(3)Protection against lightning. - Protection from lightning shall be provided for -(a)buildings in which explosive highly flammable substances are manufactured, used, handled or stored:(b)storage tanks containing oils, paints or other flammable liquid;(c)grain elevators;(d)buildings, tall chimneys or stacks where flammable gases, fumes dust or lint are likely to be present; and(e)sub-station buildings and out-door transformers and switch-yards.
