Originally Posted by Yoopersup
4160 over head to pole mounted transformer. Feeder NOT Service. Secondary 480/277 . Run dn pole with 3 hots & Ground sized by 250.66 .
I say must be 3 hots plus Neutral.
Need neutral to be able to ground at building.
Remember NOT SERVICE conductors , Owner ownes 4160 pole line.
Whatca Think??
Please give code Sections Yoopersup


This is a fine line to cross with MV primary side and as long you see the 4160 is used as delta you only need to bring the EGC that it but just beaware with the NESC requirement on MV side for disconnect and O/L requrment on primary side of transfomer but for secondary side you have to treat them as SDS.

Merci,
Marc

Last edited by frenchelectrican; 06/15/11 04:44 AM.
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)