Re: Wire size question...

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Jeff Goldberg" <jeff@w...>
wrote:

>
> If it enclose in a conduit, then #10 AWG. If in open air, can use

#12. On

> this distance, there is no appreciable price difference, so unless

you have

> an important reason to go smaller, might as well use #10
>
> Jeff

I've seen a lot of numbers tossed around for wire sizes and currents
and such.

I thought that residential wiring was 12ga for a 20 amp service. that
being an insulated wire bundle, NOT in free air, but between walls, and
with a run of less than 100 feet. (increase one ga for over 100 feet
to reduce voltage drop) Kinda fast and loose, not cast in stone stuff.

And, I thought 10ga was good up to 30 amps under the same condioons ?

FREE AIR would be like in an enclosure where the heat of the wire is
easily dissapated, and that increases the wire ampacity. (OK, current
carrying capabilty, but I just like the word Ampacity)

Anyway, are you baseing that on rule of thumb, some standard or code or
something ?

this link clearly states FREE AIR, but I have seen people use it as
gospel for any and all applications.

http://www.allaboutcircuits.com/vol_1/chpt_12/3.html


Dave