"Running  Overload Units:"

 


Running Overload Units

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 *

* Exception: Where protected by other approved means.


If there is anything you would like to add or if you have any comments please feel free to email E.T.E. at http://www.elec-toolbox.com/email.htm

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