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#77865 - 07/18/01 10:30 PM 30 Amps on #14 AWG !@#$%
Jim W Offline
Junior Member

Registered: 07/19/01
Posts: 7
Thank you this is very helpful, I was reading the code book regarding wires smaller than the ampacity rating of the breaker on table 210-4 summary of branch circuit requirements it shows # 14 taps can be used on a circuit up to 30 amps? Is this what I think it is? the little 6" pigtails of solid wire attached to your device than wire nutted to the larger wire (usually stranded) I worked with an union electrician who did that and I said you cant do that! Looks like I might have been wrong, why in the world would than allow 14 wire on a 30amp circuit? I know to fit the device, they never taught me this in two years of electric school.

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#77866 - 07/19/01 01:07 AM Re: 30 Amps on #14 AWG !@#$%
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
Hi Jim.
U mean 210-24 & T210-24.

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#77867 - 07/19/01 04:15 AM Re: 30 Amps on #14 AWG !@#$%
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
I always assumed that Table 210-24 referred to taps for fixtures whips, not wiring devices.

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#77868 - 07/19/01 04:38 AM Re: 30 Amps on #14 AWG !@#$%
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
me too Redsy, but there is a 99' change...anyone got a 99' handbook?

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#77869 - 07/19/01 08:52 AM Re: 30 Amps on #14 AWG !@#$%
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
 Quote:
Originally posted by sparky:
me too Redsy, but there is a 99' change...anyone got a 99' handbook?


My '99 handbook doesn't offer any clarification over the 96 version.

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#77870 - 07/19/01 10:24 AM Re: 30 Amps on #14 AWG !@#$%
Jim W Offline
Junior Member

Registered: 07/19/01
Posts: 7
Here a related post my new comment is at the end.

Posted by Craig (way-gate.merant.com,63.86.47.67) on July 19, 2001 at 06:37:20:

In Reply to: #14 awg on 30 amp!@#$% posted by Jim W on July 18, 2001 at 21:02:30:

I'm pretty sure what you refer to is a 30amp branch circuit supplying individual 15amp duplex receps. I think the underlying logic is that the device, in this case a 15a outlet, is only capable of drawing 15 amps in normal use. Therefore, the #14 pigtail will only be required to handle 15amps which is within it's ampacity. A direct short will cause a breaker trip before the wire heats sufficiently to cause fire, and since the pigtails are within a j-box, it's unlikely that there will be
flammable material to ignite anyway. Obviously this all goes to hell if some joker wires a 15amp plug to a 30amp device, but he gets what he deserves.
Posted by Jim W (papm3-02-207-79.dialup.dstream.net,216.73.207.79) on July 19, 2001 at 09:19:23:

In Reply to: Re: #14 awg on 30 amp!@#$% posted by Craig on July 19, 2001 at 06:37:20:

I think you have a track lets follow your line of thinking, a light will have fixed #14 wires but the load is known 100-600 watts, a outlet or device is rated at 15amps so #14 is ok, assuming you do not plug in more than 15 amps! The union electrician I was working with (a learning experience)was using #14 solid to attach outlets and switchs to a 20 amp branch circuit with #12 stranded wire in the emt and j-boxes, I said no-way, he says yes you can look how easy it is, as he bent the wire with his fingers. I agree it was much easier and faster also, when you stuff the box more room. But following this line of thinking why cant I string 6 15amp duplex recp. on a wall with #10 stranded in the emt, than just pigtail or "tap" the recp. with #14 solid. slap a 30amp breaker on it and whamo. Can I do this? It would have saved trouble on a stage I wired!

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#77871 - 07/19/01 11:07 AM Re: 30 Amps on #14 AWG !@#$%
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
The problem I see is that a 30 amp ckt. requires 30 amp rated recptacles per table 210-24

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#77872 - 07/19/01 04:01 PM Re: 30 Amps on #14 AWG !@#$%
Tom Offline
Member

Registered: 01/01/01
Posts: 1069
Loc: Shinnston, WV USA
I frequently put 15 amp receptacles on circuits rated 30 or 50 amps. When running Hi Bay lighting, many times the lighting is just controlled by the circuit breaker, so there is no need to run a lot of small circuits.

See 410-30(c)(2).
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#77873 - 07/19/01 07:05 PM Re: 30 Amps on #14 AWG !@#$%
Redsy Offline
Member

Registered: 03/28/01
Posts: 2138
Loc: Bucks County PA
 Quote:
Originally posted by Tom:
I frequently put 15 amp receptacles on circuits rated 30 or 50 amps. When running Hi Bay lighting, many times the lighting is just controlled by the circuit breaker, so there is no need to run a lot of small circuits.

See 410-30(c)(2).


Makes sense since the fixture load is known and constant. Not so with general purpose receptacle outlets.

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#77874 - 07/19/01 08:26 PM Re: 30 Amps on #14 AWG !@#$%
Anonymous
Unregistered


>if some joker wires a 15amp plug to a 30amp device
Or plugs two 10 amp devices into one duplex recept.

>why cant I string 6 15amp duplex recp. on a wall with #10 stranded in the emt, than just pigtail or "tap" the recp. with #14 solid. slap a 30amp breaker on it and whamo. Can I do this?
You may not go over 20 A on a general purpose circuit of that variety.

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