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A bank of batteries with capability of supplying 250A and a maximum voltage of 325V...

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A bank of batteries with capability of supplying 250A and a maximum voltage of 325V is housed in a concrete structure in a very humid location. There is service access alsie between rows of batteries. What is the REQUIRED safety distance between the rows of batteries.

A.

3 ft. when insulted conducted conductors are used between terminals.

B.

3-1/2 If the building is equipped with a dehumidifier and the batteries are on insulting surfaces

C.

4 ft Whether or not the building is equipped with a dehumidifier or the batteries are insulting surfaces

D.

6 ft. When the floor is insulated and no dehumidifier is installed.

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