Question

explain why a firemen shut off the main electric supply before he use water hose​

Answer 1

Water being a good conductor of electric current is capable of conducting electricity causing electric shock. Therefore, to save themselves and other people from electrocution the firemen shut off the main electrical supply.

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Answer 2

Answer:

Water being a good conductor of electric current is capable of conducting electricity causing electric shock. Therefore, to save themselves and other people from electrocution the firemen shut off the main electrical supply.