On Tue, Apr 17, 2018 at 9:00 AM, Gene Heskett <ghesk...@shentel.net> wrote: > > i don't see why not, Lester. 12 or 24 volts would go a long ways toward > keeping the NEC out of your hair. Insurance folks are stickier about > such stuff, so I'd ask them if they had any special wireing rules for > low voltage led lighting. The only thing that comes to my pre-coffee > mind is the heavier wire the 12 volt stuff would need, whereas 24 could > run on a gauge smaller, and 48 on really small wire. I would fuse it, > using fuses of 150 to 200% of the leds draw though. Provided that was > also under the wires textbook ampere capacity. > > I don't know if the NEC has addressed that yet. but I'd sure do some > checking before I built a $100k house with all led lighting. My copy is > now 20 years old, and that chapter wasn't even a twinkle in anybodies > eyes then. > Be careful with DC: the DC circuit arcing is much worse than AC. That's why DC specs for switches and relays are significantly derated compared to AC. The LED lighting fortunately mitigates that somehow by using much less current, but if you wire the whole system and push tens of amps, it would be a mistake to just wing it because "NEC doesn't cover low voltage".
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