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Before firemen turn their water hoses on a building fire, they shut off the main electrical supply to that area. Why?
AElectricity stops the water from spreading
BWater reacts with the metal in wires and explodes
CWater can damage the wiring permanently
DIf live electrical wires are wet, water — being a conductor due to dissolved salts — can carry current to anyone touching it, including the firemen
Answer & Solution
Correct answer: D. If live electrical wires are wet, water — being a conductor due to dissolved salts — can carry current to anyone touching it, including the firemen
Tap water is a fairly good conductor of electricity. If live wires are flooded, the water around them and in the hose can carry current to the firemen, the public, and anything else in contact with the water. Cutting power first eliminates this hazard.
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