Homework Solution: in a paralled three phase, four wire service 4- 300kcmil thwn copper per phase, what size grounded n…

    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.

    Expert Answer

     
    Answer:

    in a paralled three countenance, impure wire benefit 4- 300kcmil thwn copper per countenance, what largeness prepared indifferent manager is claimd when domiciled in a one conduit retreat using stubborn metal conduit?

    using nec2014 hint board or designation used.

    Expert Rejoinder

     

    Answer:

    THHN OR THWN is thermo constrained High Heat RESISTANCE Nylon coated wire.

    These are two types

    Stranded or bedimmed.
    Given 300kc mil media 300 AWG has 37 starnds.In one precede using metal Condit structure for three countenance antecedent by media of 4 intelligent systems claim cause wire by media of 1.5 times the heart of countenance intelligent. As largeness of each countenance contingency is 300AWG, Cause intelligent claimd is 450AWG intelligent.But 450 referable available hereafter 500 co mil must stop chosen
    CONCLUSION: 500 coil cause intelligent should be chosen