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#6910 - 01/14/02 01:28 PM Power Spike on A Phase
C.Urch Offline
Member

Registered: 05/23/01
Posts: 36
Loc: Kill Devil Hills, NC USA
Did a service call today at a municipal building where a breaker powering some receptacles (copy machine, computer, fax, etc.) trips intermittently...no rhyme or reason ever few days or so. One phase in the subpanel reads a steady 25 amps while the other spikes every 3 to 10 seconds between 15 and 40 amps. The only circuits in the panel are lighting and receptacle loads. Does anyone have a clue as to what might be causing this?

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#6911 - 01/14/02 01:41 PM Re: Power Spike on A Phase
Tom Offline
Member

Registered: 01/01/01
Posts: 1069
Loc: Shinnston, WV USA
Get that no good #$@@@*& copier on its own circuit. There is a heater in it that is cycling & them babies can draw some serious power for a split second.

Other than that, your SWAG is as good as mine.

Tom
_________________________
Few things are harder to put up with than the annoyance of a good example.

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#6912 - 01/14/02 01:52 PM Re: Power Spike on A Phase
Anonymous
Unregistered


Dealt with that problem once too. Moved the copier to a dedicated circuit and solved the problem. The newer copiers seem to draw a lot more than the older ones.

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#6913 - 01/14/02 01:55 PM Re: Power Spike on A Phase
WARREN1 Offline
Member

Registered: 05/09/01
Posts: 184
Loc: Greenville, SC, USA
Have you tried a recording ampmeter over a longer period of time? Maybe one of those Flukes that record the harmonics? Harmonics would be my first impression since you have computers, printers and copy machines.
Just a thought.

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#6914 - 01/14/02 02:16 PM Re: Power Spike on A Phase
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
Copier gets my vote.

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#6915 - 01/14/02 03:09 PM Re: Power Spike on A Phase
electure Offline

Member

Registered: 12/24/00
Posts: 4226
Loc: Fullerton, CA USA
copier

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#6916 - 01/15/02 08:25 PM Re: Power Spike on A Phase
SPARKSALOT Offline
Member

Registered: 12/24/01
Posts: 29
Loc: Omak, WA, USA
Copier,absolutly. Recently I responded to a call of a CB tripping every now and then with a chronic problem of lamps flickering. Turned out to be three copiers, any of which would cause the lamps to brown out and on the rare occasion when all three cycled at the same time the CB would trip.
Don

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