30A dryer wiring


  #1  
Old 03-02-14, 09:07 AM
C
Member
Thread Starter
Join Date: Nov 2013
Posts: 213
Upvotes: 0
Received 0 Upvotes on 0 Posts
30A dryer wiring

Need to run #10 black, red, white, green for 30A dryer. This is in emt. So I think I can use the conduit as the ground. If so I connect to the back of the box with a ground pigtail. Does that pigtail have to be #10?

Or should I be pulling a #10 green/ground back to the panel (50')?
 
  #2  
Old 03-02-14, 09:15 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,121
Received 3,992 Upvotes on 3,583 Posts
If you are using a 1900 (4" square box) then you can use a green ground screw in the back of the box to a jumper to the receptacle. The conduit is considered a grounding method. The pigtail does need to be #10.

I like pulling a ground even thru conduit. You could use #10 green in this case.


Sorry for the confusion on my part.
 

Last edited by PJmax; 03-02-14 at 01:49 PM. Reason: corrected incorrect information
  #3  
Old 03-02-14, 11:00 AM
A
Member
Join Date: Jun 2012
Location: USA
Posts: 1,499
Received 92 Upvotes on 84 Posts
NEC table 250.122 shows minimum size is #10 copper for grounding a 30 amp circuit. I didn't think that there were any exceptions.
 
  #4  
Old 03-02-14, 01:16 PM
C
Member
Thread Starter
Join Date: Nov 2013
Posts: 213
Upvotes: 0
Received 0 Upvotes on 0 Posts
So which is it then? Can I use a #12 Ideal pigtail from the outlet to the box, do I have to run #10 all the way back to the panel or do I have to try to get a #10 around a grounding screw (that's not gonna work out well?)
 
  #5  
Old 03-02-14, 01:22 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 13,980
Received 196 Upvotes on 172 Posts
You can use the conduit as a EGC with a #10 pigtail between the box and receptacle or run a #10 back to the panel.

A #10 can be used with the ground screw.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: