I have been given the contract to clean the communal stair areas in a new block of flats, but have encountered a couple of problems. when I try to hoover with a dyson etc, the electricity trips. The breaker is only 6 amps. Is this the normal ampage for this type of breaker, and if so what vac could i use, that is less than 1250 watts. also what do you use to clean/shine the plastic strips on the front edge of the stairs?