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Re: Fire Wire Solid vs. Stranded



"ABLE1" <someone@xxxxxxxxxxx> wrote in message
news:NyPYx.23345$bG2.5135@xxxxxxxxxxx
> Bob,
>
> I can see that THHN would be acceptable in conduit.  Back in the day most
> older
> schools had 120vac bells.  I pulled one a couple of years ago that
> was that way.  There were just pull stations and they were a hot loop on
> 120vac.
> It was so old it had whiskers and a cane.
>
> It has always been my belief that you had to use solid since if using
> stranded
> you would have perfect supervision on just one strand if others were
> broken.
> But, then when it went into alarm that one strand could not handle the
> load
> and the system would fail.  With solid that would not happen.
>
> Les
>

This link explains when and why it was changed to allow stranded scroll down
to Sec.760-71(a)

http://ecmweb.com/content/illustrated-changes-1996-necode-part-4


Doug

.




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