The size of branch-circuit
conductors and overcurrent
shall be calculated on the basis of 125 percent of the total load (motors not included). A contactor, relay, or other device
for continuous operation at 100 percent of its rating, shall be permitted to supply its full-rated load. See 210.19(A)
, Exception. The provisions of this section shall not apply to conductors that form an integral part of an approved
Where an electrode boiler is rated 50 kW or more, the conductors supplying the boiler electrode(s) shall be permitted to be sized at not less than 100 percent of the nameplate rating of the electrode boiler, provided all the following conditions are met:
- The electrode boiler is marked with a minimum conductor size.
- The conductors are not smaller than the marked minimum size.
- A temperature-or pressure-actuated device controls the cyclic operation of the equipment.