ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
How's Florida doing with Hurricane Ian?
by Bill Addiss - 09/28/22 12:41 PM
Tough being a lineman's kid
by Bill Addiss - 09/28/22 12:39 PM
GFCI's pops in large numbers
by dsk - 09/26/22 04:35 AM
AFCI’s Revisited
by sparky - 09/24/22 09:58 AM
NFPA Price Increase Coming
by Bill Addiss - 09/23/22 02:22 PM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
1 members (Scott35), 27 guests, and 20 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#48075 02/03/05 09:47 AM
Joined: Dec 2002
Posts: 228
J
JCooper Offline OP
Member
Hello all, I have an existing Infared electric heater installed, nameplate amps is 25, OCP 30 amps, fed with #8 THWN in 3/4" flex. I am adding another heater right next to this one and I just wanted to make sure that I can share the #8 EGC I pulled the first time, I will just be adding the two ungrounded conductors to feed the second unit in the same raceway. I looked in 250.122 and for 30 ocp the min EGC is #10, and for 60 amp, which would be the total amps drawn by both units the EGC is still #10 so my #8 should be fine, right? Thanks

Jim

#48076 02/03/05 09:54 AM
Joined: Aug 2003
Posts: 1,374
R
Moderator
The EGC should be sized dependant upon the breaker that it needs to trip. For the 30 amp, #10 is typically fine, however, you increased the size of the ungrounded conductors (for voltage drop?), and therefore the EGC must be increased in proportion, requiring a #8 EGC. It sounds to me like your EGC size will be fine.


Ryan Jackson,
Salt Lake City
#48077 02/03/05 10:25 PM
Joined: Dec 2002
Posts: 228
J
JCooper Offline OP
Member
Sorry, I forgot to include that, the run is about 100' so I ran the #8 for VD. I thought the egc was alright, I just wanted to make sure I didn't miss something. Thanks

Jim


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
timmp
timmp
Leo, IN, USA
Posts: 28
Joined: June 2004
Top Posters(30 Days)
dsk 3
Popular Topics(Views)
297,541 Are you busy
228,356 Re: Forum
213,229 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5