NEC code requirement
NEC code requirement
(OP)
Hello everyone, does the NEC code allows that Circuit Breaker protecting Generator Equipment must have "ground fault protection" feature or LSIG, the generator is used only in the absence of normal power supply or legally required standby power. Also genarator is also use to supply fire pump just in case of fire., Thanks every one, hoping there are positive comments.






RE: NEC code requirement
http://www.generac.com/resources-and-tools/enginee...
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RE: NEC code requirement
Check out 700.6(D), 700.27, 701.6(D), 701.26 and for 702 type loads, use 215.10
RE: NEC code requirement
"(a) Individual Sources. The overcurrent protective device(s) shall be rated to carry indefinitely the sum of the
locked-rotor current of the fire pump motor(s) and the pressure
maintenance pump motor(s) and the full-load current
of the associated fire pump accessory equipment when connected
to this power supply.
(b) On-Site Standby Generators. Overcurrent protective
devices between an on-site standby generator and a fire
pump controller shall be selected and sized to allow for
instantaneous pickup of the full pump room load, but shall
not be larger than the value selected to comply with 430.62
to provide short-circuit protection only."
RE: NEC code requirement
The use of the word 'SHALL' in NEC is mandatory
Note that NEC articles regarding services pertaining stand-by/back-up generators should be reviewed and discussed with the AHJ and/or registered PE prior to design/installation.