Products coveredThis standard applies to motor control centers to be used in accordance with the U.S. National Electrical Code@ ANSI/NFPA 70@ the Canadian Electrical Code@ Part 1@ CSA C22.1@ and the Mexican Electrical Installations (Utility)@ NOM-001-SEDE.These requirements cover motor control centers for use on circuits having available short-circuit currents not more than 200 000 A rms symmetrical or 200 000 A dc.This standard applies to single- and three-phase 50 and 60 Hz and dc motor control centers rated not more than 600 V ac or 1 000 V dc.Requirements for fire pump controllers are as provided in Annex C@ item 11.Products not coveredThese requirements do not cover switchboards or panelboards intended for the control of electric light and power circuits@ nor do they cover an individual unit for this purpose. Such units@ however@ that consist of manually or automatically operated switches@ branch-circuit or service-circuit circuit-breakers@ overcurrent-protective devices@ or the like may be used within a motor control center.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.The foregoing equipment can contain@ but is not limited to@ such items as pushbuttons@ selector switches@ indicating lights@ control transformers@ control circuit fuses@ and auxiliary devices incorporated as an integral part of the units.Units of measurementThe first values given are SI (metric) units. Alternate measurements shown in parentheses are US customary units@ which sometimes are not strict conversions.