sahababu71
New member
- Location
- calgary
If station service transformer (SST-240/120v-y/y solidly grounded) from utility and standby generator 60 KW are in same substation ground grid then is it required to ground neutral at 1st disconnect of SST? As per code is shall be but most of case when neutral coming from outside. It's separately derived system with manual transfer switch.My understanding if we ground neural at 1st disconnect means of SST then we are making parallel path with neural which reduce neural current. whats about tranfer swich bonding. is it would be only from one side either generator or SST side?