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#88053 05/06/04 06:20 AM
Joined: Aug 2001
Posts: 545
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aldav53 Offline OP
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Running a 50 amp Spa circuit and going to use 6/3 NM wire. This will go through the attic and 90 out from the panel to the back of the home. I need to run emt pipe when I stub out at each end. Can I rum this 6/3 NM through the pipe? It would be ridiculus to convert to THHN wire.


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#88054 05/06/04 09:04 AM
Joined: Oct 2001
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It is required that when you leave the interior of the house or building that you convert to one of the required raceways or MC and that the equipment grounding conductor be insulated. You can move the tub inside or use an insulated egc. Sorry to be the bearer of the bad news.

#88055 05/06/04 10:21 AM
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If he used 6/3 UF for the entire run?

-Jon

#88056 05/06/04 11:35 AM
Joined: Aug 2001
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aldav53 Offline OP
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Why would the EGC have to be insulated?, it would be mechanically protected in the pipe and has the sheathing around it too.


The Golden Rule - "The man with the gold makes the rule"
#88057 05/06/04 12:56 PM
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watthead's presumption is that the circuit is running _outside_ of the house. In my question I accepted this presumption. But re-reading your post this is actually not clear.

-Jon

#88058 05/06/04 01:42 PM
Joined: Jun 2003
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680.42(C) Interior Wiring to Outdoor Installations.

This section permits one to use the chapter 3 methods for the interior portions of the wiring for a hottub.
680.40 tells us to use parts I and II for the installation of the hottub. Within these parts it tells us that the outside wired portion is required to have an insulated EGC.

Besides NM is not permitted to be installed in a wet location such as an underground raceway.
UF does not have an insulated EGC, just a covered EGC, therefore it is not permitted.

Pierre


Pierre Belarge
#88059 05/06/04 04:20 PM
Joined: May 2002
Posts: 110
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As long as he stays inside the home MN cable is acceptable as per 680.21(A()(4).

"In the interior of one-family dwellings, or in the interior of accessory buildings associated with a one-family dwelling, any of the wiring methods recognized in Chapter 3 of this Code shall be permitted that comply with the provisions of this paragraph. Where run in a raceway, the equipment grounding conductor shall be insulated. Where run in a cable assembly, the equipment grounding conductor shall be permitted to be uninsulated, but it shall be enclosed within the outer sheath of the cable assembly."

As soon as you leave the structure you would have to convert. This usually is not that difficult. This is how I interpret it. I have done it this way for awhile with no prolbems. At least not yet.

Blessings. Mark

#88060 05/06/04 06:43 PM
Joined: Jul 2002
Posts: 680
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If indeed the run is going outside, could he pull an insulated GND(THWN) with the UF in a raceway?? and just not use the bare GND.?? or would it have to be part of the cable assy.?

#88061 05/06/04 07:53 PM
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walrus,
300.3(B) would require that the EGC be a part of the cable itself and not run as a seperate conductor.
Don


Don(resqcapt19)
#88062 05/07/04 11:55 AM
Joined: Aug 2001
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aldav53 Offline OP
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("Besides NM is not permitted to installed in a wet location such as an underground raceway".)

This is not run under ground. It will only run from the top of the panel up to the attic in emt with w/p conn, through the attic, then 90 out down to the disc, then liquid-tite to the spa.
What would be the difference between that and an outdoor breaker panel having NM run to all the circuits, (which is how they are all done here in AZ).


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