POWER-MASTER 500 - Victor Technologies

3.03 Connecting Welding Machine
to Line Voltage
The input power should be connected to the unit through
a fused disconnect switch, or other suitable disconnecting
means furnished by the user. Access is provided in
the rear panel of the machine for the entry of the input
conductors.
DANGER:
ELECTRIC SHOCK CAN KILL.
Open the disconnect switch, or breaker, and determine
that no voltage is present, before connecting
wires between welding machine and power supply.
CAUTION:
The method of installation, conductor size, and
overcurrent protection shall conform to the requirements
of the local electrical code, the National Electrical
Code, or other national codes, as applicable.
All installation wiring and machine reconnection
shall be done by qualified persons.
Table 3-1 provides minimal information for selection of
line conductors, fuses, and the equipment grounding conductor.
This information is from the National Electrical
Code NFPA 70-1981 Edition. Install this equipment per
the latest edition, available from the National Fire Protection
Association, Batterymarch Park, Quincy, MA
02269.
Line
Volts
Rated Line
Amps
3.04 Connection Instructions
1. Remove left side panel to gain access to the input
terminal block and ground screw.
2. Connect the three phase power line to the terminal
block as shown in Figure 3-5.
3. Connect the power system safety ground to the
the screw labeled PE GROUND located on the
base of the machine near the input terminal block
as shown in Figure 3-5.
4. Replace side panel.
CUSTOMER
INPUT
LINES
Approx. Line Fuse
Size Amps Copper Line Wire Size*
FRAME GROUND
INSTALLATION 3-2 MANUAL 430429-485
L1
L2
L3
Figure 3-5 Input Terminal Block
WARNING:
Art # A-04100
Never connect the safety ground screw to one of the
three line phases. This would represent a serious electrical
shock hazard. The wiring to this machine
should be performed by a qualified person only.
Copper Gounding
Conductor Min. Size
200 88 100 No. 6 (16 mm 2 ) No. 6 (16 mm 2 )
230 82 100 No. 6 (16 mm 2 ) No. 6 (16 mm 2 )
400 43 60 No. 10 (6 mm 2 ) No. 10 (6 mm 2 )
460 39 60 No. 10 (6 mm 2 ) No. 10 (6 mm 2 )
Table 3-1 Recommended Wire and Fuse Size Table
*Conductor size shall be modified as required for line voltage and ambient temperature. Sizes listed are based on 90°
conductor insulation, designated as FEP, FEPB, RHH, and THHN.