| Kind Of Motor |
Supply System |
Number & Location Of Over-Load Units, Such As Trip Coils Or Relays |
| 1-Phase ac or dc | 2-wire, 1-phase ac or dc, ungrounded | 1 in either conductor |
| 1-Phase ac or dc | 2-wire, 1-phase ac or dc, one conductor ungrounded | 1 in ungrounded conductor |
| 1-Phase ac or dc | 3-wire, 1-phase ac or dc, grounded neutral | 1 in either ungrounded conductor |
| 1-Phase ac | any 3-phase | 1 in ungrounded conductor |
| 2-Phase ac | 3-wire, 2-phase ac, ungrounded | 2, one in each phase |
| 2-Phase ac | 3-wire, 2-phase ac, one conductor grounded | 2 in ungrounded conductors |
| 2-Phase ac | 4-wire, 2-phase ac, grounded or ungrounded | 2, one per phase in ungrounded conductors |
| 2-Phase ac | 5-wire, 2-phase ac, grounded neutral or ungrounded | 2, one per phase in any ungrounded phase wire |
| 3-Phase ac | any 3-phase | 3, one in each phase* |