Breaker goop?


  #1  
Old 01-14-15, 06:13 PM
S
Member
Thread Starter
Join Date: Mar 2009
Location: United States
Posts: 459
Upvotes: 0
Received 0 Upvotes on 0 Posts
Breaker goop?

As I'm replacing / moving some breakers, I noticed on the back of the original ones there's this charcoal-colored goop on the contact area. Is this supposed to be there?

 
  #2  
Old 01-14-15, 06:15 PM
pcboss's Avatar
Forum Topic Moderator
Join Date: Jul 2002
Location: Maryland
Posts: 13,970
Received 194 Upvotes on 170 Posts
That looks like the breaker has taken too much heat and melted. Compare that to a new breaker to see how it should look.
 
  #3  
Old 01-14-15, 06:25 PM
S
Member
Thread Starter
Join Date: Mar 2009
Location: United States
Posts: 459
Upvotes: 0
Received 0 Upvotes on 0 Posts
It's not melted plastic. It's like a grease.
 
  #4  
Old 01-14-15, 06:36 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 64,639
Received 3,892 Upvotes on 3,489 Posts
Some electricians apply Penetrox, which is an anti corrosion grease, to aluminum bus bars in panels. Although not required and is not detrimental to the performance of the breaker.... that is way too much on those breakers. There should only be a very thin film.

If you intend to clean the bus bars be sure to turn off the main before touching them. Wouldn't hurt to check them with a meter to confirm they are dead.
 
  #5  
Old 01-14-15, 08:19 PM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: United States
Posts: 9,870
Received 185 Upvotes on 166 Posts
I also think that is anti-oxidant grease and it should have never been used. Anti-oxidant is used to protect aluminum wire connections from oxidizing. The aluminum busbars in a loadcenter/panelboard are tin plated, the anti-oxidant does nothing except make a huge friggen mess.
 
  #6  
Old 01-14-15, 09:07 PM
S
Member
Thread Starter
Join Date: Mar 2009
Location: United States
Posts: 459
Upvotes: 0
Received 0 Upvotes on 0 Posts
Hahaha OK, thanks..........
 
 

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