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Old 09-02-2010, 02:37 AM   #1
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smoking 240v outlet


Hi, I just moved into a house and was told I needed to add a cover plate over the 4-wire 240v dryer recepticle. The standard Home Depot cover plates were too small to fit over the recepticle head so i decided to replace the recepticle with a smaller headed version that my cover plate would fit over. So i took the old one out and replaced with the new one and turned the breaker back on (dryer not plugged) and the outlet started smoking. I immediately turned it off again and checked my wiring, which was Red and Black to X and Y respectively. White to the "L" shaped terminal (bottom) and bare copper ground wire to the ground/circular terminal.

Anyone know why it would start to smoke? I didnt do any readings on the voltage as i just made sure i out things back like the way they were.

Thanks
Julian

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Old 09-02-2010, 05:46 AM   #2
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smoking 240v outlet


Excessive moisture, or other foreign substance may have been present inside of that receptacle.

I'd take it back to the home-horror store, and tell `em you want a replacement from the non-smoking section ....

If you are near an electrical supply house, see if they have a Mulberry 97225 cover plate. That one should fit your old receptacle.

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Old 09-02-2010, 08:15 AM   #3
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smoking 240v outlet


Sounds like the correct receptacle was already installed but you purchased the wrong cover plate. Like KB said, the correct trim plate is available.
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Old 09-02-2010, 12:40 PM   #4
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smoking 240v outlet


Thanks. However I turned the breaker off again and took off the cover plate and pulled out the receptacle such that it was just dangling out of the electrical box. I turned the breaker back on and it did not smoke. This kinda rules out the receptacle as being bad and also my concern that maybe there was some un-stripped wire insulation in the screw fastener that was burning up.

There is a fair amount of debris in the electrical box, i wonder if it was this that was smoking rather than the receptacle...?

Also, does it matter if the 4 wires going into the receptacle are touching each other when placed back into the electrical box......?

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Julian
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Old 09-02-2010, 02:43 PM   #5
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smoking 240v outlet


Insulated wires contacting each other in the box should not be a problem.
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Old 09-02-2010, 03:53 PM   #6
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smoking 240v outlet


OK, thanks. So I guess I will clean out the debris and screw the receptacle back in and screw the cover plate back on and turn on the power again and see what happens.

Julian

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240v, 4 wire, dryer outlet, fire, receptacle


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