Science
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.
Electric Current Chemical Effects
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Answer
Water from hoses contain salts which makes the water conducting and when that conducting water is sprayed in order to stop the fire, it might result in spread of electric current if water is spilled over electrical switches. Hence, firemen shut off the main electrical supply for the area under fire.
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