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In Reply to: Re: Dedicated power lines (sub panel or not) posted by Tin Ear on September 3, 2005 at 07:52:18:
By code in most areas if you have 20A breakers you MUST run 12 ga. wire for everything on that circuit AND 20A outlets, etc. The same thing applys to 30A breakers. 30A breakers require 10 ga. wire and 30A outlets and plugs for everything on those circuits, which includes your stereo & TV gear. Some states/countys may vary but the NEMA code (Nat'l.) seems to be spreading accross the country. Perish the thought, but if you have a fire involving your wiring and it isn't to code your insurance will probably deny liability and with the losses they're taking from the huricanes the adjusters are using microscopes.Happy Listening !
Follow Ups:
That's the point. Paying for the difference for 10ga up from 12ga wire and 30A up from 20A outlets amounts to next to nothing cost wise when you're doing the job. As for what you plug into the outlets the only issue is that you don't exceed the 30A rating. You could plug a nightlight into a 30A outlet if you choose to and it's in no way a code issue.
As pointed out in follow-up posts you cannot use anything standard but a 30A plug in a 30A outlet because the 30A outlet is configured in such a way that non-30A plugs will not fit in the 30A outlet. This is Big Brother's way of protecting you whether you want to be protected or not. In actuality it prevents a lot of fires. A fault in a device not wired for 30A could easily start a fire before the 30A breaker/fuse would trip, somewhat analogous to putting a penny behind a fuse. As you certainly know 30A is VERY HOT, and never forget that Murphy was an optimist However, big brother could not prevent the use of an 18 ga. linecord with a 30A plug. If you want to go the distance, and your inclination to use 30A wiring and outlets and plugs suggests that you do, you should certainly consider hi-grade cryo'd outlets and plugs, as well as cryo'd breakers and even cryo'd wire to the outlets. When you reach a certain level of POOGEing EVERYTHING has an effect on sonics.Happy Wiring !
Nema 5-15R or Nema 5-20R duplex receptacles can only be feed from a 20 amp breaker. 30 amp receptacles are designed and configured as such that a 5-15P or 5-20P, plug, will not plug into a 30 amp receptacle. As far as the wire size the min for a 20 amp breaker is #12awg copper. There is not a max size.
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