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#45828 - 12/07/04 03:28 PM volt difference at panel
derater Offline
Member

Registered: 03/30/02
Posts: 182
Home where the h/o was messing w/ his dryer and (likely) shorted power to frame; then got bright/dim condition usually blamed on bad noodle; they all looked ok though it's a 50 y/o system w/ lots of stuff bundled, etc.
In the meter base at 1 hot lug was nasty rusted screw head.Line side had no votage difference, but with meter in it avg.150/90, at panel.
At any rate the whole affair is a mess (no
main breaker, split buss (?) Zinsco.Am doing 100/200a upgrade, now praying it's balanced.
Thoughts?

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#45829 - 12/07/04 05:17 PM Re: volt difference at panel
Tom Offline
Member

Registered: 01/01/01
Posts: 1069
Loc: Shinnston, WV USA
I'm thinking that the problem was a loose neutral, it could be anywhere between the panel & the transformer.

I ran across a Zinsco panel a couple of weeks ago on an inspection. i thought after I moved back East, I'd be lucky & never see one again, but I was mistaken. They are the FPE of the West.

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

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#45830 - 12/07/04 07:20 PM Re: volt difference at panel
NORCAL Offline
Member

Registered: 09/25/02
Posts: 807
Zinsco is Los Angeles'contribution to the electrical world.

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#45831 - 12/08/04 06:46 AM Re: volt difference at panel
Megawatt Offline
Member

Registered: 03/11/04
Posts: 74
Loc: Lexington,Ky, USA
It is a neutral problem...Something I have done is to eliminate the Customers equipment, by taking a piece of #4 thhn & split bolt it onto the POCO's service neutral, & connect it to the panel's neutral bar.
If the inbalance is still there, it will be a problem with the POCO's neutral connections.
If the inbalance straightens itself out, the hunt begins !!! but You will know that it is inside the Customers equipment.
The last time I did this trick, I found the problem went away, & voltage was good.
Called the POCO & told them THEY had a open neutral.....found out that a Squirrel had chewed the neutral down to the steel core out on the pole.

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