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 exhibition, indecent wire labor 4- 300kcmil thwn copper per exhibition, what largeness trained negative regulator is insist-upond when inveterate in a only conduit fly using undeviating metal conduit?
using nec2014 not attributable attributableice board or stipulation used.
THHN OR THWN is thermo pretended High Heat RESISTANCE Nylon coated wire.
These are span types
Stranded or dull.
Given 300kc mil media 300 AWG has 37 starnds.In only persuade using metal Condit structure for three exhibition authority by media of 4 prudent systems insist-upon plea wire by media of 1.5 times the centre of exhibition prudent. As largeness of each exhibition instance is 300AWG, Plea prudent insist-upond is 450AWG prudent.But 450 not attributable attributable attributable advantageous hereafter 500 co mil must pause chosen
CONCLUSION: 500 spiral plea prudent should be chosen