Small sub-panel that will hold a GFCI?
(what panel do you have in already?)
(B) Other Than Dwelling Units.
All 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 150 volts or less to ground, 50 amperes or less, and all receptacles supplied by three-phase branch circuits rated 150 volts or less to ground, 100 amperes or less, installed in the locations specified in 210.8(B)(1) through (B)(12) shall have ground-fault circuit-interrupter protection for personnel.
Specifically 210.8(B) only mandates GFCI for single phase:
Doesn't someone make a dead-front GFCI device with an external donut for passing your own circuit wires through?
Leviton makes one that is designed for use with a shunt trip breaker or I believe certain contactors. Its not listed only recognized.
Specifically 210.8(B) only mandates GFCI for single phase:
(B) Other Than Dwelling Units.
All 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 150 volts or less to ground, 50 amperes or less, and all receptacles supplied by three-phase branch circuits rated 150 volts or less to ground, 100 amperes or less, installed in the locations specified in 210.8(B)(1) through (B)(12) shall have ground-fault circuit-interrupter protection for personnel.
B) Other Than Dwelling Units.
All 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 150 volts or less to ground, 50 amperes or less, and all receptacles supplied by three-phase branch circuits rated 150 volts or less to ground, 100 amperes or less, installed in the locations specified in 210.8(B)(1) through (B)(12) shall have ground-fault circuit-interrupter protection for personnel.
That is for Dwelling Units... I'm guessing if this is 3-phase, it is not residential... in which case NEC 2017 states...While I posted the quote from the 2020 code, the single-phase restriction has been there for a long time...
Here's the text that appears in the 2011, 2014, and 2017 codes:
All 125-volt, single-phase, 15- and 20-ampere receptacles installed in the locations specified in 210.8(B)(1) through (8) shall have ground-fault circuit-interrupter protection for personnel.
That is for Dwelling Units... I'm guessing if this is 3-phase, it is not residential... in which case NEC 2017 states... View attachment 2554209