|
Kind
of Motor |
Supply System |
Number & Location of
Over-load Units, such as
trip coils or relay |
|
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,
grounded neutral |
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
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 each phase * |
