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1 members (Scott35),
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Joined: Feb 2004
Posts: 494
OP
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Hi,
Is it not allowable to use an unisulated neutral in the portion of the sec's that are overhead or undeground?
I have a 200A 120/240 VAC Main Panel mounted on a pole..the feeder from the 200A main to the house is a 4/0 3 COND AL URD...2 insulated and one bare conductor (neut). w/ground rod at house..As far as I know this is a legal installation isn't it?
an insulated neutral is only required past the first OCPD EXCEPT where feed from a separate location like another building or pole?
i am getting old...so my memory is not working as good as it used to..
Thanks for any replies
Mustang
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Joined: Jun 2004
Posts: 220
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as long as the underground AL conductor meets the requirements of 230-30 EX.(D), I'd say yes, but I wouldn't put AL in the ground bare. What kind of URD is this? all the stuff I use has an insulated nuetral.
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Joined: Feb 2004
Posts: 494
OP
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Hi,
thanks for the reply. The cable looks as if it is a TRIPLEX that has been placed in the ground. I called it URD but I bet it is a TRI-PLEX XLPE.
I am planning to replace the feeder with a insulated neutral using URD (insulated neutral marked with yellow stripe).
I have seen the results of placing AL in direct contact with the earth...you end up with a white powder that loses continuity...
i inherited the job from the HO's cousin..
it looks like a 1st year apprentice took on more than he could chew..
as always, thanks for the replies..
-regards
Mustang
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Posts: 7,400
Joined: April 2002
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