Which Ballast?


  #1  
Old 04-01-16, 08:07 AM
D
Member
Thread Starter
Join Date: Feb 2001
Location: United States
Posts: 110
Likes: 0
Received 0 Likes on 0 Posts
Which Ballast?

I have 2 florescent fixtures that are 48" long that have 4 bulbs in each. 2 bulbs that are size 12 type do not light up and I have put new bulbs in each. It has 2 ballast in each, how can I tell which ballast is bad?
 
  #2  
Old 04-01-16, 09:09 AM
Tolyn Ironhand's Avatar
Group Moderator
Join Date: Nov 2007
Location: United States
Posts: 15,030
Received 628 Likes on 537 Posts
You can turn on the fixture with only the working bulbs in place. Leave it on for a while. The hotter ballast is the working one. Otherwise you can pull the socket brackets out and trace the wires.
 
  #3  
Old 04-01-16, 10:55 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 70,984
Received 3,176 Likes on 2,852 Posts
If they are really old fixtures..... they may not light with new tubes. New tubes need a good kick to get them going and the older ballasts don't supply it.

Consider replacing the ballast with a four tube T-8 model and replace the tubes with T-8's. The tube sockets are the same.
 
 

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