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Posted By Topic: Custom built light fitting / sign

Dec 05 2018 20:03


Is the anything to be wary of connecting custom built light / sign. Sign built in NZ by professional company. assuming they have done multiple signs.

Parts (LEDs and Driver) bought in NZ so SDOCs should be fine?

Basically its just connecting 230V to the driver and from there its led through out the sign, just curious if Im responsible for design of fitting after i sign COC?

Dec 05 2018 22:14

You can either rely on a sdoc, which is probably doesn't have. Or manufacturers instructions. Without either of these you are saying it is safe to connect to the supply

Dec 06 2018 07:25

When I asked for SDOCs for fitting of course they had no idea what one was and no other sparky ever asked for one etc etc. I can get SDOCs for parts used in fitting. Would this be enough? Am I being overly cautious? For all I know at the moment it could be a brought lighting kit. Leds and driver the sign company have stuck around the fitting.

Dec 06 2018 09:39

"light fittings" not intended for use in "domestic & similar applications" don't need SDoCs. Nor do signs, as while they are "light fittings" they are not "intended to produce light for illumination". And unlikely a sign would be intended for "domestic & similar" anyway.
But the ballasts & lamps may be required to have SDoCs. Certainly for fluo ballasts & starters.
Also for ELV txs & drivers.

To answer your questions:'
- yes SDoCs for the drivers will be enough.
But they won't provide bum-cover for the rest of the sign.
- yes you are probably being over-cautious. Most signs are fully-enclosed; so as long as any exposed conductive parts are earthed where's the safety issue? As a trained & licenced electrical worker, this is simple stuff well within your capability. Putting our tender bits on the line in making decisions about electrical safety is what we are supposed to do. It's why they pay us the big bucks ("tui"). Bum-covering paperwork, when available, is a bonus; but it should not be the first consideration.