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Old 12-28-2013, 09:43 PM   #1
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Wall heater or wiring problems


Two small wall heaters in my basement suddenly stopped working. Electrical box fuses tested OK. When I used a tester to find the problem, found something that I can't understand, so I need help to fix it. The electrical box located in this basement receive two live wires from the house. Each have 120v to neutral and 240v between both. The two wires that go out of that box each have 120v to neutral but only 10v between both (instead of 240v) This is the part that I don't get it. I really appreciate an explanation before go further (tried two different testers with same results)

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Old 12-28-2013, 09:50 PM   #2
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Wall heater or wiring problems


Is this just a junction box with cable in and out? If it is then it is a loose connection.

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Old 12-28-2013, 09:53 PM   #3
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Wall heater or wiring problems


Is a 60W electrical fuse box
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Old 12-29-2013, 07:00 AM   #4
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Wall heater or wiring problems


Hope that's Amp's not watts.
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Old 12-29-2013, 07:06 AM   #5
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Wall heater or wiring problems


It sounds as if you lost a leg and you are backfeeding thru a 240V load...range or the heaters. First thing to do is call the power company. If the POCO doesn't find anything on their end, it's time to call an electrician.
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Old 12-29-2013, 07:56 AM   #6
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It sounds as if you lost a leg and you are backfeeding thru a 240V load...range or the heaters. First thing to do is call the power company. If the POCO doesn't find anything on their end, it's time to call an electrician.
He said he does have 240 volt feeding the panel box. But doesn't have 240 volt coming out. Wouldn't that indicate the problem is with a breaker in that box, or the busses in that box. Not the service coming in.
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Old 12-29-2013, 08:05 AM   #7
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Wall heater or wiring problems


Good catch, I got confused with his wording.

He has lost a leg...on the branch circuit. It's either a problem with his fuse box and the connections, or he does have a bad fuse.

I'm also a little skeptical about the overall wiring of the home. A typical 60A fuse panel will have only 1 spot for a 240V load. You will have a "Main" pullout and a (typically) "range" pullout. These two pullouts are sized for 35 to 60A cartridge fuses. A 30 or smaller fuse would require fuse adapters to be installed, and the only time I have seen them installed, are the times I've installed them.
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Old 12-29-2013, 08:36 AM   #8
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If it's a 4 fuse panel there should be 2 screws between the first and second fuse and the third and forth fuse. Check for 240 volt there. May be a bad buss connection.
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Old 12-29-2013, 11:08 AM   #9
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Hope that's Amp's not watts.
Thank you, it's amps
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Old 12-29-2013, 11:09 AM   #10
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If it's a 4 fuse panel there should be 2 screws between the first and second fuse and the third and forth fuse. Check for 240 volt there. May be a bad buss connection.
This is a two fuse box
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Old 12-29-2013, 11:57 AM   #11
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Wall heater or wiring problems


Are they cartridge fuses or screw in Edison base fuses? Post some pictures and we can all share in you fun and games!
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Old 12-29-2013, 03:44 PM   #12
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Are they cartridge fuses or screw in Edison base fuses? Post some pictures and we can all share in you fun and games!
Here a picture
Volts in: 236
volts out: 10 red-black, 114 red-white, 119 black-white
This box was working well for the last 10 years.
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Wall heater or wiring problems-img_0083.jpg  
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Old 12-29-2013, 04:00 PM   #13
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Wall heater or wiring problems


Turn off power. Remove fuses, and ohm both of them out. Replace which ever one is blown. Look for short and repair.

Turn off power to the box. Remove all wires and put in wire connectors. then reconnect wires.
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Old 12-29-2013, 04:03 PM   #14
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Wall heater or wiring problems


Turn off the feed to the panel. Go to the store and buy a new one. Preferably a circuit breaker panel with new circuit breaker. Also buy some 3/8" romex connectors. Remove the old panel throw in garbage can or recycle. Install new panel with romex connectors installed. That should take care of that problem.
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Old 12-29-2013, 04:19 PM   #15
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Wall heater or wiring problems


I'll do what you guys suggested and will post next week. Thank you and happy 2014!

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