triplex
- Thread starter rayertz
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ptonsparky
Tom
- Occupation
- EC - retired
You may need quad. What do your job specs and AHJ have to say about it?
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Yeah, it would be quad with a ground since it's 480 3 phase. I understand totally. No AHJ or inspector. This is in Mexico @ GM. Just want to do it right!
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With all due respect they actually have both there just like the rest of Latin America. And if had to guess I would say they would be pretty interested when it comes to commercial / industrial projects performed by foreign corporations.
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
If you need 480/277 you will need at least 4 insulated conductors plus an EGC to have a compliant feeder.
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electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
messenger supported wiring is perfectly acceptable, even for permanent installations. I am not aware of any triplex or quad that actually has NEC conductors, but no one seems to enforce it. Also as mentioned you would need a 4th insulated wire for three phase with neutral.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
It can be dual rated.
From Southwire:
Southwire's triplex 600 volt secondary UD cable meets or exceeds all applicable requirements of ICEA S-105-692 for cross-linked polyethylene insulated conductors and UL Standard 854 for Type USE-2.
Southwire’s triplex Type RHH or RHW-2 or USE-2 AlumaFlex® is primarily used for secondary distribution and underground service at 600 volts or less, either directly burial or in ducts, where increased flexibility is needed. May also be used in conduit as specified by the NEC.
https://www.southwire.com/ProductCatalog/XTEInterfaceServlet?contentKey=prodcatsheet186
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
But those arent messenger supported. You can "make your own" messenger supported wiring system by taking that stuff and strapping it to a messenger, but as far I know all the stuff that comes factory twisted together with the bare messenger is not an NEC chapter 3 type.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Ah, you are referring to ACSR stuff. You are correct then, non of that stuff is NEC Chapter 3 compliant but often used.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
I just checked, factory assembled multiplex cables do not need to have NEC recognized insulation. Look at 396.2(4).
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
Oh cool, wasn't aware of that one. Suprised they don't make 4 plus messenger aerial cable. You would think that after the NEC ditched the rebonding allowance between structures, that would start to be a thing.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
Those are 3 plus messenger. Want 4 plus messenger. Quintplex?
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Not sure, have to search. You could special order it but $$$.
jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
Ain’t happening. I searched.
Tray Cable with a separate messenger is a possibility.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
- Occupation
- Electrician
Yeah that's what I thought, as I said in post #11. But this is the site to test a "they don't make that" statement
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