In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area. Explain why they do this.
Water may also behavior power. If the electric deliver for the vicinity isn't close off and water is poured over electric appliances, then energy can also additionally byskip thru water and damage the firemen. That is why, in case of a fire, the firemen close off the primary electric deliver for the region earlier than they use the water hoses.
