1994
Introduc-
tion of three-wire
system into consumers' premises.
Minimum
size of conductors.
No. 18 of 1911.
ELECTRICITY SUPPLY.
(2) the supply to every arc lamp shall be controlled by means of an efficient cut-off switch, placed in such a position as to be easily handled by the person in charge of the arc lighting, and connected so that by its means all pressure can be cut off from the arc lamp itself, and from any regulating switch, resistance or other device in connection therewith. Provided that where the arc lamps are connected in series across the outer conductors of a three-wire system, it shall be sufficient if one such switch be provided for each series of arc lamps;
(3) switches, efficient fuses or other automatic cut-outs shall be provided, so as to protect the circuits from excess of current, and all switches and cut-outs shall be so enclosed and protected that there shall be no danger of any shock being obtained in the ordinary handling thereof, or of any fire being caused by their normal or abnormal action.
(c) Where the supply is for incandescent lamps in series, unless the Director of Public Works otherwise allows,—
(1) the consumer's wires forming the connections to the incandescent lamps, or otherwise in connection with the supply, shall be completely enclosed in strong metal casing, and this casing together with the switches and lamp holders, if metallic, shall be efficiently connected with earth;
(2) switches, efficient fuses or other automatic cut-outs shall be provided, so as to protect the circuits from excess of current, and all switches and cut-outs shall be so enclosed and protected that there shall be no danger of any shock being obtained in the ordinary handling thereof, or of any fire being caused by their normal action.
Where the supply is for any special purpose other than those above-mentioned, or where the pressure of the supply exceeds the limits of medium pressure it shall be subject to such other regulations as the Governor-in-Council may prescribe.
3. When the pressure between the outer conductors of a three-wire system exceeds 250 volts and the three wires of the system or two pairs of wires are brought into a consumer's premises, the supply shall be given to two pairs of terminals arranged in such a manner that there shall be no danger of any shock, and the wiring from those terminals shall be kept distinct.
4. The sectional area of the conductor in any electric line other than low tension laid or erected in any street after the date of these Regulations shall not be less than that of a strand of 7 wires, each of which is of No. 22 standard wire gauge, and the sectional area of every wire in a strand forming any such conductor shall not be less than that gauge, and where such stranded conductor is erected it shall be suspended from a suitable bearer wire. In the case of low tension conductors in any electric line the sectional area shall not be less than that of a single wire of No. 16 standard wire gauge efficiently insulated.
This regulation shall not apply in the case of an electric line placed in a lamp-post.
Page 5
Page 6