Socomec UL General Catalog

UL/ CSA standards for disconnect switches
UL98 - Enclosed and dead front switches
(equivalent to CSA-C22.2 no 4)
These requirements cover enclosed or dead front Switches,
with or without provision for fuses, at 600 V or less.
These products are used as disconnecting meanswithout
restrictions ; they are heavy duty products requiring 2 inches
(50 mm) minimum of creepage distance, which gives a
maximum safety for users and installation. The short circuit
withstand of those products goes up to 200 kA.
Typical control panel
UL 98 or UL 489
Non fusible Disconnect switches
SIRCO M UL98 and SIRCO UL98
or
Fusible Disconnect switches
FUSERBLOC UL
sirco-ul_005_a_1_cat
UL489 - Molded case switches
(equivalent to CSA-C22.2 no 5)
This requirements cover Molded-case Circuit Breaker, Molded
case switches and fused Molded-case switches, rated at 600
volts or less and 6 000 amperes or less.
UL 508
Non fusible switches
SIRCO M UL508
sircom_174_a
UL standards for Electrical Machinery
UL508 - Industrial Control Equipment
(equivalent to CSA-C22.2 no 14)
These requirements cover Manual, magnetic and solidstate
Starters and Controllers, Overload relays, pushbuttons, selector
switches, control lights…
These products are IEC type products, smaller requiring only
a creepage distance between phases of 1/2 inch. UL508
standard requested only 5 kA or 10 kA as short circuit withstand
with fuse protection. Their use as a disconnecting mean is
therefore limited to local disconnection of motors. These
products can only be used as a disconnect mean when they
have been additionally tested “suitable as motor disconnect”.
This additional testing ensures that the switch as a proper
closing capacity on short circuit. UL508 (switches or Circuit
breakers) can not be used as main disconnect of a electrical
panel. (i.e. in entrance of control panels).
NFPA 79 Electrical Standard for industrial machinery
The following types of machines are identified as industrial
machinery:
metalworking machine tools, including machines
that cut or form metal,
plastics machinery,
wood machinery, including woodworking, laminating, and
sawmill machines,
assembly machines,
material handling machines, including industrial robots and
transfer machines,
inspection and testing machines, including coordinate
measuring and in-process gauging machines.
A manual motor controller marked “Suitable as motor
disconnect” shall be installed only on the load side of
the branch circuit protective device (UL508A 30.3.3 and
NEC 430.109(6)).
fuser_726_a
fuser_727_a
General Catalog UL/CSA Ed. 2
93