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Thread: SIS Wiring
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01-16-2014, 10:34 PM #1
SIS Wiring
Has anyone ever seen SIS wiring used for electrical circuits in a home? I ran into this today while inspecting a single family residence. Most circuits in the electrical panel used SIS wiring. The wires were marked "SIS" and 12 gauge. The wires were stranded and looked like tin coated or aluminum. After a little research it appears this is primarily used for commercial applications and is known as "Switchboard Wire". Can this be used for residential applications? I called this out as unconventional wiring needing further professional evaluation along with other problems observed in the electrical panel.
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01-17-2014, 09:52 AM #2
Re: SIS Wiring
Wire and Cable ยป SIS Wire: Switchboard Wire and SIS Cable
If the Distribution Panel Manufacture allows it's use and the load on the branch circuit is not over 20 amps it would be correct.
It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
Billy J. Stephens HI Service Memphis TN.
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01-17-2014, 10:13 AM #3
Re: SIS Wiring
I disagree, this sounds like it is only for use in panels and equipment cabinets etc. The NEC does not have an article covering this type of wire and would not allow its usage.
All answers based on unamended National Electrical codes.
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01-17-2014, 10:22 AM #4
Re: SIS Wiring
I agree with Jim.
The NEC addresses SIS wiring in Table 310.104(4) and states the approved "Application Provisions" as "Switchboard wiring only".
That means it is allowed for use as wiring within the switchboard but not outside the switchboard for use as feeders or branch circuits.
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01-20-2014, 07:53 AM #5
Re: SIS Wiring
Homeowner worked for a company that had a lot of this lying around, got a good price on it, if you know what I mean.
Tom Rees / A Closer Look Home Inspection / Salt Lake City, Utah
http://acloserlookslc.com/
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01-20-2014, 08:14 AM #6
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01-20-2014, 09:45 AM #7
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