Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-19-2011, 10:37 AM   #1
Newbie
 
Join Date: Apr 2011
Posts: 4
Share |
Default

sub panel ground


I have a 25 year old house that has a subpanel to a pool shed. The only thing on that panel is the pool pump, but there is room to add other circuits. It is in a great location to add a 50 amp circuit for a 4 way plug to a RV. The only problem is there is only three wires from the main panel to the sub panel, and there is no separate ground bus.

My question is: Can I install a ground bus in the sub panel and connect it to a ground rod in the pool shed without having a ground wire going back to the main panel?


Last edited by katahdin; 04-19-2011 at 10:43 AM.
katahdin is offline   Reply With Quote
Old 04-19-2011, 11:42 AM   #2
Member
 
Join Date: Jun 2007
Posts: 3,503
Default

sub panel ground


If this panel is detached from the house it should have its own ground rod or rods. Yes, you can use your existing sub panel to feed a 50 amp RV receptacle. You need a ground rod out there at the sub panel. And yes, you can add the ground bar if you need the room. This sub panel (3 wire) has the grounds and neutrals connected together. This is only for a legal three wire feeder.

One more question? Where does the sub panel get its power from?

J. V. is offline   Reply With Quote
Old 04-19-2011, 01:05 PM   #3
Newbie
 
Join Date: Apr 2011
Posts: 4
Default

sub panel ground


The subpanel is attached to the outside wall of a garage. A tin roof lean to shed is attached to this wall and incloses a pool pump. The power is from the main panel on the other side of the garage in a shed that is part of the house. Three wires come from the main panel to the subpanel - 2 hots and a neutral. In the main panel the neutral and the ground are the same bar.

The three options I've considered are:
  • Attach the ground and the neutral to the same bar in the sub panel
  • Put in a ground rod and a ground bar in the sub panel and attach the ground to this.
  • Run a new four wire line from the main panel.
I'm not sure the first option is safe. I'm asking about the second option, but I'm not sure it will work without a ground wire run back to the main panel. I'm sure the third option will work, but I'm trying to avoid tearing into the sheet rock wall to run a new line.

Thank you so much for your help. As you can tell - I'm new to this. I've done simple electrical work in a hunting camp, but that's about the limit of my experience.
katahdin is offline   Reply With Quote
Old 04-19-2011, 01:10 PM   #4
Newbie
 
Join Date: Apr 2011
Posts: 4
Default

sub panel ground


One other option is to install a 30 amp breaker instead of the 50. The RV will work on this for most things as long as both AC's and the microwave aren't running together. This will only need three wires, one hot, one neutral, and one ground. I still have the same questions about the ground, but it may be safer to do it this way instead of having two hot wires to the RV.
katahdin is offline   Reply With Quote
Old 04-21-2011, 11:13 AM   #5
Newbie
 
Join Date: Apr 2011
Posts: 4
Default

sub panel ground


bump -
katahdin is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
new sub panel BlueBSH Electrical 11 01-22-2012 08:28 AM
Sub Panel Ground and Neutral COLDIRON Electrical 6 01-08-2011 10:49 AM
100 -> 200 amp panel upgrade questions philipjcaputo Electrical 1 10-30-2009 03:35 AM
This doesnt seem right. JoulesWinfield Electrical 27 07-26-2009 07:40 PM
Nuetral from feeder cable to main panel question? TW Lucas Electrical 14 05-08-2008 11:33 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.