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
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They shut off the main electrical supply for the area because water is a good conductor of water and due to which the circuit will catch the fire and give the support to the fire
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In case of a fire, before the firemen use the water hoses, they shut off the main electrical supply for the area because water sprayed from the hose might conduct electricity which may come in contact with the electrical appliances which increases the chance of electricity passing through wire. This may hurt fire man.
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