(1) Within the enclosure the insulating material of all electric cables, including those leading to illuminating lamps, shall be covered with fire-resisting material. If the electric pressure to the cabin exceeds 125 volts, all cables inside the cabin shall be enclosed in screwed metal conduits connected to the earth.
Lead covered cables shall not be used unless enclosed in such conduits.
No electric current at a higher pressure than 110 volts shall be used within the enclosure when a cinematograph apparatus is working:
1[Provided that an electric current at a pressure of 230 volts may be used in a cinema, if special precautions to be decided by the Electric Inspector have been undertaken under his directions. This proviso shall apply to those equipments which have been in operation prior to the coming into force of these rules.]
(2) The cables for the cinematograph machine shall be taken as a separate circuit from the source of supply and from the supply side of the main fuses in the general lighting circuit on the premises and there shall be efficient switches and fuses inserted at the point where the supply taken and in addition an efficient double pole switch shall be fitted in the cinematograph lamp circuit inside the enclosure.
(3) Resistance frames shall be entirely of fire resisting material and shall be so constructed and maintained that no coil or other part shall at any time become unduly heated. All resistance with the exception of resistance for regulating purposes shall be placed outside the enclosure and if reasonably practicable outside the auditorium if inside the auditorium they shall be adequately protected by a wire guard or other efficient .means of preventing accident contract. They shall not be permitted to become so heated that a piece of dry newspaper placed in contract with any part of resistance would readily ignite.