Going to have a dedicated line installed- What should i know to ask for?

Im going to have my electrician install a dedicated line or two.
He is a very experienced professional electrician, but not necessarily very familiar with the Audiophile world.

What should i know to ask in advance so i can save money later?

As a note- My main draw is a pair of Joule-Electra VZN-100 OTL's that draw about 800w together.
Rest of m system is pretty Avarage:
Merlin BAM(Fixed eq box for Merlin speakers)
Tube pre
DAC
CD Player
Miscellaneous low power devices.

Thanks!