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Old 01-12-2010, 06:21 PM   #1
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240v vs 120v connection


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Originally Posted by codeone View Post
Some could be, however alot of code changes are due to safety issues. Example: 3 wire vs 4 wire on a druer and range. Also sub panels 3 wire to 4 wire.
In school 40 yrs ago they taught electricity is trying to find ground, not true its trying to find its source, it can go through ground to get there. It also takes all paths available to it to get there, Thats why grounds and neutrals are seperate in subpanels today.

Jus a few examples with not knowing any reasons for the recall.
Not trying to change the question and information at hand

But when you say four wire is it

two hot
one neutral
one ground??

The hott are they normally black and red correct?

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Old 01-12-2010, 06:25 PM   #2
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240v vs 120v connection


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Originally Posted by canyonbc View Post
Not trying to change the question and information at hand

But when you say four wire is it

two hot
one neutral
one ground??

The hott are they normally black and red correct?
Correct

Black and red= ungrounded conductors(hot)

White= grounded conductor (neutral)

bare copper or green= Ground wire

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Old 01-12-2010, 06:38 PM   #3
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240v vs 120v connection


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Originally Posted by Paelectrican View Post
Correct

Black and red= ungrounded conductors(hot)

White= grounded conductor (neutral)

bare copper or green= Ground wire
Thank you

Now I must ask why two hot conducting wires?

Is there a certain order you want to have the black and the red?
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Old 01-12-2010, 06:46 PM   #4
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240v vs 120v connection


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Originally Posted by canyonbc View Post
Thank you

Now I must ask why two hot conducting wires?

Is there a certain order you want to have the black and the red?
This is where you get 240 from, the red provides 120 and black provides 120. No there is no order.
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Old 01-12-2010, 09:13 PM   #5
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240v vs 120v connection


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Originally Posted by Paelectrican View Post
This is where you get 240 from, the red provides 120 and black provides 120. No there is no order.
Thank you, that makes a lot of sense.

Mike
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