MC Cable rated for underground non-PVC coated
- Thread starter Tainted
- Start date
macmikeman
Senior Member
- Location
- Planet macmikeman
Yes there is. It's called Galvanized Rigid Conduit.
That's not a cable...
ramsy
Roger Ruhle dba NoFixNoPay
- Location
- LA basin, CA
- Occupation
- Service Electrician 2020 NEC
Good information. Probably doesn’t last long, and listed fittings are cost prohibitive.
Wrap with stretch and seal silicon tape
Attachments
ramsy
Roger Ruhle dba NoFixNoPay
- Location
- LA basin, CA
- Occupation
- Service Electrician 2020 NEC
McDonald’s Douglas technical orders specified the Milspec version of this tape for F-15c wiring harnesses in pylons, subject to corrosive atmospheres at Mach 2.
- Occupation
- Licensed Electrician
No. It's all PVC coated if it can go underground.
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
FWIW, UL Standard 1569 on MC Cable lists in Table 10 a variety of outer jacket materials that may be used, including CP, CPE, ETFE, ECTFE, NBR/PVC, Neoprene, PVC, LDFRPE, HDFRPE, TPE, and XL. No idea which if any of those are commercially available.
Cheers, Wayne
Cheers, Wayne
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
Some products are marketed as having a LSZH jacket (low smoke zero halogen), so that's a possible search to try.
Cheers, Wayne
Cheers, Wayne
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
So I assume this is under a slab? IF so then isnt it "outside" per 230.6? Does the NYC code make a distinction between "outside' and "under" a building?
hbiss
EC, Westchester, New York NEC: 2014
- Location
- Hawthorne, New York NEC: 2014
- Occupation
- EC
So, why would you use underground cable in the building? Simply transition to regular MC where it enters.
-Hal
The cable is a feeder. Article 230 are not for feeders though.
Because there is no headroom inside the building cellar where the wires need to go. And I want to avoid transitioning because it will require splice boxes and I am trying to avoid splice boxes at all cost.
I have an idea. I will just chop existing concrete on the floor and make the floor hollow 2 hour rated with steel landing on top of the 2 hour fire rated floor. That way the cables are not underground in concrete, they are just in a hollow area below the floor. The run is going to be really short maybe like 4-6 feet
- Location
- New Jersey
- Occupation
- Journeyman Electrician
You can just put them in a shallow groove in the concrete and patch over them. In the slab is not underground.
As long as it's not in concrete that works too. Honestly I think it's better to chop the floor larger than a groove so that the wires can breath better. I can put steel floor on top so no one can walk over the cables
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
True however that criteria is used for other than service conductors as well
Hmmm What makes you say that? Need proof
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
I know, trust but verify. 225.32, 240.21(B)(5), 240.21(C)(4), 240.92(D)Hmmm What makes you say that? Need proof