Suprise, the island microwave is 240V

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Buck Parrish

Buck Parrish

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The island microwave is 240 and it's on a slab,

Are you all installing alot of 240 volt microwaves?

Maybe at the rough-in I need to start installing 12/3 WG :rolleyes:
 
The homeowner will say: "What's the problem, it just plugs in" :)
 
Is it possible to use the neutral as your second hot. Is there markings that you can provide
 
Buck Parrish said:
240 only. I have a dedicated 120 . But I need a neutral
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If the microwave is 240V only and <= 20A (e.g. has a NEMA 6-15 or NEMA 6-20 plug), and you have a 12/2 cable in place that was intended to be dedicated to the microwave, then there's no problem using what you have.

If the microwave needs a neutral, then it's 120/240V, like most ranges and dryers. What's the microwave model number?

Cheers, Wayne
 
wwhitney said:
If the microwave is 240V only and <= 20A (e.g. has a NEMA 6-15 or NEMA 6-20 plug), and you have a 12/2 cable in place that was intended to be dedicated to the microwave, then there's no problem using what you have.

If the microwave needs a neutral, then it's 120/240V, like most ranges and dryers. What's the microwave model number?

Cheers, Wa
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model number KMBP100EBS It's hard wired
 
Looks like you need to swap that 12/2 for a 12/3

"The microwave oven rated 120/240 V, 20 A, has 4 wires (L1,
L2, N, and G) in the flex conduit, and should be connected to a
20 A maximum-rated circuit, overcurrent protected on both the
L1 and L2 circuits."

That is a cool oven, its not just a microwave. I want one!
 
The very few 240 MW's I've seen were in restaurants. Another headache in the reserve. Glad I'm not doing much now. I go to work and come home.
 
Buck Parrish said:
I have a 3/4 pvc in the slab. It has a 12-2 UF in it.
Actually I have two. One a dedicated 12-2 and one a 12-2 for general kitchen counter use
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🤔

Cant you pull that out and use #10 THWN?
3/4 PVC sch 40 holds 9 #10, yes?
pull in 4 #10 and 3 #12.

Edit. Saw 20 amps. Use all #12.
12-15 wires in 3/4 conduit.
 
They're "Speed Ovens" and ya they're more common now with the fancy kitchens with adorne outlets, wolf ranges, and cabinet panel fridges. I'm a fan of the 4 square behind the oven to the island and 4 square behind a drawer or in the sink area if there's one. Makes adding another wire not quite the challenge that it could be.
 
letgomywago said:
They're "Speed Ovens" and ya they're more common now with the fancy kitchens with adorne outlets, wolf ranges, and cabinet panel fridges. I'm a fan of the 4 square behind the oven to the island and 4 square behind a drawer or in the sink area if there's one. Makes adding another wire not quite the challenge that it could be.
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A box with a conduit sleeve to crawl space? Great idea. I have long pulled spares up and down from panels in that same thinking. Have also done a spare conduit up and down when doable. Have also cut an access hole if panel wall backs up to a closet, and put a plumbers access hatch there. Makes easier wire fishing.
 
I ran into the same problem this summer on a basement I wired. Supposed to be a standard microwave, I thought. But it turned out to be this 120/240 convection micro - 20a

I had two ¾" PVC in the floor, too.

I had it all pulled with THHN from an unfinished area from a 6x6 where I had two 12/2 circuits.

Good thing for me, my circuits were fished across a long soffit and into the panel in a finished wall. I just used one of the 12/2 circuits as a pull wire to slip in a 12/3, then used my green in the PVC to pull in a green and red

I've already been pulling 12/3 in places where I don't have voltage info (grinder pumps, coffee makers, etc). I've added microwaves to the list
 
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James L said:
I ran into the same problem this summer on a basement I wired. Supposed to be a standard microwave, I thought. But it turned out to be this 120/240 convection micro - 20a

I had two ¾" PVC in the floor, too.

I had it all pulled with THHN from an unfinished area from a 6x6 where I had two 12/2 circuits.

Good thing for me, my circuits were fished across a long soffit and into the panel in a finished wall. I just used one of the 12/2 circuits as a pull wire to slip in a 12/3, then used my green in the PVC to pull in a green and red

I've already been pulling 12/3 in places where I don't have voltage info (grinder pumps, coffee makers, etc). I've added microwaves to the list
Click to expand...
You never know and even when you do, stuff changes at the last minute. The more you can think ahead, the better.
 
I've never heard of a 240 VAC microwave, but I don't wire houses for a living either. With that being said, as I prepare to wire our new home once it gets framed (if it ever stops freggin' raining), is this something you guys are preparing for in new homes? Are microwaves moving to 240/120 and should I run an extra conductor to my dedicated microwave circuit just in case it needs one in the future?
 
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