[RE-wrenches] solid vs stranded AC vs DC

[Brian Teitelbaum]

Hey Darryl,

You said - " never allow a single wire to pass through a metal surface as this will induce eddy currents and magnetic effects into the metal causing voltage drop and heating"

Is that true even for non-ferrous metals, like aluminum, or say, gold?

Brian Teitelbaum
AEE Solar



-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Darryl Thayer
Sent: Monday, August 03, 2009 1:01 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] solid vs stranded AC vs DC


I looked in the code book and found stranded wire has about 2% higher DC resistance than solid, Chapter 9 table 8, and that for AC resistance the same value as DC resistance to within the table accuracy Chapter 9 Table 9

This table points out that for AC resistance it is important to know the conduit system, as the reactance will have an effect.  With AC it is important to never allow a single wire to pass through a metal surface as this will induce eddy currents and magnetic effects into the metal causing voltage drop and heating.

--- On Fri, 7/31/09, jay peltz <jay at asis.com> wrote:

> From: jay peltz <jay at asis.com>
> Subject: Re: [RE-wrenches] solid vs stranded  AC vs DC
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Friday, July 31, 2009, 10:01 PM
> Hi Darryl,
>
> But what are the differences and when do they come into
> play?
>
>
>
>
> On Jul 31, 2009, at 7:25 PM, Darryl Thayer wrote:
>
> >
> > Well there is very slight differences between AC and
> Dc But this
> > difference
> > is so slight that it has no effect on anything we will
> do.
> > Darryl
> > --- On Fri, 7/31/09, jay peltz <jay at asis.com>
> wrote:
> >
> >> From: jay peltz <jay at asis.com>
> >> Subject: [RE-wrenches] solid vs stranded  AC
> vs DC
> >> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> >> Date: Friday, July 31, 2009, 7:00 PM
> >> HI All,
> >>
> >> I'm trying to understand this wire issue.
> >>
> >> Whether or not there is a difference between
> stranded or
> >> solid wire for DC or AC.
> >>
> >> Any takers on this one?
> >>
> >> thanks,
> >>
> >> jay
> >>
> >> peltz power
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