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#173181 - 01/04/08 01:11 PM 30a 250v recept on 60amp breaker circuit portable  
crselectric  Offline
Member
Joined: Sep 2006
Posts: 133
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


2017 / 2014 NEC & Related Books and Study Guides

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


Member
Joined: Jul 2004
Posts: 9,105
Estero,Fl,usa
Table 210.21(B)(3)


Greg Fretwell

#173185 - 01/04/08 03:40 PM Re: 30a 250v recept on 60amp breaker circuit porta [Re: crselectric]  
BryanInBalt  Offline
Member
Joined: May 2007
Posts: 47
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 wink

crs you ever get anyone to wire your Mom's house?


Design-Build isn't supposed to mean design *as* you build.

#173186 - 01/04/08 03:44 PM Re: 30a 250v recept on 60amp breaker circuit portable [Re: crselectric]  
KJay  Offline
Member
Joined: Nov 2007
Posts: 763
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]. smile


#173187 - 01/04/08 04:50 PM Re: 30a 250v recept on 60amp breaker circuit portable [Re: KJay]  
KJay  Offline
Member
Joined: Nov 2007
Posts: 763
MA, USA
I should clarify that that the #10 taps will only work if you hardwire the heater. tired
Since you want add an additional receptacle, it must be the same rating as the branch circuit.


#173202 - 01/04/08 09:40 PM Re: 30a 250v recept on 60amp breaker circuit portable [Re: KJay]  
sparkyinak  Offline
Member
Joined: Jul 2007
Posts: 1,327
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.


"Live Awesome!" - Kevin Carosa

#173205 - 01/04/08 10:34 PM Re: 30a 250v recept on 60amp breaker circuit porta [Re: sparkyinak]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,105
Estero,Fl,usa
You could also "tap" over to a water heater/HVAC type disconnect with a 30a OC device.


Greg Fretwell


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