Kiljoy
Electrical
- Apr 15, 2003
- 132
NEC code section 670.3(A) states the following:
“The full-load current shown on the nameplate shall not be less than the sum of the full-load currents required for all motors and other equipment that may be in operation at the same time under normal conditions of use. Where unusual type loads, duty cycles, and so forth require oversized conductors or permit reduced-size conductors, the required capacity shall be included in the marked “full-load current.” Where more than one incoming supply circuit is to be provided, the nameplate shall state the preceding information for each circuit.”
Can someone please define for me “unusual type load”? The pump motors on our machines intermittently go into service factor. But for only about 30 seconds every 3-15 minutes or so (depending on the speed of a particular machine). During normal operation, the hydraulic system has a cyclic load. When calculating FLA for the machine nameplate, would this be considered “unusual” or do they mean something else?
“The full-load current shown on the nameplate shall not be less than the sum of the full-load currents required for all motors and other equipment that may be in operation at the same time under normal conditions of use. Where unusual type loads, duty cycles, and so forth require oversized conductors or permit reduced-size conductors, the required capacity shall be included in the marked “full-load current.” Where more than one incoming supply circuit is to be provided, the nameplate shall state the preceding information for each circuit.”
Can someone please define for me “unusual type load”? The pump motors on our machines intermittently go into service factor. But for only about 30 seconds every 3-15 minutes or so (depending on the speed of a particular machine). During normal operation, the hydraulic system has a cyclic load. When calculating FLA for the machine nameplate, would this be considered “unusual” or do they mean something else?