Electricity Supply.
[CAP. 103
height of
(13) The height from the ground of any line conductor Minimum (other than a service line), earth wire or auxiliary conductor conductors at any point of the span at a temperature of 160° F. shall not, except with the consent of the Director of Public Works, be less than 19 feet across a public road or 17 feet in other positions. A height of 15 feet may be adopted in situations inaccessible to vehicular traffic.
Where a service line is carried across or along a carriage-way, the height of the line from the ground at any part of the carriage-way shall not, except with the consent of the Director of Public Works, be less than 19 feet and 17 feet respectively.
to prevent
(14) Where the voltage to earth exceeds 250 volts direct Provision current or 125 volts alternating current, precaution should danger. be taken to prevent danger,
(I) from a broken line conductor by the provision of-
(a) a neutral or earthed conductor carried continuously from pole to pole, and so arranged in relation to the other conductors that in the event of breakage of any one of them the line conductor shall make contact with the earthed wire; or
(b) other means approved by the Director of Public Works;
(II) from leakage by the provision-
(a) in cases where metal poles are used, of—
(i) an earthed wire, running from pole to pole and connected to the poles; or
(ii) a suitable metal framework to support the insulators carrying the line conductors, the framework being insulated from the pole but connected to the neutral conductor; or
(iii) other means approved by the Director of Public Works;
(b) in cases where wooden poles are used, of-
(i) a bonding wire connected to the supporting metal work of all insulators, the bonding wire terminating at the lowest part of the supporting metal work; or
(ii) other means approved by the Director of Public Works.
185