1984 Ed.]
Electricity Supply Regulations
[CAP. 103
21. A high pressure electric line shall not, except with the consent of the Director of Electrical and Mechanical Services, be used for the supply of energy before it has been completely laid, properly jointed, examined and tested, or until it is in the sole charge of the company, and every such line shall during its use be in the sole charge of the company.
SUB-STATIONS AND STREET BOXES
22. Sub-stations shall be established in suitable places and shall be in the sole occupation and charge of the company. Sub-stations shall be erected above ground wherever possible, but where necessarily underground, due provision shall be made for ventilation and for drainage.
A 13
[Subsidiary]
Completion and control of high pressure lines. LX. 76/82 L.N. 298/82.
Sub-stations.
23. In addition to the provisions contained in regulation 15 as to the construction of receptacles for electric lines, the following conditions shall be observed with respect to street boxes--
(a) the covers of all street boxes shall be so secured that they cannot be opened except by means of a special appliance:
(b) the covers of all street boxes containing high pressure apparatus other than cables shall be connected to strips of metal laid immediately underneath the street, and efficient means shall be taken to render it impossible that the covers or other exposed parts of these boxes, or any adjacent material forming the surface of the street, shall become electrically charged, whether by reason of leakage, defect or otherwise;
(c) where street boxes are used as transformer chambers, reasonable means shall be taken to prevent as far as possible any influx of water, either from the adjacent soil or by means of pipes; and in the case of any such street box exceeding 1 cubic yard in capacity, ample provision shall be made, by ventilation or otherwise, for the immediate escape of any gas which may by accident have obtained access to the box, and for the prevention of danger from sparking;
(d) all street boxes shall be regularly inspected for the presence of gas, and if any influx or accumulation is discovered the company shall give immediate notice to the company whose gas mains are laid in the neighbourhood of the street box:
(e) where mains at different pressures pass through the same street box they shall be readily distinguishable from one another.
24. The maximum power supplied to any underground sub-station or street box shall not, without the consent of the Director of Electrical and Mechanical Services, exceed 30 kilowatts in the case of a sub-station or street box containing a single transformer, or 75 kilowatts in the case of a sub-station or street box containing 2 or more transformers.
Maximum power in case of underground sub-station, etc.
LX. 76/82. L.N. 298/82.