Re: Fire Wire Solid vs. Stranded

[ABLE1 <someone@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



On 10/30/2015 2:01 PM, Bob La Londe wrote:
> I imagine it depends on the application.  I've seen approved commercial
> systems in schools all wired with THHN stranded in conduit.  I don't see any
> issue with stranded, and I seem to recall some older style pull stations
> that came with stranded pigtails on the actual switch.
>
>
>
> "ABLE1" <someone@xxxxxxxxxxx> wrote in message
> news:sQwYx.794$kk3.108@xxxxxxxxxxx
>> Hey all,
>>
>> I just found out that apparently Stranded wire FPLR etc. is available and
>> is acceptable in wiring of fire alarm systems.
>>
>> Well that just makes my brain hurt.
>>
>> It may have been OK per code for sometime or forever but I just became
>> aware.
>> I always use solid and I think even after this new info will continue so
>> it should not make a difference.  I just did not think it was allowed as
>> per code.
>>
>> Anyone else have input on this??
>>
>> Educated me!!!
>>
>> Thanks,
>>
>> Les
>>
>>
>
>