The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Locked rotor, no burnout
by andey
09/30/16 04:48 AM
Temporarily feeding a panel...
by Potseal
09/29/16 11:05 PM
Massive power outage South Australia
by Meadow
09/29/16 06:46 AM
short circuit??
by Meadow
09/29/16 06:43 AM
Norwegian power?
by Meadow
09/29/16 06:36 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
HotLine1 14
sparky 10
sparky66wv 8
gfretwell 8
Potseal 7
Who's Online
0 registered (), 302 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#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

Top
2014 / 2011 NEC & Related Books and Study Guides
#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: 9012
Loc: Estero,Fl,usa
Table 210.21(B)(3)
_________________________
Greg Fretwell

Top
#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?
_________________________
Design-Build isn't supposed to mean design *as* you build.

Top
#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]. \:\)

Top
#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.

Top
#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: 1286
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.
_________________________
"Live Awesome!" - Kevin Carosa

Top
#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: 9012
Loc: Estero,Fl,usa
You could also "tap" over to a water heater/HVAC type disconnect with a 30a OC device.
_________________________
Greg Fretwell

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals