Troube shooting multi voltage T-5 ballasts

[RUWired]

I found 14 T-5 fixtures all with power to the ballasts but the ballasts were cold and not working. I find it hard to believe all 14 took a hit. The controller is a switch pack and it was warm and checked out ok. I checked the switch pack and the ballasts with a volt ohm meter. I can't see a back feed from the switch pack creating a false voltage anywhere. Any one else seen this before with t-5 electronics. Other switch pack relays on the same circuit are working fine. Rick

 

[barbeer]

I have not had the pleasure of installing or T-shooting T-5 equipment yet, if you run into a wall the manufacturer can be a good resource. They usually have every possible problem on the books or know something about their own product we do not.

 

[steve66]

Have they ever worked, or is it a new install?

Do you have any info on the switch packs? Model or schematic?

Steve

 

[RUWired]

Lights and controller have been in for a year or so. The ballasts got changed out since i posted and all is working. Just strange it took all at once.

 

[electricalperson]

what is the voltage going to th fixtures?

 

[RUWired]

what is the voltage going to th fixtures?

277 volt circuit, multivolt electronic ballast.

 

[electricalperson]

277 volt circuit, multivolt electronic ballast.

did you measure hot to neutral? are the lights grounded properly?

 

[RUWired]

Yep, i measured hot to neutral hot to the equipment ground, neutral to equipment ground. All checked out.

 

[electricalperson]

well somethings weird with T5's if one lamp is out the other lights on the ballast go out too. did you check the lamps? if they are electronic ballasts you can check voltage across each ends of the sockets. the company that makes them should tell you what the proper voltage is

 

[RUWired]

well somethings weird with T5's if one lamp is out the other lights on the ballast go out too. did you check the lamps? if they are electronic ballasts you can check voltage across each ends of the sockets. the company that makes them should tell you what the proper voltage is

You might have missed my first post, All the fixtures (14 ea) down stream of the controller had power to the fixtures but none were working and the ballasts were cold in each fixture.(and nobody claims they were working in the area)
Rick

 

[electricalperson]

You might have missed my first post, All the fixtures (14 ea) down stream of the controller had power to the fixtures but none were working and the ballasts were cold in each fixture.(and nobody claims they were working in the area)
Rick

did you figure out what the problem was? that is weird that all the ballasts went bad at once.

 

[RUWired]

did you figure out what the problem was? that is weird that all the ballasts went bad at once.

Nope, changed all the ballasts, working fine. (so far).

 

[electricalperson]

Nope, changed all the ballasts, working fine. (so far).

hopefully it was just a freak incident and wont happen again. if it does i have no idea what would cause it. this might be a thing for a PQA :smile: