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high bay lighting keeps tripping breakers #75032 02/11/07 11:55 PM
Joined: Nov 2004
Posts: 138
C
Clydesdale Offline OP
Member
My freind just recently started a business and rents an 18,000 square foot warehouse. Off the top of my head, there are about a dozen lighting circuits. The breakers should really all be replaced, and there are signs of overload in the wires(insulation falling off inside the load centers)A few of the breakers keep tripping, so I replaced them with new ones. He keeps calling me to change the breakers. As of right now, I still have a year left before I can take my journeyman's license. What would you do?

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Re: high bay lighting keeps tripping breakers #75033 02/12/07 01:22 AM
Joined: Aug 2005
Posts: 214
E
Elviscat Offline
Member
if insulation is falling off the wires it's almost certainley time for a re-wire. In my opinion.

Re: high bay lighting keeps tripping breakers #75034 02/12/07 05:44 AM
Joined: Nov 2005
Posts: 31
J
jdo1942 Offline
Junior Member
I agree with last poster that it is time to rewire, but it sound like you have marginal circuit sizing and under size wire. I suggest you increase the number of circuits and increase the wire size for voltage drop.

This sames like are there just too many lights on a circuit. While circuit is not overloaded the it probably is pushing the 80% load. You need to get the load down so you are pulling no more than 80% including the 125% for continuous duty.

Re: high bay lighting keeps tripping breakers #75035 02/12/07 10:27 AM
Joined: Nov 2006
Posts: 38
S
stevecheyenne Offline
Member
Have you put an amprobe on the wiring to see what it is you're dealing with?

How old is this installation? What kind of fixtures are they? What kind of wire is it?

[This message has been edited by stevecheyenne (edited 02-12-2007).]

Re: high bay lighting keeps tripping breakers #75036 02/12/07 04:43 PM
Joined: Jan 2001
Posts: 1,044
Tom Offline
Member
If the breakers are being used to control the lights, you should make sure that they are HID rated (it will be marked on the breaker, you usually have to special order these).


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