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General Chatter >> The Lounge >> guys any electrician,s here ???
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Message started by billy on Aug 14^th, 2010, 11:56pm

Title: guys any electrician,s here ???
Post by billy on Aug 14^th, 2010, 11:56pm

guys need some help please need to replace an electronic ballast on a lighting unit ok the old ballast
has 8 terminals (wires) and the and the new one has 7 terminals so need to know what why this works

pics of the old and new ballast (old one is the top )
http://i210.photobucket.com/albums/bb188/billydiscus/lightingunitold.jpg

http://i210.photobucket.com/albums/bb188/billydiscus/lightingunitnew.jpg

cheers

Title: Re: guys any electrician,s here ???
Post by billy on Aug 16^th, 2010, 4:33am

:-/

Title: Re: guys any electrician,s here ???
Post by cromwell on Aug 16^th, 2010, 12:02pm

Looks like 1 to 4 is the same and one to seven, can't you put 8 with 7 ?

Title: Re: guys any electrician,s here ???
Post by Hamrag1 on Aug 16^th, 2010, 3:39pm

Looking at the two ballasts, I would say that the only difference is that the old one feeds the two heaters on one side of both lamps, as separate parallel feeds, whereas the new one connects them in series.
If so I would try connecting 1 - 1, 2 - 2, 3 - 3, 4 - 4, 5 - 4, 6 - 5, 7 - 6, and 8 - 7