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-   -   Need Advice On How To Wire A Dishwasher (https://www.contractortalk.com/f5/need-advice-how-wire-dishwasher-410106/)

tonyc56 08-25-2018 05:29 PM

Need Advice On How To Wire A Dishwasher
 
1 Attachment(s)
I am replacing an old dishwasher with a new one. The new ones states to hook the black wire to black, white to white and bare to ground screw.
The problem is, the wiring to the old dishwasher was red, black and white. I don't know what to do with the red wire?

Attachment 466394

griz 08-25-2018 05:42 PM

first move is put a volt meter on there and see what you have...

Leo G 08-25-2018 05:49 PM

I agree, usually that setup is 220v.

Check across the white and black to see if you have 120v. Then check across the white and red to see if you have 120v. Then check across the red and black to see if you have 220v

If that is the case then you can either use black and white or red and white for your 120v power. Cap off the extra lead inside the electrical box of the DW.

rselectric1 08-25-2018 07:38 PM

Along with the good advice above, where was the red wire previously connected?

480sparky 08-25-2018 08:15 PM

I got a nickel that says the red wire is a ground wire.

SuperiorHIP 08-26-2018 12:18 AM

There is a ground wire there, why would you think the red is being used as a ground?
Have never come across a 3 conductor wire to a dishwasher before.

Jay hole 08-26-2018 12:32 AM

It looks like a separate wire.... it could be feeding something else, and they used the dw as a junction box.

nickelec 08-26-2018 02:18 AM

Put all 4 together see what happens. J/k obviously don't do that the old one was either 220 or one wire was a spare like others have suggested put a voltmeter on it and see what's on it and then let us know

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480sparky 08-26-2018 07:22 AM

Quote:

Originally Posted by SuperiorHIP (Post 7329322)
There is a ground wire there, why would you think the red is being used as a ground?....

'Cuz the red isn't part of the cable assembly.



Quote:

Originally Posted by SuperiorHIP (Post 7329322)
....Have never come across a 3 conductor wire to a dishwasher before.


And you still haven't.

mstrat 08-26-2018 07:49 AM

I'd guess the red is either live with another breaker or the whole thing is connected to a 220v breaker...so...first question would be how'd you turn off the power? was the breaker a double pull tied together or just a single 110v? Getting out a meter is the best advice...or...call someone who knows what they're doing and looking at if you're not comfortable/sure of it...or...call 9-1-1 and be ready to hit send on your phone?

MarkJames 08-26-2018 07:54 AM

Tony, are you playing us here? What was connected before, and were all the wires connected? Got a pic?

If there's access below, how about replacing that mess?

Leo G 08-26-2018 08:52 AM

Quote:

Originally Posted by 480sparky (Post 7329602)
'Cuz the red isn't part of the cable assembly.






And you still haven't.

Didn't look that close. Yep, separate wire.

rrk 08-26-2018 09:07 AM

I do like the asbestos backed flooring though

SuperiorHIP 08-26-2018 09:40 AM

Quote:

Originally Posted by 480sparky (Post 7329602)
'Cuz the red isn't part of the cable assembly.






And you still haven't.


Ah, I didn't zoom on it.

tonyc56 08-26-2018 10:20 AM

Update....i put a meter across the red wire and nuetral got no reading.
Have no idea what that red wire was used for?

AustinDB 08-26-2018 10:28 AM

good eye. where is that red wire coming from? looks like it's wrapped around the romex.

480sparky 08-26-2018 10:36 AM

My guess is it's used to either ground another circuit or feed power to it.

Jay hole 08-26-2018 12:36 PM

Possibly feeding the disposer.....

avenge 08-26-2018 01:04 PM

This is why you pay attention to how it was connected before, I take pics beforehand if there's anything abnormal.

Since it's red I would assume it brings power elsewhere and I hate assuming.

480sparky 08-26-2018 03:05 PM

Quote:

Originally Posted by avenge (Post 7331026)
This is why you pay attention to how it was connected before, .....

That's assuming you took it apart in the first place. Sometimes, it's that way when you first arrive.


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