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Old 09-16-2010, 03:53 PM   #1
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Recommends 3-wire, can I use 2?


Can I use 2-wire w/ground for this application instead of the recommended three wire by using the white wire in place of the red wire, marking it black on each end by the connection?

Thanks in advance!

http://www.grow-gps.com/docs/hph_wiring_help.pdf

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Old 09-16-2010, 04:04 PM   #2
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Recommends 3-wire, can I use 2?


Yes!!

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Old 09-16-2010, 04:28 PM   #3
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Recommends 3-wire, can I use 2?


I don't see where 3+ground is recommended although I do see where it says to cap off the white wire. Not sure why they would recommend 3+g and then cap off the white to begin with.

as jbfan states, yes, not a problem.
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Old 09-16-2010, 05:00 PM   #4
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Recommends 3-wire, can I use 2?


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Not sure why they would recommend 3+g and then cap off the white to begin with.
Because more and more of these LAME instructions are catering to DIYers. This is a shame because it is dumbing down a portion of our trade.
They assume that whomever is wiring this unit cannot grasp the concept of a straight 240v circuit without a neutral, and using XX/2 cable. Some folks don't understand that 240v, or better yet "220", does not automatically mean black and red.
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Old 09-16-2010, 07:12 PM   #5
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Recommends 3-wire, can I use 2?


Or you could use Heatex cable. Black and red, NO white.'

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Old 09-16-2010, 07:58 PM   #6
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Recommends 3-wire, can I use 2?


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Or you could use Heatex cable. Black and red, NO white.'

Is it UL approved?
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Old 09-16-2010, 09:31 PM   #7
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Recommends 3-wire, can I use 2?


Nope. Look closely, and you will see that the EGC is one size smaller than the circuit conductors.

Canadian romex is not approved for use in the US due to the reduced ground wire.

BUT, if you could purchase such a cable in the US, it would have the proper sized ground, and as such would be acceptable for such an installation.
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Old 09-16-2010, 09:55 PM   #8
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Recommends 3-wire, can I use 2?


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Or you could use Heatex cable. Black and red, NO white.'

On one hand I really like this stuff, and on the other, it is yet another thing I would have to stock/use/keep track of.
I'll stick with standard 1X/2NM cable.

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