elements are the same as on large base test 

switches. These switches are used where physical 

space is at a premium. 

Single or Double Throw 

Test Switches 

Reactive volt-ampere metering switches are a doublethrow 

type that permits testing reactive meters as 

KWH meters by shifting the potential. Commonly 

known as “heel-and-toe switches”, they are available 

in two types: “make-after-break” in which the switch 

blade has a neutral position and leaves the first jaw 

before it enters the second jaw; and “make-before 

break” in which the blade enters the second jaw 

before it leaves the first jaw. All Meter Devices heel 

and toe switches are furnished “make-after-break” 

unless specified otherwise. 

Single or double throw switches of 

any number of poles are available 

in front or back-connected styles. 

Fusing provisions for a 30 or 60 

ampere fuse is also available. 

Fused Potential 

Switches 

Potential switches are available in 

single or multiple pole arrangements 

with provisions for 

mounting a 30 or 60 ampere fuse. 

Test switches are available in a 

front or back connected style, as 

shown above. 

Fuse Blocks 

Some utilities specify that where 

potential coils, telemetering 

circuits, or communication circuits 

are connected directly to a service 

without potential transformers, 

fuses must be used in the leads. 

Equipment protection and the 

presence of relaying devices may 

make the use of fuses advisable. 

The Catalog No. 101-1375 single 

pole Fuseholder Block here 

illustrated is for mounting on the 

primary bar of 600 volt current 

transformers. 

Unmounted Test 

Switches 

Meter Devices Unmounted 

Potential Test Switches can be 

supplied to meet your special 

requirements. These switches are 

available in single pole or ganged 

as two up to six poles, single 

throw, or double throw, front or 

back-connected. Illustrations are 

back connected. 

7


Back-Connected Switches 

Any Meter Devices test switch can 

be supplied in a back-connected 

version whereby the switch is 

mounted on one side of a panel 

and the wiring connections are 

made on the opposite side. Backconnected 

switches are designated 

by the catalog number prefix and 

the suffix "B", i.e., #130-54580B. 

Back-connected switches are 

furnished as standard with 

insulated bushings for steel panel 

mounting. Switches may also be 

supplied without bushings for 

panels that are insulated. Please 

specify without bushings when 

required. 

Flush-Mounted Switches 

Meter Devices Switches can be 

supplied mounted in our Flush 

Mounting Cases with cover. These 

cases are especially suitable for 

steel panel mounting so as to 

conform to other flush mounted instruments 

such as meter relays, etc. 

The assembly consists of an 

insulated case and a semi-flush 

sealable cover of cast metal and 

Lexan ® insert. Covers are finished 

in dull-lustre black to match the 

switch board panel. 

SIMPLE INSTALLATION 

For installing Flush Mounting 

Cases and Covers, all one needs to 

do is cut a hole in the panel 

[dimensions as shown here]. Insert 

the case from the front of panel 

and attach with four screws. The 

cover fits over the opening and is 

then secured by means of two 

sealable cover studs. 

8 

DRILLING DIMENSIONS FOR 

FLUSH MOUNTING TEST 

SWITCH CASES 

Flush-Mounted Switches 

3/8” DIA. HOLE - C’SK. 3/16” DEEP 

2 REQD. 

4-13/16” 

Cat. # Width of Base A B 

115-204FM 4-1/2 5-1/16 5-5/8 

115-207FM 7-1/2 8-3/16 8-3/4 

115-209FM 9-1/2 10-1/2 11-1/16 

115-211FM 11-1/2 13-9/16 14-1/8 

B 

A 

3/16” DIA 

HOLE 

4 REQD. 

1-1/2” 

1-1/2”


Test Switch Covers 

All Meter Devices test switches can be supplied with either a clear or black 

opaque plastic cover. Plastic covers are injection molded of Lexan ® which 

is a flame-resistant, unbreakable UL-listed material. Slotted covers for front 

connect or solid covers for back connect test switches are available. To 

prevent loss of registration, Meter Devices covers are made so that all 

switch blades must be in a closed position before covers can be sealed. 

Optional Cover - Captive Hardware 

All test switch covers are available with 

the optional feature of captive hardware. 

This hardware prevents the loss of the 

cover stud nuts during testing and saves 

the time and expense of looking 

for lost cover nuts or the expense of 

replacement nuts. 

Slotted Covers for Front Connected Test Switches 

CLEAR w/ Optional Captive BLACK w/ Optional Captive Dimensions 

Cat. # Hardware Cat. # Hardware A B C 

115-204LF 115-204LFCH 115-204PF 115-204PFCH 4-5/8 3-1/2 3-1/4 

115-207LF 115-207LFCH 115-207PF 115-207PFCH 7-5/8 6-1/2 6-1/4 

115-209LF 115-209LFCH 115-209PF 115-209PFCH 9-5/8 8-1/2 8-1/4 

115-211LF 115-211LFCH 115-211PF 115-211PFCH 11-5/8 10-1/2 10-1/4 

1/4” HOLE 

1/2” 

4 1/4” 

A 

B 

3 1/16” 

Solid Covers for Back Connected Test Switches 

C 

CLEAR w/ Optional Captive BLACK w/ Optional Captive Dimensions 

Cat. # Hardware Cat. # Hardware A B 

115-204LB 115-204LBCH 115-204PB 115-204PBCH 4-5/8 3-1/2 ------- 

115-207LB 115-207LBCH 115-207PB 115-207PBCH 7-5/8 6-1/2 ------- 

115-209LB 115-209LBCH 115-209PB 115-209PBCH 9-5/8 8-1/2 ------- 

115-211LB 115-211LBCH 115-211PB 115-211PBCH 11-5/8 10-1/2 ------- 

9


Instructions For Ordering Special Switches 

Assembly #1 Assembly #26 Assembly #27 

Assembly Number 

EXAMPLE 

Test switch No. 107-54502 is made up of 

assemblies 1-1-1-26-27, these assemblies, 

found on following page, may be ordered 

to fit your requirements. 

METER DEVICES can supply test 

switches to meet practically any 

meter or relay testing requirement. 

Those standard switches which 

meet the majority of requirements 

are listed in the catalog. But if you 

need a special test switch you may 

design one to meet your own 

particular use by application of the 

information outlined below: 

1. STANDARD ASSEMBLIES: You 

may design a switch made up of 

any number, or combinations, 

of potential or current elements 

by selecting any of the 

combinations possible from the 

standard assemblies illustrated 

on page 11. These assembly 

numbers are not the catalog 

numbers but are for convenience 

of switch layout. 

2. DIMENSIONS: The minimum 

center-to-center horizontal 

dimensions between studs of 

adjoining elements is 13/16”. A 

minimum of 2-1/4” is required 

in addition to the sum of the 

dimensions between elements 

selected, as it requires 1-1/8” at 

each end of the base from 

center line to end elements, for 

mounting holes and cover 

sealing stud clearance. Barriers, 

Assembly No. 19, are provided 

on all switches where center-tocenter 

distances between 

potential and other assemblies 

are less than one inch. Barriers 

require no additional spacing. 

3. SWITCH BASES: All standard 

bases are 3-1/2” in height . 

Standard base widths are 4-1/2”, 

7-1/2”, 9-1/2” and 11-1/2” 

inches. The available working 

space is the base width less 

2-1/4”. 

Base Working Maximum No. 

Length Space of Poles 

4-5/8” 2-7/16” 4 

7-1/2” 5-5/16” 7 

9-1/2” 7-5/16” 10 

11-1/2” 9-5/16” 12 

4. SPECIAL RESITEN ® BASES: Are 

available for special spacing of 

elements or switches with more 

than twelve poles. 

10

STANDARD Test Switches 

Standard Switch Assemblies 

Assembly #1 

Single pole potential 

Assembly #4 

Solid thru bar 

Assembly #12 

Single pole current 

element right 

Assembly #13 


element left 

Assembly #14 

Double pole 

current element 

Assembly #16 

Double pole potential 

Assembly #17 

Three pole potential 

Assembly #18 

Three pole current elemtent 

Assembly #19 

Barrier 

Assembly #20 

Single pole double throw 

break before make 

Assembly #21 

#20 & 21 are double throw switches that break before 

make. Can be supplied with make before break 

Assembly #26 

Load test jack double pole 

current element right hand 

Assembly #27 

Load test jack double pole 

current element left hand 

Assembly #28 

Load test jack single 

pole current element 

Assembly #29 

Load test jack single pole 

current element right 

Assembly #30 

Load test jack single pole 

current element left 

Assembly #31 

30 Amp fuse clip 

Assembly #32 

60 Amp fuse clip 

Assembly #40 

Channel Barrier 

11


Standard Switch Assemblies - 2, 3, 4 and 6 poles 

Cat. No. 102-687 

Cat. No. 103-54539 

Cat. No. 104-5401 

Cat. No. 104-5402 

Cat. No. 104-5403 

Cat. No. 104-54504 

Cat. No. 104-54505 

Cat. No. 106-5405 

Cat. No. 104-525 

Cat. No. 106-1345 

Cat. No. 106-54518 

Cat. No. 106-527 

12 

2,3,4 and 6 poles -All heights 3 1/2” 

Catalog No. Number of Poles Base Width (Inches) Arrangement of Assemblies 

102-687 2 4-1/2 16 (with #19 center barrier) 

103-54539 3 4-1/2 28-28-28 

104-5401 4 4-1/2 1-19-1-19-26 

104-5402 4 4-1/2 1-19-26-19-1 

104-5403 4 4-1/2 1-19-1-19-27 

104-54504 4 4-1/2 1-19-27-19-1 

104-54505 4 7-1/2 1-1-27 

104-525 4 7-1/2 21-21 all handles ganged 

106-5405 6 7-1/2 1-1-12-12-29-28 

106--1345 6 7-1/2 27-27-27 

106-54518 6 7-1/2 28-13-30-13-30-13 

106-527 6 9 -1/2 21-21-21 all ganged handles


Standard Switch Assemblies - 7, 8 and 9 poles 

Cat. No. 107-54915 

Cat. No. 107-54900 

Cat. No. 107-54515 

Cat. No. 107-54502 

Cat. No. 107-54547 

Cat. No. 107-54942 

Cat. No. 107-620 

Cat. No. 107-1280 

Cat. No. 108-54931 

Cat. No. 108-1278 

Cat. No. 109-54516 

Cat. No. 109-54517 

7, 8 and 9 poles 


107-54915 7 7-1/2 1-19-26-19-1-19-27-19-1 

107-54900 7 9-1/2 1-19-26-19-1-19-26-19-1 

107-54515 7 9-1/2 1-26-1-27-1 

107-54502 7 9 1/2 1-1-1-26-27 

107-54547 7 7-1/2 1-19-1-19-1-19-26-27 

107-54942 7 9-1/2 1-19-1-19-1-26-26 

107-620 7 9-1/2 1-14-1-14-1 

107-1280 7 9-1/2 19-1-19-1-19-1-26-26 (reversed potential handles) 

108-54931 8 9-1/2 1-1-1-26-27 

108-1278 8 9-1/2 1-19-12-19-1-19-12-29-19-1-19-28-19-1 

109-54516 9 9-1/2 1-19-26-19-1-19-26-19-1-19-26 

109-54517 9 9-1/2 1-19-1-19-1-19-27-27-27 

13


Standard Switch Assemblies - 10 and 11 poles 

Cat. No. 110-54580 

Cat. No. 110-54583 

Cat. No. 110-54522 

Cat. No. 110-54943 

Cat. No. 110-54941 

Cat. No. 110-54895 

Cat. No. 110-54523 

Cat. No. 110-54924 

Cat. No. 110-1268 

Cat. No. 110-1385 

Cat. No. 110-671 

Cat. No. 111-54541 

14 

10 and 11 poles 


110-54580 10 9-1/2 1-19-26-19-1-19-26-19-1-19-26-19-1 

110-54583 10 9-1/2 1-19-1-19-1-19-1-19-26-26-26 

110-54522 10 9-1/2 1-19-1-19-1-19-4-19-27-30-13-30-13 

110-54943 10 9-1/2 1-19-1-19-1-19-4-26-26-26 

110-54941 10 9-1/2 1-19-1-19-1-19-1-19-27-30-13-30-13 

110-54895 10 9-1/2 12-19-1-19-12-19-1-19-12-19-1-19-1-19-29-29-28 

110-54523 10 9-1/2 1-19-26-19-1-19-26-19-1-19-26-19-4 

110-54924 10 9-1/2 1-19-1-19-1-19-1-27-27-27 

110-1268 10 9-1/2 1-19-1-19-1-19-4-26-26-26 

(reversed potential handles) 

110-1385 10 11-1/2 1-14-1-14-1-14-1 

110-671 10 9-1/2 1-19-1-19-1-19-4-19-14-14-14 

111-54541 11 11-1/2 1-1-1-26-27-26-27

COMPACT & MINI-COMPACT Test Switches 

Compact and Mini-Compact Test Switches 

• Compact and Versatile 

• Front and Semi-Flush 

Connected Styles 

• Safe, Durable, Rugged 

and Reliable 

• Class 1E Qualified per 

IEEE Standard 3213-1974 

Compact Test 

Switch 

Mini-Compact 

Test Switch 

Meter Devices compact and minicompact 

test switches provide 

quick and easy multicircuit testing 

of switchboard relays, meters and 

instruments by any conventional 

system. Meter Devices compact 

and mini-compact switches are 

designed for both front and back 

connected configurations. 

The rugged construction, huskiness 

and capacity of the Meter Devices 

"standard" larger size has been 

retained. Without sacrificing these 

features, the compact and minicompact 

switch is appreciably 

shorter in length to conserve and 

utilize panel space on switchboard 

installations. The mini-compact 

switch is also narrower. 

The compact test switch and the 

mini compact test switch are 

extremely flexible to the extent 

that one can be furnished to fit the 

exact need. If only a two pole 

switch is needed, then a two pole 

switch can be furnished in a two 

pole case. This same two pole 

switch can be furnished in a larger 

case, if desired. If a 24 pole switch 

is needed, it can be furnished in a 

24 pole case, or any combination 

in between. 

Any arrangement of switch 

elements can be made available. 

Standard handle color is black. 

Color coding of the handles can be 

provided as an option. Individual 

switches can be operated 

independently, replaced or 

rearranged in the field. Ganging of 

the test switch handles is also 

available. 

15

COMPACT Test Switches 

Compact Semi-Flush Mounted Test Switches 

Switch Handle 

Short Circuit Clip 

Switch Blade 

Inner Spring 

Contact Jaw 

Outer Spring 

Clip Contact Jaw 

Test Jack 

Phenolic Barrier 

Brass Rivet 

Molded 

Plastic Base 

Test Ear 

One Piece Hinge Jaw 

Screw Type Terminal 

Base 

Molded plastic which has 

excellent insulating qualities and 

non-tracking characteristics. 

Switch Blade 

Standard size special tempered 

copper. 

Switch Handle 

Standard color unless specified is 

black. Other colors available are: 

red, yellow, orange, brown, green, 

blue, white, red with white tracer, 

green with white tracer, black with 

white tracer and white with black 

tracer. 

The design of all handles will 

permit multiple ganging if desired 

and will hold identification cards. 

The handle has deep serrations for 

utmost safety and convenience, 

offering a secure grip when 

operating the blade. 

16 

Contact Jaw 

Double spring reinforced contacts 

designed and developed by Meter 

Devices Company are considered 

by far the best contacts available. 

Contact jaws are made of high 

conductivity spring bronze and are 

reinforced with high conductivity 

spring bronze clips. The jaw is a 

spring in itself and will not spread, 

thus assuring perfect contact, low 

resistance, no over-heating and 

easy operation at all times. The 

added reinforcement of the clip is 

positive assurance at long life and 

perfect action. 

Hinge Jaw 

Constant and uniform smooth 

pressure against the switch blade is 

assured by the use of a spring 

washer under the head of the 

hinge rivet, which maintains the 

correctly adjusted jaw tension. 


This clip developed by Meter 

Devices Company eliminates the 

weakest and most troublesome 

part of present day test switches. It 

is a ‘make-before-break’ type, 

made from one piece of high 

conductivity spring bronze. It 

cannot get out of alignment, while 

projections on the knife-blade 

prevent raising the blade to a point 

where it is out of contact with the 

clip. A return strap completes the 

circuit to the spring test jack. 

Test Jack 

A pair of high conductivity bronze 

springs are built into the return 

circuit of a pair of current elements 

of a Meter Devices’ test switch. 

The test jack keeps the secondary 

circuit of the transformer closed. 

When it is desired to isolate the 

current coil, Cat. #903-1116 test 

plug is used. The plug also 

provides a quick and easy method 

of connecting indicating or graphic 

meters into the circuit. A switch 

blade is also included in the 

assembly.


Test Ear 

Allows testing from front of 

switchboard by use of clips and 

test plugs. Designed to positively 

prevent clips coming off unless 

spring tension is released. 

Stud 

Screw type terminal for back 

connection with screw and cup 

washer furnished for each stud 

connection. In front connected 

applications, terminal connections 

are made with screw stud and hex 

nut. These parts are furnished with 

each switch. 

Case and Cover 

Semi-Flush case is insulated for 

use with steel panel switchboards 

and is fastened by means of four 

screws furnished with the case. The 

screws are hidden by the cover 

and walls. Lucite cover is held in 

place with knurled cover stud nuts. 

Cover studs have wire sealing 

holes. Covers for front connected 

switches are optional and are 

made of Lucite. 

Barrier 

Phenolic barriers are provided 

between all poles. 

Meter Devices can supply test 

switches to meet practically any 

meter or relay testing requirement. 

Those standard switches are listed on 

pages 18 and 20. But if you need a 

special test switch you may design 

one to meet you own special use by 

application of the information 

outlined below. These assembly 

numbers are not the catalog numbers 

but are for convenience of switch 

layout. 

Standard Compact Switch Assemblies – 

for ordering test switches not cataloged 

For those desiring to 

use an oversize case 

with the test switch 

Assembly #1c 


Assembly #4c 


Assembly #12c 


element - right 

Assembly #13c 


element - left 

Assembly #14c 

Double pole 


Assembly #15c 

Spacing Base 

Supplied between 

all poles 

Assembly #16c 


Assembly #17c 


Assembly #19c 

Barrier 

Assembly #26c 

Load test jack double 


right hand 

Assembly #27c 



left hand 

Assembly #28c 

Load test jack 



17


Semi-Flush Mounted Type Compact Test Switches 

202-1512C 203-1513C 204-1514C 205-1515C 206-1516C 

207-1517C 208-1518C 209-1519C 210-1520C 202-1521C 

203-1522C 204-1523C 205-1524C 205-1525C 206-1526C 

207-1527C 207-1528C 207-1529C 208-1530C 209-1531C 

208-1532C 204-1533C 205-1534C 206-1535C 208-1536C 

208-1537C 208-1538C 210-1539C 210-1540C 210-1541C 

207-1542C 208-1543C 210-1544C 206-1545C 208-1546C 

208-1547C 209-1548C 210-1549C 210-1550C 208-1551C 

210-1552C 210-1553C 209-2403C 204-1748C 207-1575C 

18 

Symbol Identification 

#1 – Potential Element 

#26 – Double pole current element (Short Circuit & Jack) 

#12 – Current Element (Short Circuit) 

#28 – Current Element (Load Test Jack) 

Notes: 

1. All arrangements are front view. 

2. Standard handle color is black. 

3. Special handle color coding can be furnished. 

Customer should specify colors, left to right, 

following switch part number. 

4. Handle ties can be provided. Customer should 

specify poles that are to be tied together. Pole 

numbering left to right.


1 15/16” 

“B” 

C L – C L 

COVER STUDS 

1/8” 

PANEL 

4 1/8” 

1 3/8” 

3/8” 

“C” 

2 1/4” 

4 1/4” 

1 27/32” 

1 27/32” 

Notes: 

5/32” 

REF 

1 1/8” 

1 1/8” 

“B” 

C L – C L 

“A” CUTOUT 

CUTOUT 

1/4” 

6–REQ’D 

1. Switch furnished complete with case and cover 

2. Case is fastened in place on the panel with four (4) 

screws that are furnished. 

5/32” 

REF 

3 11/16” 

CUTOUT 

Semi-Flush Mounted Type 

Compact Test Switch 

Poles Dim “A” Dim “B” Dim “C” 

2 1-5/16 1-5/8 2-1/16 

3 1-15/16 2-1/4 2-11/16 

4 2-17/32 2-27/32 3-9/32 

5 3-5/32 3-15/32 3-29/32 

6 3-3/4 4-1/16 4-1/2 

7 4-3/8 4-11/16 5-1/8 

8 4-31/32 5-9/32 5-23/32 

9 5-19/32 5-29/32 6-11/32 

10 6-3/16 6-1/2 6-15/16 

11 6-13/16 7-1/8 7-9/16 

12 7-13/32 7-23/32 8-5/32 

13 8-1/32 8-11/32 8-25/32 

14 8-5/8 8-15/16 9-3/8 

15 9-1/4 9-9/16 10 

16 9-27/32 10-5/32 10-19/32 

17 10-15/32 10-25/32 11-7/32 

18 11-1/16 11-3/8 11-13/16 

19


Front-Connected Type Compact Test Switches 

222-452 223-1453 224-1454 225-1455 226-1456 

227-1457 228-1458 229-1459 230-1460 222-1554 

222-1555 223-1556 223-1557 224-1558 224-1559 

224-1560 224-1561 224-1562 225-1563 225-1564 

226-1565 226-1566 227-1567 227-1568 227-1569 

228-1570 229-1571 230-1572 230-1573 230-1574 

232-2206 


#1 – Potential Element 

#26 – Double pole current element (Short Circuit & Jack) 

#14 – Ganged pair (Short Circuit Elements) 

Notes: 








numbering left to right. 

20


D L C L C COVER STUDS 

Front Connected Switch 

(with optional cover) 

4-1/8” 

1-5/16” 

1-5/16” 

C 

OVERALL WITH COVER 

3-3/8” 

1/4 DIA” 

3/8” C’ BORE 

MTG HOLES 

MTG HOLES 

B 

OVERALL NO COVER 

A 

3-1/2” 

Front Connected Switch 

(w/o cover) 

2-3/4” 

Front-Connected Type 

Compact Test Switches 

Poles Dim “A” Dim “B” Dim “C” Dim “D” 

2 1-1/2 -5/8 1-7/8 1-5/16 

3 2-3/32 1-7/32 2-15/32 1-7/8 

4 2-23/32 1-27/32 3-3/32 2-27/32 

5 3-5/16 2-7/16 3-11/16 3-1/8 

6 3-15/16 3-1/16 4-5/16 3-3/4 

7 4-17/32 3-21/32 4-29/32 4-11/32 

8 5-5/32 4-9/32 5-17/32 4-31/32 

9 5-3/4 4-7/8 6-1/8 5-9/16 

10 6-3/8 5-1/2 6-3/4 6-3/16 

11 6-31/32 6-3/32 7-11/32 6-25/32 

12 7-19/32 6-21/32 7-31/32 7-13/32 

13 8-3/16 7-5/16 8-9/16 7-31/32 

14 8-13/16 7-15/16 9-3/16 8-17/32 

Notes: 

1. Covers are optional on front-connected compact 

switches. Switch with cover designated by “C” suffix 

following the catalog No. of the switch. 

2. Bagged test ears and trim nuts are furnished with each 

test switch. 

3. If switch arrangement calls for current elements in 

either of the end positions, add one pole to base for 

mounting hole on that end. 


both ends, add two poles to the base size for mounting 

holes. 

5. Switches without covers use overall dimension ”A”. 

6. Switches with covers use overall dimension “C”. 

21

MINI-COMPACT Test Switches 

Mini-Compact Test Switches 

Switch Handle 

Inner Spring 

Contact Jaw 


Switch Blade 

Outer Spring 

Clip Contact Jaw 

Test Jack 

Phenolic Barrier 

Molded 

Plastic Base 

Brass Rivet 

One Piece Hinge Jaw 

Test Ear 

Screw Type Terminal 

Base 

Molded plastic which has 

excellent insulating qualities and 

non-tracking characteristics. 

Switch Blade 

Standard size special tempered 

copper. 

Switch Handle 

Standard color unless specified is 

black. Other colors available are: 

red, yellow, orange, brown, green, 

blue, white, red with white tracer, 

green with white tracer, black with 

white tracer and white with black 

tracer. The design of all handles 

will permit multiple ganging if 

desired and will hold identification 

cards. The handle has deep 

serrations for utmost safety and 

convenience, offering a secure grip 

when operating the blade. Blank 

identification stickers are available 

from stock. 

Contact Jaw 

Double spring reinforced contacts 

designed and developed by Meter 

Devices Company are considered 

by far the best contacts available. 

Contact jaws are made of high 

conductivity spring bronze and are 

reinforced with high conductivity 

spring bronze clips. The jaw is a 

spring in itself and will not spread, 

thus assuring perfect contact, low 

resistance, no overheating and 

easy operation at all times. The 

added reinforcement of the clip is 

positive assurance of long life and 

perfect action. 

Hinge Jaw 

Constant and uniform smooth 

pressure against the switch blade is 

assured by the use of a spring 

washer under the head of the 

hinge rivet, which maintains the 

correctly adjusted jaw tension. 

Barrier 

Phenolic barriers are provided 

between all poles of a switch. 


This clip developed by Meter 

Devices Company eliminates the 

weakest and most troublesome 

part of present day test switches. It 

is a 'make-before-break' type, 

made from one piece of high 

conductivity spring bronze. It 

cannot get out of alignment, while 

projections on the knife-blade 

prevent raising the blade to a point 

where it is out of contact with the 

clip. A return strap completes the 

circuit to the spring test jack. 

22


Test Jack 

A pair of high conductivity bronze 

springs are built into the return 

circuit of a pair of current elements 

of a Meter Devices test switch. The 

test jack keeps the secondary 

circuit of the transformer closed. 

When it is desired to isolate the 

current coil, Cat. #903-1116 test 

plug is used. The plug also 

provides a quick and easy method 

of connecting indicating or graphic 

meters into the circuit. A switch 

blade is also included in the 

assembly. 

Test Ear 

Allows testing from front of 

switchboard by use of clips and 

test plugs. Designed to positively 

prevent clips coming off unless 

spring tension is released. 

STUD 

Screw type terminal for back 

connection with screw and lock 

washer furnished for each stud 

connection. 

Solderless Type 

Terminals 

Will accept #14 - #10 wire. Test 

clip connections are made on the 

head of the screw. Used on Front 

Connected switches Only. 

Case and Cover 

Semi-flush case is insulated for use 

with steel panel switchboards and 

is fastened by means of four screws 

furnished with the case. The screws 

are hidden by the cover end walls. 

Lucite cover is held in place with 

rubber friction tabs. Covers for 

front connected switches are also 

Lucite. 

Standard Mini-Compact Switch Assemblies – 

for ordering test switches not cataloged 

For those desiring to 

use an oversize case 

with the test switch 

Assembly #1m 


Assembly #4m 


Assembly #12m 


element - right 

Assembly #13m 


element - left 

Assembly #14m 

Double pole 


Assembly #15m 

Spacing Base 

Supplied between 

all poles 

Assembly #16m 


Assembly #17m 


Assembly #19m 

Barrier 

Notes: 



3. Special handle color coding can be furnished. Customer should 

specify colors, left to right, following switch part number. 

4. Handle ties can be provided. Customer should specify poles that are 

to be tied together. Pole numbering left to right. 

Assembly #26m 



right hand 

Assembly #27m 



left hand 

Assembly #28m 

Load test jack 



23


Semi-Flush Mounted Mini-Compact Test Switches 

302-2070C 302-2071C 302-2072C 302-2073C 303-2074C 

303-2075C 303-2076C 304-2077C 304-2078C 304-2079C 

304-2080C 304-2081C 304-2082C 305-2083C 305-2084C 

305-2085C 305-2086C 305-2087C 306-2088C 306-2089C 

306-2090C 306-2091C 306-2092C 306-2093C 307-2094C 

307-2095C 307-2096C 307-2097C 307-2098C 307-2099C 

307-2100C 307-2101C 308-2102C 308-2103C 308-2104C 

308-2105C 308-2106C 308-2107C 308-2108C 308-2109C 

308-2110C 308-2111C 308-2112C 308-2113C 308-2114C 

309-2115C 309-2116C 309-2117C 309-2118C 309-2119C 

24 

Note: 

For symbol 

identification, 

ordering information, 

special notes etc., 

refer to page 26. 

309-2120C 309-2121C 310-2122C 310-2123C


“B” CL 

PANEL 

SHIELD 

(EACH SIDE) 

PANEL 

3 7/16” 

OVERALL 

PANEL 

SHEILD 

COVER 

3” 

1 3/8” 

3/8” 

1 5/16” 

2 1/4” 

C 

1/8” PANEL 

1/4” 

DIA 

6 REQ’D 

1 5/16” 

1 1/8” 

2 5/8” 

CUTOUT 

1 1/8” 

1 5/16” 

Notes: 

5/32” 

REF 

“A” CUTOUT 

CUTOUT 

PANEL DRILLING PLAN 

1. Switch furnished complete with case and cover. 

2. Case is fastened in place on back of panel with four (4) 

screws that are furnished. 

3. Cover is friction fit. 

“B” C L 

3 11/16” 

5/32” 

REF 

Semi-Flush Mounted 



2 1-7/32 1-17/32 1-31/32 

3 1-25/32 2-3/32 2-17/32 

4 2-11/32 2-21/32 3-3/32 

5 2-29/32 3-7/32 3-21/32 

6 3-15/32 3-25/32 4-7/32 

7 4-1/32 4-11/32 4-25/32 

8 4-5/8 4-15/16 5-3/8 

9 5-3/16 5-1/2 5-15/16 

10 5-3/4 6-1/16 6-1/2 

11 6-5/16 6-5/8 7-1/16 

12 6-7/8 7-3/16 7-5/8 

310-2124C 310-2125C 310-2126C 310-2127C 310-2128C 

310-2129C 310-2130C 310-2131C 310-2132C 310-2133C 

310-2134C 310-2135C 310-2136C 310-2137C 311-2138C 

312-2139C 312-2140C 312-2147C 312-2148C 

Note: 

For symbol 

identification, 

ordering information, 

special notes etc., 

refer to page 26. 

25


Front-Connected Type Mini-Compact Test Switches 

322-2159 323-2160 324-2161 325-2162 326-2163 

327-2164 328-2165 329-2166 330-2167 322-2168 

322-2169 323-2170 323-2171 324-2172 324-2173 

324-2174 324-2175 324-2176 325-2177 325-2178 

326-2179 326-2180 327-2181 327-2182 327-2183 

328-2184 329-2185 330-2186 330-2187 330-2188 

331-2189 331-2190 332-2191 


#1m – Potential Element 

#12m – Current Element (Short circuit) 

#14m – Double pole current element (Pair short circuits, handles tied) 

#26m – Double pole current element (Short circuit & jack pair) 

Notes: 








numbering left to right. 

#27m– Double pole current element (Jack & short circuit pair) 

#28m – Current element (Load test jack) 

26


FRONT CONNECTED SWITCH 

(with optional cover) 

3” 

“B” 

MTG 

HOLES 

C 

OVERALL WITH COVER 

1 11/32” 1 19/32” 

2 5/8” 

1/4” DIA 

3/8” C’T 

BORE 

MTG 

HOLES 

2 3/4” 

FRONT CONNECTED SWITCH 

WITH NO COVER 

OVERALL 

NO COVER 

“A” 2 3/4” 

Notes: 

1. Covers are optional on front-connected mini-compact 

switches. Switch “WITH COVER” designated by “C” 

suffix following the part no. of the switch. 

2. If terminal connectors are solderless screw-type, wire 

range 14-10. 


either of the end positions, add one pole to base size 

for mounting hole that end. 


both of the end positions, add two poles to the base 

size for mounting holes. 

5. Switches without covers use overall dimensions “A”. 

6. Switches with covers use overall dimensions “C”. 

Front-Connected Type 



2 1-13/32 -9/16 1-31/32 

3 1-31/32 1-1/8 2-9/16 

4 2-17/32 1-11/16 3-1/8 

5 3-1/8 2-1/4 3-11/16 

6 3-11/16 2-27/32 4-1/4 

7 4-1/4 3-13/32 4-13/16 

8 4-13/16 3-31/32 5-3/8 

9 5-3/8 4-17/32 5-15/16 

10 5-15/16 5-3/32 6-1/2 

11 6-1/2 5-21/32 7-3/32 

12 7-1/16 6-7/32 7-21/32 

27

ROTO-TEST Switches 

Roto-Test Switches 

The Roto-Test Switch is the result 

of years of experience and 

research in the manufacture of 

testing devices for instruments, 

relays and meters, and it achieves 

a mechanical and electrical 

perfection never before attained in 

a device for this purpose. 

It combines safety and efficiency, 

saves time and space and 

embodies all the desired features 

for safe, speedy and dependable 

relay and meter testing. 

With the Roto-Test Switch, relays 

and meters may be tested at the 

turn of a key without 

disconnecting for service. Overcurrent 

relays may be tested in any 

one phase without disturbing the 

others, thereby providing partial 

protection during the testing 

period. The switch can be used for 

transfer of relays and meter 

circuits for quick testing without 

removing any wiring. 

28 

RATING-30 AMPERES 600 VOLTS 

MULTIPLE 

COMBINATIONS 

These switches are available in 

four, six, ten, twelve, fourteen, 

sixteen, eighteen and twenty pole 

combinations. Switches mount on 

the rear of the switchboard and the 

face plate appears on the front of 

the board. This highly efficient and 

effective installation, not only 

conserves space on the 

switchboard and matches other 

instruments and installations. 

DIVERSIFIED 

APPLICATIONS 

The Roto-Test switch can be 

applied to any type of switchboard 

and used with all standard makes 

of instruments, relays and meters. 

ABSOLUTELY SAFE 

The Roto-Test switch is the safest 

device of its kind on the market. 

Its mechanical construction is such 

that it is practically impossible for 

any parts to loosen up in operation 

and cause trouble. Perfect contact 

is maintained between blades 

and clips. 

No live parts are exposed–only the 

face plate appears on the front of 

the board. 

Heavy Textolite (Bakelite) case and 

Rotor provide positive insulation. 

Test of relays and meters is made 

from front of board on test studs 

without any connection or 

disconnection and without 

interruption of service. 

It is impossible to trip the circuit 

breakers when testing. However, 

any relay may be cut out by the 

operator should emergency 

demand it.

ROTO-TEST Switches 

Roto-Test Switch – Design and Construction 

Heavy brass terminals with 

wire holders. 

Drawn copper 

contact blades and 

blade assembly. 

Die cast rotor flange 

and bearing. 

One piece Textolite 

(Bakelite) case with 

removable top and 

bottom covers. 

Specially designed 

phosphor bronze 

contact clips. Potential 

jaws are shorter than 

current jaws so 

potential contact is 

broken before current 

contact is made. 

Textolite rotor mounted 

on square steel shaft. 

Extra strong mounting 

inserts molded in case. 

Design & Construction Features 

SIMPLE AND 

EFFICIENT 

Meter Devices Roto-Test Switch is 

extremely simple and efficient in 

design and compact in 

construction. Mechanically and 

electrically, its construction is as 

close to perfect as humanly 

possible. 

SAVES SPACE 

With numerous instruments now 

used on a single panel, space is at 

a premium. The Roto-Test Switch 

saves space, requiring only a 4"x4" 

area on the board. The Roto-Test 

Switch can be applied to any type 

of switchboard for use with any 

standard make of instruments, 

meters, relays, etc. 

SAVES TIME IN 

TESTING 

The Roto-Test Switch reduces 

testing time to a minimum. A turn 

of the key throws the switch into 

the testing position without 

disconnecting the instruments or 

meters from service. Testing is 

completed in as little as 60 

seconds. Compared to other 

methods, Meter Devices Roto-Test 

Switch operates in a fraction of the 

time. 

Operators can test many more 

applications per day. The number 

of testers required is materially 

reduced. Substantial savings in 

maintenance costs are realized. 

CASE 

One piece Textolite (Bakelite) case 

with removable top and bottom 

covers. Extra strong brass inserts 

and reinforcing ribs are molded 

into the case. Die cast rotor flange 

and bearing provide years of 

trouble free operation. Heavy brass 

terminals and wire holders are 

standard. 

CONTACT JAWS & 

BLADES 

The contact jaws are a Meter 

Devices exclusive! The doublespring, 

phosphor-bronze jaws are 

fortified with high conductivity 

phosphor bronze reinforcing clips. 

The jaw is a spring in itself and will 

not spread, assuring perfect 

contact, low resistance and no 

overheating. 

29


Roto-Test Switch 

PHOSPHOR BRONZE 

CONTACT JAWS 

The jaw is press-formed around the 

head of the stud, making it rigid, 

permanent and impossible to 

detach. Spring bronze clip is 

inserted over all. The phosphor 

bronze jaw is a spring in itself and 

will not spread, insuring perfect 

contact at all times. An extra heavy 

stud bolt is used. The design of the 

contact jaws is exclusive to Meter 

Devices. 

BLADE ASSEMBLY 

The hinge jaw is formed around 

the heavy stud bolt, locking it 

permanently in place. The blade 

pivots in the jaw on a brass rivet. A 

Belleville spring washer secures 

the blade. This method of assembly 

provides a free turning, nonbinding 

joint between blade and 

jaws. Contact blades are made of 

hard-drawn copper. Contact edges 

are chamfered, assuring perfect 

contact. 

ROTOR AND SHAFT 

Rotor is unusually tough and 

durable, made of Textolite 

(Bakelite). It is mounted on a 

square shaft to prevent any 

possibility of misalignment. 

Contains no pins to shear off and 

allow rotor to turn on the shaft. 

Rotor is mounted meshing 

perfectly with the teeth of the 

contact blade, preventing any 

possibility of working out of 

alignment. Shaft does not extend 

through rear of case, since the 

rear hub is cast in the case. 

BAKELITE OVAL 

HANDLE 

BAKELITE PISTOL- 

GRIP HANDLE 

STEEL TEST KEY 

with interlocking pin 

Catalog No. Description Type of Handle 

30 

400-400 Steel, Cadmium Plated Removable 

400-401 Bakelite, Pistol Grip Removable 

400-402 Bakelite, Oval Non-removable 

400-405 Bakelite, Pistol Grip Non-removable 

400-406 Bakelite, Oval Removable


ESCUTCHEON PLATE 

The Escutcheon Plate is of standard 

switchboard design and readily 

aligns with instrument plates of 

leading instrument manufacturers. 

Constructed of heavy pressed 

metal with counter-sunk holes to 

mount screws in a neat 

appearance. A slot in the plate 

interlocks and secures the key. It is 

impossible to remove the key until 

the switch has been restored to the 

operating position. 

5 5/8” 

4” 

END 

3 3/4” 

9/32” DIA 

4 HOLES 

1 7/8” 

CASE 

2 3/8” 

1 3/16” 

DRILLING TEMPLATE 

4 1/4” 6 1/4” 

Case is molded in one piece using 

Textolite (Bakelite). All-brass inserts 

are molded in place for optimum 

strength, both electrically and 

mechanically. Removable top and 

bottom dust-proof covers are 

interchangeable. Four-point 

suspension is provided for 

mounting with heavy brass inserts 

molded in position. No nuts are 

necessary in the switch case. 

4” 

2” 

2 3/8” 

1 3/16” 

7/8” 

MOUNTING & TESTING 

The Roto-Test Switch is 

permanently mounted on the rear 

of the board by means of heavy 

brass inserts molded into the case. 

Only five holes are required. 

All operations and tests are made 

in front of the board; there is no 

need for the tester to go to the rear 

of the board. 

Testing is made by interlocking 

key. When the switch is in the 

"Test" position, the key cannot be 

removed. 

Thus there is no possible danger 

to operator or equipment since 

there are: 

No live parts exposed 

No wrong connections 

No current transformers open 

No trip circuits open 

No loose connections 

All hazards to which an operator 

or tester is exposed when testing 

instruments or relays at the rear of 

the board are entirely eliminated. 

3 3/4” 

4 AND 6 POLE 8 AND 10 POLE 

115º 

90º 

25º 

OPERATING POSITION 

IN. 

.307 +0 .003 DIA OF SHAFT 

31


Roto-Test Switch 

32 

POTENTIAL CURRENT Approx. 

Meter Devices No. of Poles CONTACTS CONTACTS Shipping 

Catalog No.* each S.P.D.T. (Break before (Make before Weight 

make) 

break) 

401-404 4 0 4 5lbs. 

401-422 4 2 2 

401-440 4 4 0 

402-606 6 0 6 5 lbs. 

402-624 6 2 4 

402-633 6 3 3 

402-642 6 4 2 

402-660 6 6 0 

403-808 8 0 8 6 lbs. 

403-826 8 2 6 

403-844 8 4 4 

403-862 8 6 2 

403-880 8 8 0 

404-10010 10 0 10 7 lbs. 

404-1028 10 2 8 

404-1046 10 4 6 

404-1064 10 6 4 

404-1082 10 8 2 

404-10100 10 10 0 

405-12012 12 0 12 7 lbs. 

405-12210 12 2 10 

405-1248 12 4 8 

405-1266 12 6 6 

405-1284 12 8 4 

405-12102 12 10 2 

405-12120 12 12 0 

405-14014 14 0 14 8 lbs. 

405-14212 14 2 12 

405-14410 14 4 10 

405-1468 14 6 8 

405-1486 14 8 6 

405-14104 14 10 4 

405-14122 14 12 2 

405-14140 14 14 0 

405-16016 16 0 16 10lbs. 

405-16214 16 2 14 

405-16412 16 4 12 

405-16610 16 6 10 

405-1688 16 8 8 

405-16106 16 10 6 

405-16124 16 12 4 

405-16142 16 14 2 

405-16160 16 16 0 

405-18018 18 0 18 13 lbs. 

405-18216 18 2 16 

405-18414 18 4 14 

405-18612 18 6 12 

405-18810 18 8 10 

405-18108 18 10 8 

405-18126 18 12 6 

405-18144 18 14 4 

405-18162 18 16 2 

405-18180 18 18 0 

405-20020 20 0 20 15 lbs. 

405-20218 20 2 18 

405-20416 20 4 16 

405-20614 20 6 14 

405-20812 20 8 12 

405-201010 20 10 10 

405-20128 20 12 8 

405-20146 20 14 6 

405-20164 20 16 4 

405-20182 20 18 2 

405-20200 20 20 0


BROOKS UTILITY PRODUCTS GROUP 


A Subsidiary of E.J. BROOKS Company 



Phone: (330) 455-0301 

Fax: (330) 455-1461 

Toll Free – 1 888 FOR-METER 

www.meter-devices.com 

E.J. BROOKS COMPANY 

8 Microlab Road 

Livingston N.J. 07039 

Phone: (973) 597-2900 

Fax: (973) 597-2919 

Toll Free: 1 800 458-SEAL 

www.ejbrooks.com 

EKSTROM INDUSTRIES, INC. 

A Subsidiary of E.J. BROOKS Company 

23847 Industrial Park Drive 

Farmington Hills, MI 48335 

Phone: (248) 477-0250 

Fax: (248) 477-2583 

Toll Free: 1 800 532-IDEA 

www.ekstrom-metering.com 

e-mail: marketing@ekstrom-metering.com 

OTHER BROOKS OPERATING UNITS 

In 1998, the E. J. Brooks Company celebrated its 125th 

anniversary. Originally staffed by a small handful of 

employees, our company now employs over 600 

people. E. J. Brooks has grown into a manufacturing 

enterprise with 12 operating units worldwide serving 

customers in more than 60 countries. 

E.J. BROOKS 

INDUSTRIES, LTD. 

412 High Street, East 

Strathroy, Ontario N7G 1H5 

Canada 

Phone: (519) 245-5369 

Fax: (519) 245-5352 

E.J. BROOKS (EUROPE) 

LIMITED 

6, The Metro Centre, 

Bridge Road 

Orpington, Kent BR5 2BE, 

England 

Phone: (0) 1689 83 63 31 

Fax: (0) 1689 83 62 94 

BROOKS SELOS DE 

SEGURANCA DO BRASIL 

LTDA. 

Rua Timoteo, 80 - Bairro: 

Santa Ines 

CEP: 31080-040, Belo 

Horizonte 

Minas Gerais, Brasil 

Phone: 31-463-1839 

Fax: 31-463-4724 

BROOKS/TODO Seguridad 

En Espana S.A. 

C/VIC No. 26-28, 

08120 La Llagosta 

Barcelona, Spain 

Phone: 3-560-5500 

Fax: 3-560-5701 

R A N S 

U A R D 

TRANS-GUARD 

INDUSTRIES, INC. 

903 S. Wayne 

P.O. Box 367 

Angola, Indiana 46703 

Phone: (219) 665-9402 

Fax: (219) 665-5814 

ZAPPA PLASTICS. INC. 

165 Howard Street 

Phillipsburg, N.J. 08865 

Phone: (908) 454-4500 

Fax: (908) 454-4507 

WALING TOOL & DIE 

COMPANY 

23850 Freeway Park Drive 

Farmington Hills, MI 48335 

Phone: (248) 476-6680 

Fax: (248) 476-7964 

ACROMARK INDUSTRIES 

60 Locust Avenue 

P.O. Box 236 

Berkeley Heights, N.J. 07922 

Phone: (908) 464-6474 

Fax: (908) 464-0673


A Subsidiary of the E. J. BROOKS Company 

3359 Bruening Avenue S.W. 



Phone: (330) 455-0301 

Fax: (330) 455-1461 

Toll Free - 1 888 FOR-METER 

www.meter-devices.com

TEST SWITCHES TEST SWITCHES - Brooks Utility

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