krunkle
Member
- Location
- Montgomery, IL, USA
I just started a new job and there is a pretty long overpass that was built about 5 years ago by an outside contractor and I have a question because I have never dealt with this type of lighting.
The supply is 120v and the secondary is 12,000v which is ground fault protected. The secondary wiring is installed in 1/2" rigid to the fixtures and the lamps are wired in series. The most common problem we are having is the GTO-15 wiring is curling up and pulling itself apart. There is moisture in the conduit and after talking to a sign supply rep, he said it is most likely corona discharge that is causing this. Any input?
What is the best solution for a situation like this?
The overpass is at close to 1/4 of a mile long and has 2 separate control stations with a photo cell controlling them.
On a side note, the insulators for these tubes/connections slide over the splice (wires twisted together with no wire nuts) are very brittle and like to break (tubes themselves) frequently when removed and I was also wondering if there is a better way to make this connection so I don't have to worry about breaking them during repair/replacement?
Thanks for your input.
P.S. Almost all/if not all of the supply wiring from the transformer to the lamps has been replaced by the previous electrician and I just replaced 3 sections (48') today that he previously replaced.
The supply is 120v and the secondary is 12,000v which is ground fault protected. The secondary wiring is installed in 1/2" rigid to the fixtures and the lamps are wired in series. The most common problem we are having is the GTO-15 wiring is curling up and pulling itself apart. There is moisture in the conduit and after talking to a sign supply rep, he said it is most likely corona discharge that is causing this. Any input?
What is the best solution for a situation like this?
The overpass is at close to 1/4 of a mile long and has 2 separate control stations with a photo cell controlling them.
On a side note, the insulators for these tubes/connections slide over the splice (wires twisted together with no wire nuts) are very brittle and like to break (tubes themselves) frequently when removed and I was also wondering if there is a better way to make this connection so I don't have to worry about breaking them during repair/replacement?
Thanks for your input.
P.S. Almost all/if not all of the supply wiring from the transformer to the lamps has been replaced by the previous electrician and I just replaced 3 sections (48') today that he previously replaced.
