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I have a 220VAC single phase 30 amp circuit that I would like to split into two 110VAC circuits. The 220VAC circuit has 3 wires and if I measure across the two main terminals I get the 220VAC and if I measure between a main terminal and what appears to be ground, I get the 110VAC. If I take one of the wires from one of the main terminals and what appears to be the ground of the 220vac circuit then how do I get a ground for the newly created 110VAC? Can I run a separate ground from another VAC 110 outlet and connect to the new 110VAC circuit?
You should have a black, red, white, and bare or green. If so, you can do it using the white as the neutral for both circuits. It is a shortcut I don't like, but OK by code.
Be sure you understand Labman correctly, he is using the proper terminology, you need a neutral AND a ground. You only mention "ground".
If the "ground" wire you have is insulated, then it can be used as a neutral. If the wire is bare it can only be a ground.
What Labman is referring to is to share a Neutral wire with two 120 volt circuits, which is allowed, but does have issues, we can get into later.
What I need from you is detail on the "ground" wire you have. Don't mean to be nitpicky, but there is a huge difference bewteen Neutral and Ground.
Neutrals are currect carrying conductors, and if this is not correctly, or if you do not understand, you can end up sending current through-out your electrical system's grounding.
Running another wire from another outlet is never allowed. Especially if your not sure what you are running , either a ground, or a neutral.
Where are you located?
What type of cable is this wiring?
Is the "ground" insulated or bare?
I do not beleive you have enough information to continue with what you are proposing until we get more detail from you.
Thanks for the quick responses. I checked again and unfortunately it is only a 3 wire cable for the 220VAC circuit. It has a white, black and a bare ground in a orange shield. This is what has thrown me as I was expecting a 4 wire cable for the 220, two hots , a neutral and a ground. I haven't done a voltage or continuity check from the ground of the 220 and a 110 circuit to see if there is voltage between the two or if they are indeed both at ground potential. Before I did any thing I wanted to see what the experts had to say. Thanks for all the help
Quote:
Originally Posted by tkrussell
Be sure you understand Labman correctly, he is using the proper terminology, you need a neutral AND a ground. You only mention "ground".
If the "ground" wire you have is insulated, then it can be used as a neutral. If the wire is bare it can only be a ground.
What Labman is referring to is to share a Neutral wire with two 120 volt circuits, which is allowed, but does have issues, we can get into later.
What I need from you is detail on the "ground" wire you have. Don't mean to be nitpicky, but there is a huge difference bewteen Neutral and Ground.
Neutrals are currect carrying conductors, and if this is not correctly, or if you do not understand, you can end up sending current through-out your electrical system's grounding.
Running another wire from another outlet is never allowed. Especially if your not sure what you are running , either a ground, or a neutral.
Where are you located?
What type of cable is this wiring?
Is the "ground" insulated or bare?
I do not beleive you have enough information to continue with what you are proposing until we get more detail from you.
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