Dual circuit receptacle problem

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  #1  
Old 05-14-15, 02:34 PM
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Dual circuit receptacle problem

One double plug in Kitchen has only 1 part working. Opened it up and found that there is

240v between Black and White wires
0v between Red and White wires
40v between Red and Black

Does this mean Red wire is short somewhere i.e. with no current. More so because one area next to Kitchen i.e. bathroom and porch is out of power also.

How do I find the source of this short. How do I go to the junction box. Basement is drop slab ceiling hence reaching the wires etc. is only a matter of moving the slabs and looking at the wood frames and wiring.
 
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Old 05-14-15, 02:39 PM
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Welcome to the forums.

That receptacle is split on two circuits. There isn't a short or you would have a breaker tripping.

You've got some wiring issues there. You should see....
120vac from black to white.
120vac from red to white.
240vac from red to black.

See what you have from red to ground (the box) and from black to ground.
 
  #3  
Old 05-14-15, 02:43 PM
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So what is the solution to this? One whole section of house is out.

Will check the Red to ground and Black to ground and post later on.
 
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Old 05-14-15, 05:22 PM
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Checked the connections again

Red to Ground = 0v
Black to Ground = 240v
White to Ground = 0v

Where from here? would finding a junction box help any?
 
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Old 05-14-15, 06:32 PM
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Cal your neighbors and see if they have any issues that would point to a power company issue. I suggest calling the 24 hour power company trouble line and have this checked asap. If they don't find anything then you need to call an electrician.
 
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Old 05-14-15, 08:42 PM
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It does sound like the red and the black wires have gotten together somewhere Turn the breaker off and check resistance between the red and black wires. Check from the receptacle end and also the panel end. It should read infinite. If not, there is a short somewhere. Usually in a junction box or switch box.
 
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Old 05-14-15, 11:24 PM
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Red to Ground = 0v
Black to Ground = 240v
White to Ground = 0v
You've got a serious problem that needs to be worked on carefully.
240v from black to ground tells me you have no ground on what you are working on and that the ground is now hot.

This is going to require advanced troubleshooting. I can't see your wiring so I can only offer limited troubleshooting help. I would recommend bringing an electrician in.

There is NO SHORT here. If you had a red to black short you would have a breaker or two tripping. You have two problems. You don't have a ground on the circuit or the part of the circuit you are working on and the red wire is touching or is connected to what should be ground. It would appear that at this point the red wire and the box ground is at the same potential.
 
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