Interpretation
2. In these Regulations–
“apparatus” means -
(a)any luminous tube sign or other equipment of a rating exceeding 100 watts designed to operate on a voltage in excess of 1,000 volts A.C. or 1,500 volts D.C. if measured between any two conductors or 600 volts A.C. or 900 volts D.C. if measured between any conductor and earth; and
(b)any transformer required to raise the voltage of the sign or equipment;
“fireman’s emergency switch” means a switch capable of cutting off the supply of electricity to apparatus; and references to such a switch are, in a case where a transformer is provided to raise the voltage to operate apparatus, references to a switch on the low-voltage side of the transformer.