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I have several circuits that are currently getting partial…

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I have several circuits that...
I have several circuits that are currently getting partial to no voltage. I have 120v on both lines into the house, and most of my circuits are getting 120v, but I'm only getting 3.75v on several circuits. What are some possible solutions?
Submitted: 2 years ago.Category: Electrical
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Answered in 5 minutes by:
2/13/2016
Electrician: Jason, Service Technician replied 2 years ago
Jason
Jason, Service Technician
Category: Electrical
Satisfied Customers: 4,304
Experience: Over 20 years of experience in all types of installations, troubleshooting, and repairs.
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Hello. Welcome to Just Answer.

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Electrician: Jason, Service Technician replied 2 years ago

Do you know how many total circuits are affected? Where are you taking the readings?

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Customer reply replied 2 years ago
Taking the readings at the breaker box, where the wires enter the buses
Customer reply replied 2 years ago
I'm checking the total number of circuits now
Customer reply replied 2 years ago
It's actually every other circuit
Customer reply replied 2 years ago
I get 120v on one circuit, and then 3.75 at the next, then 120v, etc as I go down each side of the box
Electrician: Jason, Service Technician replied 2 years ago

Sorry for the delay. Had a phone call from another customer.

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Electrician: Jason, Service Technician replied 2 years ago

This sounds like a dead leg of power. The only reason you would get a good reading on each main is because it's reading through the double pole breakers. If you turn off all double pole breakers, you should be able to isolate one of the mains as being dead.

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Electrician: Jason, Service Technician replied 2 years ago

Or, it could be the main breaker that has the problem.

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Customer reply replied 2 years ago
Okay, so turn off all double poles, check the mains
Electrician: Jason, Service Technician replied 2 years ago

Yes, exactly.

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Customer reply replied 2 years ago
Okay with all double poles off, still getting 120v to both mains
Electrician: Jason, Service Technician replied 2 years ago

Is that when taking a reading from one main breaker lug to other main breaker lug?

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Electrician: Jason, Service Technician replied 2 years ago

When the meter probes are oriented that way, the reading should be around 240 volts, as you probably already know.

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Electrician: Jason, Service Technician replied 2 years ago

If that's the reading you are getting, then the main breaker itself is the problem. Are you able to post a photo of your panel, with all breakers shown?

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