Re: A/C receptacle wiring question

Posted by jea48 (A) on January 29, 2006 at 11:51:26

In Reply to: Re: A/C receptacle wiring question posted by pkell44 on January 29, 2006 at 10:36:46:

>>"I don't know where y'all live, but out here in tinder dry S.E. Az. if you install a 20A breaker then the code requires that the wire from that breaker AND all outlets MUST also be rated for 20A or better i.e. 12 ga. or heavier wire AND 20A outlets, switches, etc.."<<
>>>>>>>>>

That may well be a local governing code. Local governing bodies can dictate higher standards an requirements than NEC. NEC sets bare minimum requirments that "Shall" be met.

As far as NEC 2005 and many many earlier NEC code's it is legal to install two or more 15 amp outlets on a 20 amp branch circuit. A duplex is two outlets.
NEC 2005 210.21(B)(2)&(3) and Table 210.21(B)(2)&(3), page 70-50.
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>>"A fuse or breaker will not, in most instances, trip/blow until the current reaches or exceeds DOUBLE its' rating."<<
>>>>>>>>

Not true....If a breaker is operating properly it should trip if a continuious load of over it's breaker handle rating last more than just a few minutes or in the case of Square D breakers less than a few minutes. In the case of short circuit protection a breaker should trip very quickley. Exceptions, "Frank Adams", "Zenzco", "FPE", breakers just to name the worse that were sued out of existence due to electrical fires.
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For those of you who may not know Article 310 of NEC deals with the ampacity rating of conductors. For #1awg and smaller the 60 degree C (140 degree F) tables shall be used. The rating is given for the conductor/s termination, there in at the breaker and at the outlet device.

Table 310.16 page 70-142 gives the ampacity rating for, #14 awg wire 20 amps, #12 awg 25 amp and #10 awg 35 amp. There is an asteresk to the right of the wire size numbers of 14, 12, and 10. At the bottom of the page, note, "See 240.4(D)"

240.4(D) page 70-82
Basically it says for branch circuit applications the maximum overcurrent protection shall not exceed 15 amps for #14 awg, 20 amps for #12 awg and 30 amps for # 10 awg copper wire.

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Follow Ups Full Thread

Topic - A/C receptacle wiring question - hiendmuse 09:23:55 01/27/06 (18)

Re: A/C receptacle wiring question - jea48 16:39:36 01/27/06 (0)

Re: A/C receptacle wiring question - Sondek 10:34:11 01/27/06 (16)

SWO-XXX is the "mother of all outlets" :-) nt - Duster 02:08:17 01/28/06 (1)

Re: SWO-XXX is the "mother of all outlets" :-) - hiendmuse 05:00:59 01/28/06 (0)

Thank you! (nt) - hiendmuse 11:49:49 01/27/06 (0)

Re: A/C receptacle wiring question - Sondek 10:38:58 01/27/06 (12)

Re: A/C receptacle wiring question - Ifatchoi 22:18:46 01/28/06 (11)

Re: A/C receptacle wiring question - Sondek 19:29:34 01/29/06 (0)

Re: A/C receptacle wiring question - jea48 09:30:03 01/29/06 (9)

Re: A/C receptacle wiring question - Ifatchoi 18:03:39 01/29/06 (3)

Re: A/C receptacle wiring question - jea48 20:05:22 01/29/06 (2)

Re: A/C receptacle wiring question - jea48 18:21:46 02/05/06 (0)

Re: A/C receptacle wiring question - Ifatchoi 08:21:49 01/30/06 (0)

Re: A/C receptacle wiring question - pkell44 10:36:46 01/29/06 (4)

Re: A/C receptacle wiring question - Glen B 13:31:48 01/30/06 (2)

Re: A/C receptacle wiring question - jea48 16:41:40 01/31/06 (0)

Re: Indeed.... - alan m. kafton 18:05:00 01/30/06 (0)

Re: A/C receptacle wiring question - jea48 11:51:26 01/29/06 (0)

Follow Ups

Re: A/C receptacle wiring question - jea48 11:51:26 01/29/06 (0)

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