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

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: 133
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
2017 / 2014 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: 9036
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 wink

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]. smile
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. tired
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: 1307
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: 9036
Loc: Estero,Fl,usa
You could also "tap" over to a water heater/HVAC type disconnect with a 30a OC device.
_________________________
Greg Fretwell
Top

Member Spotlight
Member Since: 11/17/00
Posts: 2232
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
1 registered (cableguy619), 64 Guests and 7 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 51
HotLine1 43
gfretwell 17
Trumpy 16
Ruben Rocha 13
 
Newest Members
clee512, Jdscott2005, FAIZAN, Regitest2, sureshazhagai

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