Re: O/T Electric wireing

Posted by John T on March 29, 2006 at 18:43:49 from (66.244.90.98):

In Reply to: Re: O/T Electric wireing posted by VADAVE on March 29, 2006 at 15:26:26:

Dave, I sure cant argue with that, where one lives and the local inspectors determines the practices in that area.

We may just be having trouble communicating also. YOURE ABSOLUTELY RIGHT that your home "service" panel only has 3 wires ran to it from the transformer, being 2 hots and one Neutral often configured as whats called twisted Triplex Cable of the 2 insulated hots wound around the bare center Neutral. Its called 120/240 volt Single Phase 3 Wire "Service". At the service entrance YOURE ABSOLUTELY RIGHT the Neutral Buss and the Equipment Ground Buss in the panel are tied together, and at either the meter base or the panel the Neutral is bonded to earth ground via a driven ground rod or metal water pipe etc.

WHERE YOU MAY NOT BE READING ME AND WHATS CONFUSING is that once you leave that main panel with a 120 volt branch circuit, it has 3 wires being 1 Hot, 1 Neutral, 1 Equipment Ground. If you ran a 240 volt branch circuit, it also has 3 wires, 2 hots and 1 Equipment ground.

HOWEVER if you ran a circuit to a sub panel, YOU MUST RUN 4 WIRES BEING 2 hots, 1 Neutral, 1 Equipment Ground. LIKEWISE, if you run a circuit (like to an overhead buss duct) and you need to obtain BOTH 120 volt and 240 volt taps, YOU AGAIN NEED 4 WIRES. You CAN NOT use the equipment ground as the Neutral even though the device would still function. The Neutral (grounded conductor) carries normal circuit return current while the equipment ground (groundign conductor) is intended to carry ONLY FAULT CURRENT.

Thanks for the fun discussion, were making progress it sounds like its just the english language which we are havign trouble with lol

Take care yall

John T

Replies:

• Re: O/T Electric wireing Richard H. 20:16:07 03/29/06 (0)

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