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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...

Hello everyone, we have utility supplied distribution transformer, having a three phase connection YY with both neutral grounded, My question is 1. Does ground fault current magnitude in the secondary will be the same in primary, since the star point of two sides have common ground connection...

voltage drop calculation should also be considered in sizing of conductor , at least not more than 15% upon starting

it cause ampacity reduction

On what rating should transformer must have 87T protection, any standard reference should be follow?

Try to contact the vendor, there no such enough details, its brand literature