Main Panel Grounding Question - Electrical - DIY Chatroom Home Improvement Forum
Advertisement


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 06-29-2020, 10:51 PM   #1
Newbie
 
Join Date: Jun 2020
Posts: 4
Rewards Points: 8
Default

Main panel grounding question


Hello
I am adding a sub panel to my garage.
The main panel ground and neutral Bars in the main are full.
Since they are bonded, can I just add a new ground bar In the main panel and run both the ground and neutral off of the new ground bar for the sub panel in the garage ?

Thanks for the help
Walter
Bigdaddy61362 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-30-2020, 12:22 AM   #2
Member
 
Join Date: Mar 2020
Posts: 768
Rewards Points: 1,538
Default

Re: Main panel grounding question


Close but not quite.

You can have as many ground bars as you want to add.

However neutrals need to be on the provided or factory authorized neutral bars.

On a ground bar, the only current path is the screw threads mounting the ground bar to the panel. That is fine for grounds, which only carry current during ground faults. But neutrals carry current all the time, so they have to worry about reliability and conductor heating, arcing, etc. The factory neutral current paths are engineered for this.

Make more room on the neutral bars by evicting some grounds over to the new ground bar.

It’s unheard of for a panel maker to provide fewer neutral slots than the panel can legally use. For instance if you have a 20/28 panel that allows 8 spaces to be tandems, there’ll be at least 28 neutral spaces. But there might not be 40, so if someone cheated a way to fit tandems in every space, they could run out of neutrals.
seharper is offline   Reply With Quote
Sponsored Links
Advertisement
 
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





Top of Page | View New Posts