remote switching

I've got an ac/dc power supply on a Plc that is a class one 24 volt power supply , my doors are to be powered by a class two power supply only , the fuses powering my doors would prevent my doors from ever exceeding class two va requirements . I have class two plenum cable pulled . The company...

Hi there!! I am an electrical contractor from South-Africa. I have a client that recently installed a 19kva three phase 380/220v back-up generator, on the main feed to his property. The property exists out of one large house and 11 flats. On the property there are 11 stoves and 7 water heaters...