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Single dedicated line query

Still humming a hawing regarding utilization of a main-connected subpanel with multiple dedicated lines extending to outlets vs a single line from the main with 'pigtailed' outlets. Seem to be a pretty even split with some heavyweight opinions from both camps.

If I decided on a single line, for a 70 ft run from the main, I suspect at least 8 ga (6 ga?)wire should be used. If that is the case, is it practical (or possible) to direct that 8 ga on to the outlets? If not, what is the best method of stepping down to a smaller (say, 10 ga) size line?

A qualified electrician will be doing the work, and in fact once he began hearing of the idea of dedicated lines, asked me about this very issue. I just want to have a better grasp on what is best for my situation.

thanks
terra3

Showing 1 response by jea48

jea48
4,266 posts
 
Your electrician will tell you that the correct wire size is 12ga. with a 20 amp circuit breaker.
02-03-10: Dobieguy
#12 awg is the bare minimum size wire per NEC for a 20 amp branch circuit.

It's not possible to expect to get 6 or 8ga. wire into a wall outlet box and then hook an outlet to it.
02-03-10: Dobieguy
Most 20 amp branch circuit breakers made in recent years will accept a max wire size of #8 awg. Receptacles, usually #10 awg copper max.

What you "suspect" should be used is one thing,the electrical code says what is the correct thing to use.
02-03-10: Dobieguy
NEC code is a bare minimum electrical safety code......

Article 90
Introduction

90.1 Purpose.

(A) Practical Safeguarding. The purpose of this code is the practical safeguarding of persons and property from hazards arising from the use of electricity.

(B) Adequacy. This code contains provisions that are considered necessary for safety. Compliance therewith and proper maintenance results in an installation that essentially free from hazard but not necessarily efficient, convenient, or adequate for good service or future expansion of electrical use.

(C) Intention. This code is not intended as a design specification or an instruction manual for untrained persons.

NEC 2008
NFPA 70
.
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