I have a 220 V 30 A "ground protected" electricity supply to my pool equipment and I want to add a SWG. My local pool shop says I need a special electricity supply for a SWG and that I can expect a $400 (cdn) bill.

Are there any specific electricity dangers associated with SWG?

Among others he said my pool stair need to be grounded. Any truth to this?


P.S. I am french canadian and english is a second language to me. Please forgive me if my technical description is not clear.