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Discussion Starter #1
Thank you for the help..

I have a new Microwave that has 4 wires
Blk
White
Red
Bare
Requires a single phase 20Amp breaker.

I am wireing it to a standard 15AMP wire and will swap out the Breaker to 20AMP
Blk
White
Bare

What wires connect togeter?
Blk to Blk
White to White
Bare to Bare
Red to what???
Thanks for the assistance.
 

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What do the wiring instructions state ?
If it's new it should have wiring instructions included

You can't use 15a wire & install a 20a breaker
 

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Licensed Electrical Cont.
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WHY do you have wires???
I have never seen a microwave that is hard wired, even a commercial unit.

I also agree with Scuba, your statement that you have "15A wire" and will swap out the breaker for a 20A should be pretty obvious that it is wrong.

Do you have a make and model of this unit?
 

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Discussion Starter #4
thanks for the help:

Link to the install guid is:
http://kitchenaid.com/assets/pdfs/product/ZINSTALL/KBHS179SSS_Installation%20Instruction.pdf


This is what I got from th Install Guide.

When a 4-wire or 3-wire, single phase 120/208 or 120/240
volt, 60 Hz, AC only electrical supply is available, a 20-amp
maximum circuit protection is required, fused on both sides​
of the line.

4 wire:
1.​
Connect the 2 black wires (B) together using a UL listed wire
connector.

2.​
Connect the 2 red wires (C) together using a UL listed wire
connector.

3.​
Untwist white wire from green (or bare) ground wire coming
from the microwave oven.

4.​
Connect the 2 white wires (F) together using a UL listed wire
connector.

5.​
Connect the green (or bare) ground wire (H) from the oven
cable to the green (or bare) ground wire (in the junction box)
using a UL listed wire connector.

6. Install junction box cover.

3Wire:
1.​
Connect the 2 black wires (C) together using a UL listed wire
connector.

2.​
Connect the 2 white wires (D) and the green (or bare) ground
wire (of the microwave oven cable) using a UL listed wire
connector.

3.​
Connect the 2 red wires (G) together using a UL listed wire
connector.

4. Install junction box cover.
 

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Discussion Starter #5
Thanks guys for the help. I am wanting to use the standard wire that ran sink disposal to now run the microware. This is a built in Kitchenaid and is hardwired.
Posted the link to the install guid above.
 

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I'd say their instructions are wrong
US does not use 3 wires with these colors

You'll need to contact the Mfg for proper connection to be safe
Sounds like they just mixed up the colors
But if you connect it wrong you could fry it

It almost seems like they want a 240v connection

Unless Speedy can decifer

3-Wire Cable from Home Power Supply - U.S. Only


IMPORTANT:
Use the 3-wire cable from home power supply
where local codes permit a 3-wire connection.


1. Connect the 2 black wires (C) together using a UL listed wire connector.


2. Connect the 2 white wires (D) and the green (or bare) ground
wire (of the microwave oven cable) using a UL listed wire connector.

3. Connect the 2 red wires (G) together using a UL listed wire connector.
4. Install junction box cover.

This microwave oven is manufactured with a neutral (white)

power supply wire and a cabinet-connected green (or bare)

ground wire twisted together.


Use 12 gauge copper wire.


 

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Wow, that is a hell of a microwave. Is it a convection oven too? At 120/240v I suspect it is.

You are NOT going to use the old 120v feed for this new oven. You will need a new "4-wire" feed. IE: 12/3 cable. Two hots, neutral and ground.

The "3-wire" feed show in the instructions would be an older non-grounded circuit which was allowed under older codes. With these circuits the neutral served as both neutral and ground. These circuit are no longer allowed to be run new.
 

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Discussion Starter #8
Thanks guys, Looks like I will need to get my Electrical friend involed to pull a new wire and fix it up correctly. Great learning experience though.

Matthew
 

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Discussion Starter #9
Speedy and Scuba I hope you guys are online as your advice is great.

OK I dug around between the floors of my main level and finished basement and found an extra AWG 14 with a Red, Whit, Blk and Bare. Can I use this wire to run this Make Daddy Microwave?? Instruction state that a "4-wire" feed. IE: 12/3 cable. Two hots, neutral and ground would be used.

I am not sure of the rating of the AWG 14, but I need it to handle 120/240v 20 AMP.

My licened electricial friend will be helping Thursday, but I would love to have a line in place to save me labor money. He is a friend, but still has to make a living.

thanks
 

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Discussion Starter #11
Thanks ...

Thought I would get lucky. Kitchen re-do is such a great experience. Any I have a full time job on top of it all.

Thanks
 
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