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Old 07-01-2012, 01:43 AM   #1
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100 amp problem


new breaker box 100 amp when i plug something into outlet power drops low . 118 one side and the other side nothing.

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Old 07-01-2012, 06:11 AM   #2
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100 amp problem


Which side went to nothing (0 volts)? The side you plugged something into or the other side?

What happens if you plugged something into the other side? (Again, measure both side)

Have you tried different circuits on the same side?

Is your power officially turned on by the power company?

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Old 07-01-2012, 07:03 PM   #3
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100 amp problem


Just brought an old house that I had to rip out all the old wiring and run brand new wiring (yellow romex). Installed a new Siemens 100 amps main breaker for indoors, catalog #S2020B1100P. Installed brand new 100 amp service line, everything is new. It's 240 coming into the box reading 120 on one side and 120 on the other. When you start to tie in outlets and lights to the breakers, you can plug something into one socket it will work but when you go plug something in into another room things start to go up and down. The volts get off balance in the breaker box showing 160 on one side and 80 on the other. And sometimes different depending on what you turn on and off in different rooms things blew out like a television, computer tower, lights and etc. When you plug a lot of things up things get real, real bright but as soon as you cut a light off things will get real dim. Can you help?
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Old 07-01-2012, 07:18 PM   #4
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100 amp problem


You have an open neutral somewhere. It could be at the meter, panel, or on any of the branch circuits that are showing this problem.
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Old 07-01-2012, 07:22 PM   #5
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100 amp problem


Sounds like you have a bad neutral somewhere in your electrical service. Call your utility company ASAP.

Meanwhile I'd unplug all sensitive electronic devices. The combination of your turning on and off various lights and appliances may create such an imbalance of voltage between your phases that something, if not everything, could be seriously damaged.

A solid neutral connection all the way back to your electrical source is what's necessary to keep your voltage stable, regardless of current draw.
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