Line or load side of main for gentran

[-marty]

I am connecting a new transfer switch and genset to an existing hotel.

Normally I would run from the load side of the main breaker to the line on the transfer switch.

In this case I'm being asked to run from the line side of the main breaker to the line on the transfer switch.

My concern is that if an electrician in the future opens the main breaker and opens the main on the genset, the transfer switch is still energized on the line terminals.

Is it ok to connect to either line or load?

The main breaker protects a mdp.

Thanks

 

[don_resqcapt19]

What will provide the overcurrent protection for the conductors that are connected to the line side of the main breaker?

 

[Hairbone]

Marty,

Contact the power company in your area and speak with a planner and get a copy of their Specifications For Electrical Installations pertaining to your jurisdiction. The power company rules will dictate what you can do.

The only way I know that you can have unfused conductos to a transfer switch for "normal" power off a utility transformer would be to a fire pump transfer switch, but in most cases it would be fed from MDP when you have a backup generator.

As far as your concern of energized line terminals there are all kinds of warning labeles available on the market.

 

[chris kennedy]

What will provide the overcurrent protection for the conductors that are connected to the line side of the main breaker?

Why POCO's primary fuses of course!:grin:

If the transfer switch is service rated,

If the EE decided to tap before the main because he feels MDP can't handle new load or wants to lighten load on MDP,

If POCO tranny can handle the additional load or a tranny upgrade is in the scope of work,

Whats the problem?