Search: Posts Made By: grover
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11-10-06, 05:46 PM
Replies: 15
Views: 2,196
Posted By grover

jwhite, re-read 210.19(A)(1), the paragraph that...

jwhite, re-read 210.19(A)(1), the paragraph that requires branch circuit OCP to be sized at 125%. Notice exception 1? See also, 210.20(A), 215.2(A)(1), 215.3 and pretty much everywhere else NEC...
11-10-06, 10:34 AM
Replies: 15
Views: 2,196
Posted By grover

Are you using NEC 2002? 424.3(B) was changed in...

Are you using NEC 2002? 424.3(B) was changed in NEC 2005; the way it reads now, all the general rules apply. It now reads only:

424.3(B) Branch-Circuit Sizing. Fixed electric space heating...
11-10-06, 10:04 AM
Replies: 15
Views: 2,196
Posted By grover

Space heaters are excepted from the small...

Space heaters are excepted from the small conductor requirement, per 240.3. Article 424 requires conductors be sized to 125 percent of the LOAD, not the OCP. Article 424 makes no explicit mention...
11-09-06, 08:01 PM
Replies: 15
Views: 2,196
Posted By grover

You have to derate if the breaker isn't rated for...

You have to derate if the breaker isn't rated for continuous duty. If the breaker IS rated for continuous duty, you can size it at 100%. For cheap house breakers... it's probably 30A ;)

You...
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