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CSA C22.2 NO 254 - MOTOR CONTROL CENTRES - FIRST EDITION; UPDATE NO. 1: AUGUST 2006; UPDATE NO. 2: JULY 2011 Organization: CSA
Date: 2005-01-01
Description:   Equipment  A motor control centre can contain, but is not limited to, any combination of equipment such as the following: (a) full-voltage reversing or non-reversing combination motor control units; (b) full-voltage multispeed combination motor control units; (c) reduced-voltage part-winding, wye-delta or auto-transformer combination motor control units; (d) solid-state industrial controllers, such as adjustable-speed drives, programmable controllers, protective relays, and the like; (e) lighting or distribution panelboards; (f) feeder-tap units; (g) incoming-line equipment, such as main lugs, fusible switch, isolation switch, or circuit-breaker; (h) control or lighting transformers; (i) special equipment assemblies; (j) combination contactor units.
UL 845 - UL STANDARD FOR SAFETY MOTOR CONTROL CENTERS - FIFTH EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING JULY 15, 2011 Organization: UL
Date: 2005-08-31
Description: EquipmentA motor control center can contain, but is not limited to, any combination of equipment such as the following:a) full-voltage reversing or non-reversing combination motor control units;b) full-voltage multispeed combination motor control units;c) reduced-voltage part-winding, wye-delta or auto-transformer combination motor control units;d) solid-state industrial controllers, such as adjustable-speed drives, programmable controllers, protective relays, and the like;e) lighting or distribution panelboards;f) feeder-tap units;g) incoming-line equipment, such as main lugs, fusible switch, isolation switch, or circuit-breaker;h) control or lighting transformers;i) special equipment assemblies;j) combination contactor units.
UL 347A - UL STANDARD FOR SAFETY MEDIUM VOLTAGE POWER CONVERSION EQUIPMENT - FIRST EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING JUNE 27, 2017 Organization: UL
Date: 2015-09-08
Description: These requirements do not cover equipment for use in hazardous locations as defined by the National Electrical Code, NFPA 70. These requirements do not cover solid state reduced voltage motor controllers (soft starters).
UL 508 - UL STANDARD FOR SAFETY INDUSTRIAL CONTROL EQUIPMENT - SEVENTEENTH EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING OCTOBER 16, 2013 Organization: UL
Date: 1999-01-28
Description: p) Definite purpose controllers. q) Solid-state logic controllers. r) Industrial microprocessor/computer systems.

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