240v not working but 120 v working


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Old 03-25-15, 04:28 PM
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240v not working but 120 v working

Cottage with 100Amp fuse panel has power.
All lights, and small appliances working, but anything 240v is not, no baseboard heater or stove.
120v outlet on stove is working.
I have checked the main cartridge fuses and they test fine.
Any suggestions would be appreciated.
 
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Old 03-25-15, 04:35 PM
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You have lost a leg. IF the main fuses are both good (how did you test them?) the next step is to call your power company. You could have a problem in the meter socket, at the weatherhead or at the pole or transformer.

What voltage do you have across the two main lugs ahead of the main fuses?
 
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Old 03-25-15, 04:44 PM
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Thanks, thats what I was thinking, I tested the fuses with a multimeter for resistance
I have not checked across the 2 legs,
Would I set the multi meter to ACV and apply to both incoming black wires?
 
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Old 03-25-15, 05:15 PM
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I tested the fuses with a multimeter for resistance
I think you are saying you have continuity through the fuses, that's good.

Would I set the multi meter to ACV and apply to both incoming black wires?
Sounds like you have a digital autoranging meter. Yes, set to ACV and you should get somewhere close to 240 volts IF the feed to the panel is good. Then, check from each leg to neutral. I would do these tests with the main fuses pulled.

If you get 240 volts ahead of the main pullout, put the fuses back in and check again after the fuses.
 
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Old 03-25-15, 05:21 PM
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Would I set the multi meter to ACV and apply to both incoming black wires?
Yes, ACV and 300 volts or higher. Should get approximately 240 volts +/- 10%. You can further test by going from one incoming lead to the meter and the other meter probe to the neutral bar which should give 120 volts and then check the other incoming line in the same way.
 
 

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