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#173181 - 01/04/08 09:11 AM 30a 250v recept on 60amp breaker circuit portable
crselectric Offline
Member

Registered: 09/24/06
Posts: 134
Loc: albany, ca
I am trying to find whether or not in the code if I can tap off a 30amp 240v receptacle for a portable space heater in a commercial space onto an existing 60 amp circuit. This is in a large pottery studio, and this is for seasonal heating in berkeley california, and it would not be used at the same time as the kiln that the circuit supplies....but I could not find any ref. about multi outlet appl. circuits and ocp in 2005 nec? Chris

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#173183 - 01/04/08 09:35 AM Re: 30a 250v recept on 60amp breaker circuit portable [Re: crselectric]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
Table 210.21(B)(3)
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Greg Fretwell

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#173185 - 01/04/08 11:40 AM Re: 30a 250v recept on 60amp breaker circuit porta [Re: crselectric]
BryanInBalt Offline
Member

Registered: 05/11/07
Posts: 47
Loc: Baltimore
I am trying to find whether or not in the code if I can tap off a 30amp 240v receptacle for a portable space heater in a commercial space onto an existing 60 amp circuit.

If you change the breaker to a 30A ;\)

crs you ever get anyone to wire your Mom's house?
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#173186 - 01/04/08 11:44 AM Re: 30a 250v recept on 60amp breaker circuit portable [Re: crselectric]
KJay Offline
Member

Registered: 11/27/07
Posts: 763
Loc: MA, USA
Also, don’t forget that since this is a branch circuit and not a feeder, the length of the #10 tap conductors would be limited to 18-inches by 210.19[A][4][c]. \:\)

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#173187 - 01/04/08 12:50 PM Re: 30a 250v recept on 60amp breaker circuit portable [Re: KJay]
KJay Offline
Member

Registered: 11/27/07
Posts: 763
Loc: MA, USA
I should clarify that that the #10 taps will only work if you hardwire the heater.
Since you want add an additional receptacle, it must be the same rating as the branch circuit.

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#173202 - 01/04/08 05:40 PM Re: 30a 250v recept on 60amp breaker circuit portable [Re: KJay]
sparkyinak Offline
Member

Registered: 07/08/07
Posts: 1295
Loc: Alaska
The closets thing you can do and meet code is install a small subpanel then install 30 and 60 amp breaker. The hassel may not be worth it because of the clearence requirements for the panel.
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#173205 - 01/04/08 06:34 PM Re: 30a 250v recept on 60amp breaker circuit porta [Re: sparkyinak]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
You could also "tap" over to a water heater/HVAC type disconnect with a 30a OC device.
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