What is Code/Best Practices for Running a 240V cable to other Side of Room?

imautoparts

I need to move a 240V junction box from one side of the room (it used to feed a heater circuit) to the other. I presume this means I'll have to fish wire from the wallbox on the North wall up and over in the attic to the new box on the South wall.

What is code/best practice for this? Can I use heavy duty romex or do I have to enclose the wire in a tube of some kind? Any other tips?

Speedy Petey

What do you mean by "heavy duty" romex? Never heard that term before.

Just use the same cable as the circuit and an appropriately sized junction box. If the existing box is big enough just bring the new wire into that and splice there.

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diystephen

Is this a continuation of this thread?

So suddenly I'm a "handyman".

oh'mike

Speedy Petey---have the codes remained the same over the years? Does the new circuit need four wires? two power one neutral and a ground?

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k_buz

It would depend on the load. Many 240V loads do not require a neutral. You are thinking of sub panel codes.

For sub panels, the codes have "recently" changed regarding detached structures, but the 4th wire (EGC) for subs in the same structure have remained the same for as long as I can remember.

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Jim Port

Mike, if the code has changed like for stoves and dryers, if the circuit needs to be changed it needs to be brought up to todays code.

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Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.

George6488

Please elaborate on change as I am setting up a sub-panel later this week and have the 4 wires already.

Thanks

Speedy Petey

Like the others have said, it depends on the circuit and the load. The whole "the code has changed for '220' " thing is a complete mis-nomer.

The only thing that has changed is that circuits for detached structure feeders and for household cooking appliances and electric dryers are not allowed to use the neutral to also serve as the grounding means. This is ONLY for 120/240v circuits. A straight 240v circuit would not apply since it does not utilize a neutral conductor.

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Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.

George6488

Thanks

imautoparts

No, this is for me. In my utility room I'm wanting to move the dryer from one wall to the other.

The realtor can take his own risks - but not with my skin or liability.

Speedy Petey

Then why not say this from the start, as opposed to vaguely saying you "need to move a 240V junction box" and asking if you should use "heavy duty romex"? This little detail would have eliminated confusion and cleared things up.

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Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.

imautoparts

Well, I'm not moving the junction box for the dryer. I'm using a separate 20A 240 circuit that I'm pulling from a thermostat/spst junction box that used to feed a large baseboard heater in the same room. That way I'll still have 240V on the original wall, plus 240V on a new circuit on the garage wall. I'm thinking that may come in handy sometime as I am looking at buying a big air compressor and two 240V outlets on separate circuits will be just what I need.

k_buz

Running an electric dryer on a 20A circuit?

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Speedy Petey

So you are NOT moving your dryer from one wall to the other like you said in post #10???
I'm confused.

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Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.

k_buz

Me too

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