1942
[Schedule
contd.]
Electric
continuity of metal conduits, etc. of high pressure line.
Precautions to be taken when bare conductors are used.
High pressure lines laid above ground or in subways.
Protection
for surface of ground and electric lines.
Completion and control
of high pressure lines.
Sub-stations.
Street boxes.
No. 18 of 1911.
ELECTRICITY SUPPLY.
17. All metal conduits, pipes, or casings containing any high pressure electric line shall be efficiently connected with earth, and shall be so jointed and connected across all street boxes and other openings as to make good electrical connexion throughout their whole length.
18. Where the conductors of electric lines placed in any conduit are not continuously covered with insulating material, they shall be secured in position, and no unfixed uninsulated material of a conducting nature shall be contained in the conduit. No such conductor shall be at a pressure exceeding 300 volts from earth.
Adequate precautions shall also be taken to ensure that no accumulation of water shall take place in any part of the conduit, and to prevent any dangerous access of moisture to the conductors or the insulators.
The insulators of any such electric line shall be so disposed that they can be readily inspected; but this requirement shall not apply to any such insulators which before the date of these regulations were not required by any regulation then in force to be so capable of ready inspection.
19. Every portion of any high pressure electric line placed above the surface of the ground, or in any subway not in the sole occupation of the company, shall be completely enclosed either in a tube of highly insulating material embedded in brickwork, masonry, or cement-concrete, or in strong metal casing efficiently connected with earth.
20. Where any high pressure electric line is laid beneath the surface of the ground, efficient means shall be taken to render it impossible that the surface of the ground or any neighbouring electric line or conductor shall become charged by leakage from the high pressure electric line.
21. A high pressure electric line shall not, except with the consent of the Director of Public Works, 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.
23. In addition to the provisions contained in regulation 15 of these regulations as to the construction of receptacles for electric lines, the following conditions shall be observed with respect to street boxes :-
(1) the covers of all street boxes shall be so secured that they cannot be opened except by means of a special appliance;
(2) 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.
1942
[Schedule
contd.]
Electric
continuity of metal conduits, etc. of high pres- sure line.
Precautions to be taken when bare conductors are usod.
High pres- sure lines laid above ground or in subways.
Protection
for surface of ground and electric lines.
Completion and control
of high pres-
sure lines.
Sub-stations.
Street boxes.
No. 18 of 1911.
ELECTRICITY SUPPLY.
17. All metal conduits, pipes, or casings containing any high pressure electric line shall be efficiently connected with earth, and shall be so jointed and connected across all street boxes and other openings as to make good electrical connexion throughout their whole length,
18. Where the conductors of electric lines placed in any conduit are not continuously covered with insulating material, they shall bo secured in position, and no unfixed uninsulated material of a conducting nature shall be contained in the conduit. No such conductor shall be at a pressure exceeding 300 volts from earth.
Adequate precautions shall also be taken to ensure that no accumulation of water shall take place in any part of the conduit, and to prevent any dangerous access of moisture to the conductors or the insulators,
The insulators of any such electric line shall be so disposed that they can be readily inspected; but this requirement shall not apply to any such insulators which before the date of these regulations were not required by any regulation then in force to be so capable of ready inspection.
19. Every portion of any high pressure electric line placed above the surface of the ground, or in any subway not in the sole occupation of the company, shall be completely inclosed either in a tube of highly insulating material embedded in brickwork, masonry, or cement-concrete, or in strong metal casing efficiently connected with earth.
20. Where any high pressure electric line is laid beneath the surface of the ground, efficient means shall be taken to render it impossible that the surface of the ground or any neighbouring electric line or conductor shall become charged by leakage from the high pressure electric line.
21. A high pressure electric line shall not, except with the consent of the Director of Public Works, 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¶n the sole occupation and charge of the company. Sub-stations shall be erected above ground wherever possible, but where necessarily under- ground, due provision shall be made for ventilation and for drainage.
23. In addition to the provisions contained in regulation 15 of these regulations as to the construction of receptacles for electric lines, the following conditions shall be observed with respect to strect boxes :-
(1) the covers of all street boxes shall be so secured that they cannot be opened except by means of a special appliance ;
(2) 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
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