Cite a code section.
If my county had inspectors, which they don't, what would I ask?
"Uh, I have a circuit that doesn't need a neutral; in fact, I don't even
have anything to attach it to. Do I need a neutral?"
I presume they would tell me that if I don't need a neutral, I don't need a
Don't believe it ... a neutral is NOT required for the 220/240 equipment
circuit that you are originally asking about.
However, do be VERY careful about colors ... when what is normally the
neutral, (white) wire in the 10/2 w/G you mentioned, is used as one of the
two current carrying wires in a 220/240 circuit, it should be taped/marked
on BOTH ends, usually with black tape, to clearly indicate that is carrying
current and is NOT a "neutral".
This is important, _is_ a violation of code if not done ... and may be a
source of the confusion.
So here's a question for any electrical inspectors that may be listening in:
Code requires that any wire so marked must be "permanently reidentified....by
painting or other effective means". Is taping "permanent" or "effective"
enough? I usually use a permanent marker.
Doug Miller (alphageek at milmac dot com)
If you've got 240V equipment with no 120V accessories, then there's no
reason to have a neutral.
For a pure 240V load you have two hots and a grounding conductor (aka
"ground"). No neutral is needed or required by code.
The only time you need a grounded conductor (aka "neutral") is when you
have unbalanced loads on the two hots. This is only the case if you
have a mix of 120/240V devices on that circuit.
This comes up about once a month, it seems, in alt.home.repair. So far,
nobody has been able to substantiate an instance of this actually happening.
Maybe you can be the first.
In any event, what he's proposing to do isn't hazardous in the least.
He doesn't *need* a neutral for a 240V motor.
Doug Miller (alphageek at milmac dot com)
Oh, yeah, and I'm sure the insurance companies refuse to pay when
you've plugged too many devices into your extension cord, like you
promised you wouldn't too.
I've read and re-read my homeowners policy and while some of the fine
print is quite "amusing", damn if I can find that clause about not
paying if the wiring is not up to code.
For every complicated, difficult problem, there is a simple, easy
solution that does not work.
If there are no 120 accessory items on the machine.
However, as one who is at this very moment lamenting the fact that he
did not plan ahead and pull what he should have pulled when he
originally built his shop, and now to expand it will have to pull
again, knowing it would have been just as easy and not much more cost
to pull more than one would need, my advice in that area should be
predictable (as I slap my head in dismay).
You do not need a grounded conductor if you do not have any
requirement for it on the machine.
You DO need a grounding conductor. You're health and well being might
require it. Additionally, you will negate the work of that fine
individual(s) at the end of the assembly line who painstakenly checked
each and every machine for complete ground continuity before it was
shipped to you.
In my area, the only requirement for a licensed electrician is at a
service entrance set, and no permit is required to run a circuit
inside your house.
I don't know about your insurance policy, but mine does not have a
clause where I promise to hire an electrician, disallowing the policy
if I don't.
"clause where I promise to hire an electrician"
No, its not likely to be so clearly identifiable in the small print. But
they are rife with exculpation clauses. So is your mortgage agreement.
Basically, they are not insuring against your failure to do things properly,
follow the codes, etc.
I'll bet you have never read your insurance policy or mortgage agreement all
the way through. Not being a smart-ass here, but trying to make thepoint
that it is best to build in right and bulletproof the first time out for a
number of reasons not necessarily limited to insurance, liability and so
Let's leave it at: "If your house burned down as a result of an electrical
fire, would call you all the insurer and advise that you had installed the
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