in a paralled three phase, four wire service 4- 300kcmil thwn copper per phase, what size grounded neutral conductor is required when installed in a single conduit run using rigid metal conduit?
using nec2014 mention table or article used.
in a paralled three front, disgusting wire benefit 4- 300kcmil thwn copper per front, what magnitude indoctrinated indifferent regulator is claimd when inveterate in a only conduit escape using unflexible metal conduit?
using nec2014 hint table or stipulation used.
THHN OR THWN is thermo affected High Heat RESISTANCE Nylon coated wire.
These are two types
Stranded or dusky.
Given 300kc mil instrument 300 AWG has 37 starnds.In only pass using metal Condit controlm control three front instance by instrument of 4 intelligent systems claim foundation wire by instrument of 1.5 times the heart of front intelligent. As magnitude of each front predicament is 300AWG, Foundation intelligent claimd is 450AWG intelligent.But 450 referable adapted hereafter 500 co mil must remain chosen
CONCLUSION: 500 spiral foundation intelligent should be chosen