Article 310.15.(B)(2)(c)

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Article 310.15.(B)(2)(c)

#194159 05/13/10 04:41 PM

Joined: Jan 2004

Posts: 1,507

Michigan USA

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George Little Offline

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How is Article 310.15.(B)(2)(c) applied in your area? What is used for a base temperature? Can one use the information on the weather channel for your area's average temperature on the hottest month of the year? Do you have to use the ASHRAE Handbook? How about that 3 questions for the price of one

George Little

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Re: Article 310.15.(B)(2)(c)

George Little #194163 05/13/10 06:29 PM

Joined: Jul 2004

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Estero,Fl,usa

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gfretwell

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I cross posted this over on Fl IAEA to see what they say.

I never had an inspection on a roof since this article appeared.

Greg Fretwell

Re: Article 310.15.(B)(2)(c)

gfretwell #194166 05/13/10 07:06 PM

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Posts: 1,507

Michigan USA

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George Little Offline

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Thanks Greg, since I live in a northern state, we don't have much of an issue with this type of installation but I'm sure you might or possibly some other state.

George Little

Re: Article 310.15.(B)(2)(c)

George Little #194179 05/14/10 01:12 PM

Joined: Jul 2004

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Estero,Fl,usa

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gfretwell

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I got this back From Bryan Holland (BHGravity here)

Quote

I am using the guidelines established by the CDA. As indicated in the FPN, the CDA guidelines utilize the average of the 2% ASHRAE design temperatures for each region and major city in the state.

The guildelines and sliding scale card can be obtained FREE from www.copper.org
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Bryan P. Holland, ICC Electrical Code Official
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Greg Fretwell

Re: Article 310.15.(B)(2)(c)

gfretwell #194195 05/14/10 11:13 PM

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Estero,Fl,usa

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gfretwell

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This got going. It is worth a peek

http://www.iaeifl.org/forums/ubbthreads.php/topics/7244/310_15_B_2_c.html#Post7244

Greg Fretwell

Re: Article 310.15.(B)(2)(c)

gfretwell #194228 05/16/10 10:13 PM

Joined: Jun 2004

Posts: 1,273

Sacramento, CA

T

Tesla

Member

In Las Vegas the local ordinances super-cede this Code provision.

Ground temperatures are considered such a threat that the typical PVC-under-slab run is restricted to absolute minimums and the conductors get derated.

Hence, a grocery store ( example ) has all of its circuits run in EMT overhead and de-rated one bump.

Tesla

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ECN Forum Forums Code Related Discussion NEC & other Code issues Article 310.15.(B)(2)(c)