System bonding jumper sizing NEC 250.30
System bonding jumper sizing NEC 250.30
(OP)
I have a 1500 KVA (4160 Delta/ 480 Wye) transformer connected to a 3phase-3wire system (no neutral). Grounded at the X0 transformer terminal within the transformer secondary.
Secondary wiring is 6 parallel underground conuits with 3-350kcmils phase conducter per conduit.
My question is how large must the System Bonding Jumper be for each raceway (conduit)?
Secondary wiring is 6 parallel underground conuits with 3-350kcmils phase conducter per conduit.
My question is how large must the System Bonding Jumper be for each raceway (conduit)?






RE: System bonding jumper sizing NEC 250.30
RE: System bonding jumper sizing NEC 250.30
The 12.5% calculation for 6 X 350kcmils =~ 300kcmils and to purcahse commerically available wire
I would need 350kcmils bare copper; therfore, each conduit would contain (3) 350kcmils insulated phase conductors and (1) 350kcmils bare copper cable.
Thanks again
RE: System bonding jumper sizing NEC 250.30