I've got to bid on a job with 6 transformers supplying neon lights. The information on one of the transformers said 240 VA. The transformers are 120 volt on line side. Has anyone done many of these neon lights? Is there any special code requirements other than sizing, overcurrent, etc... I haven't had much success trying to find out in the code... Sort of hectic around my place with the snow, grandchildren etc..... .... Thanks a lot.. Steve PS: I'm trying to find out the load on 1 of these transformers. Some reason the 240 VA is confusing me.... Sorry to be so dumb Thanks again
Before my ignorance really shows, forget about the 240 VA, equivalent to approx. 240 watts, right??? I was taught in school before they changed it... years ago... it's coming back to me now, I think Steve...
BTW the lights are already installed, new lights, I'm just to pull power to the transformers...
Ok, grand daughter went home, and I was able to get out my code book. I found the in's and out's of the wiring required. And according to my interpretation of the disconnects required, it says in Article 600-6 ( 99 code), "Each sign and outline lihgting system, or feeder circuit or branch circuit supplying a sign or outline lighting system, shall be controlled by an externally operable switch or circuit breaker that will open all ungrounded conductors". When it says "each", I assume this means that each transformer is considered a different system, therefore requiring a disconnect at each transformer. If anyone has a different or better interpretation, I would appreciate your response. Thanks a lot, sorry for all the unneccesary questions. It's one of them rush days... Thanks again.. Steve
Steve, you'll need a switch for each primary (supply) circuit within sight of the neon. There are a few options as to where to locate the switch in the code. The reason for the switch is to provide a safe disconnect for the service tech. making repairs to the sign/neon.
Re: Neon lights#33805 01/30/0406:27 AM01/30/0406:27 AM
The "Cold-Cathode" systems I worked on had a Transformer with Secondary output of 120ma @ 5KV (600 VA), with a 120VAC Primary. Heavy sucker! One was sent with a broken Bushing (Insulator), and the replacement took weeeeeeeeeeekkkkkkkssssss to arrive!
Funny thing about the Cold-Cathode Transformer, it had no Secondary GFPE included!
The "Normal" Neon setups I have seen in the last couple years, used Transformers with GFPE sensing for the Secondary + Lamp circuitry.
All setups mentioned here used GTO-15 cable.
Scott " 35 " Thompson Just Say NO To Green Eggs And Ham!