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AssuredElectrical, Master Electrician
Category: Electrical
Satisfied Customers: 4241
Experience:  Contractor-42+ Years in the ElectricalTrade
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Replacing ballast -T12-2 single pin lamp fixtures.

Customer Question

Replacing ballast for F96-T12-2 single pin lamp fixtures. Original ballast power fed from tombstones on
one end of fixture, single red and blue ballast connections connected to plunger-end lamp holders. New
electronic ballast (Philips ICN2S110SC) has black/white line and two each red, blue and yellow.
On this site, and others, wiring diagrams show bi-pin fixtures and repeated variations using those schematics
have not led to success. Confusion factor is high, so any connection help work be appreciated.
Submitted: 2 years ago.
Category: Electrical
Expert:  AssuredElectrical replied 2 years ago.
Welcome. My name is ***** ***** would be glad to assist.
I can understand the confusion, they do seem to make it difficult on the change from older magnetic ballasts to the electronic versions.
On the tomb stones with the black and white wires, did the old one have power black to one side and then out of the other side to the ballast black? Same tomb stone.
Same with white?
Then red to one side on the tomb stones on the other end and jumper between the 2 sides?
Same for blue?
Let me know and we can continue,
Customer: replied 2 years ago.
Power: Black to one tombstone then to ballast. Same with neutral (white)
Red and blue go individually to tombstones opposite power entry. No evidence of jumper.
Customer: replied 2 years ago.
If you're referring to jumper between sides of a bi-pin lampholder this is a single pin fixture.
Expert:  AssuredElectrical replied 2 years ago.
I am referring to a single tomb stone with 2 wires attached. Tomb stone has 2 wire slots one on left and one on right of the same one.
Customer: replied 2 years ago.
2 Tombstones on power-in end one with two white and one with two black.The 2 on the opposite end have only a single conductor going to each; one has a
single blue wire the other a single red. There is no jumper between tombstones on this end
Expert:  AssuredElectrical replied 2 years ago.
Ok, thanks.
You have cut out tomb stones on the one power end and the reason for 2 wires.
Since you have only one wire at the other end with red and blue, it appears you have F96-T12 lamps
The ballast you posted is for only HO lamps, which use 2 wires on each end of the lamps.
See the link below:
You will need to exchange the ballast for a standard F96-T12 ballast and it will have the single wires for the tomb stones instead of two.
It will come with a red to connect to your now power end on both lamps and then a blue for each lamp of the other end tomb stones.
So, only 5 wires and 2 will be power directly to ballast.
Let me know any clarification needed, just reply
Expert:  AssuredElectrical replied 2 years ago.
Here is the ballast you need for your fixture:
Customer: replied 2 years ago.
Well, Tommy. That's a gotcha on me. I thought I remembered that these were HO fixtures but on further inspection after your comments I see I was wrong (don't tell my wife or kids!) and these are not HO. Thanks for the help, man.
Expert:  AssuredElectrical replied 2 years ago.
No problem, glad to assist.
It does happen.