Tables > Motors > Units > Running overload units
Running overload units for all motors

Kind Of Motor Supply System Number & Location Of
Over-Load Units, Such
As Trip Coils Or Relays
1-Phase ac or dc2-wire, 1-phase ac or dc, ungrounded1 in either conductor
1-Phase ac or dc2-wire, 1-phase ac or dc, one conductor ungrounded1 in ungrounded conductor
1-Phase ac or dc3-wire, 1-phase ac or dc, grounded neutral1 in either ungrounded conductor
1-Phase acany 3-phase1 in ungrounded conductor
2-Phase ac3-wire, 2-phase ac, ungrounded2, one in each phase
2-Phase ac3-wire, 2-phase ac, one conductor grounded2 in ungrounded conductors
2-Phase ac4-wire, 2-phase ac, grounded or ungrounded2, one per phase in ungrounded conductors
2-Phase ac5-wire, 2-phase ac, grounded neutral or ungrounded2, one per phase in any ungrounded phase wire
3-Phase acany 3-phase3, one in each phase*

*Exception: Where protected by other approved means.
 
 
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