What is the role of insulation with a capacitor

A capacitor consists of two metalling plates that are able to accumulate charge. When the capacitor is connected to a voltage  source, the two plates start to accumulate electric charge (one plate positive, one plate negative). As a result, an electric field forms in the gap between the two plates.

when the use of electricity burdens the fuse and miniarure circuit beakers and there is a possibility of a fuse then they automatically cut off the electricity supply to your homes and after you fix the problem u jzt switch it on and it continues the supply of electricity to ur homes