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THE HONGKONG GOVERNMENT GAZETTE, MARCH 16, 1917.
EXECUTIVE COUNCIL.
No. 91.
Regulations made by the Governor in Council under Section 3 of the Electricity Supply Ordinance, 1911, (Ordinance No. 18 of 1911), on the 15th day of March, 1917.
1. The following regulations are hereby made by the Governor in Council under Section 3 of the Electricity Supply Ordinance, 1911 :-
Definitions.
Pressure of supply to
consumers.
REGULATIONS FOR SECURING THE SAFETY OF THE PUBLIC.
Definitions.
1. In the following regulations,-
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"Consumer's wires" means any electric lines on a consumer's pre- mises which are connected with the service lines of the company at the consumer's terminals;
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'Sub-station" means any premises in which energy is transformed or converted for the purpose of supply to consumers, and which are large enough to admit the entrance of a person after the transforming or converting apparatus is in position, provided that for the purpose of those regulations any place within any such premises which is used solely for some purpose other than such transformation or conversion shall not be deemed to form part of a sub-station;
"Overhead line" means any electric line which is placed above ground and in the open air;
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"Pressure means the difference of electrical potential between any two conductors through which a supply of energy is given, or between any part of either conductor and the earth; and-
(a) where the conditions of the supply are such that the pressure at any pair of consumer's terminals does not exceed 250 volts, the supply shall be deemed a low pressure supply;
(b) where the conditions of the supply are such that the pressure exceeds 250 volts but does not exceed 650 volts, the supply shall be deemed a medium pressure supply;
(c) where the conditions of the supply are such that the pressure exceeds 650 volts but does not exceed 3,000 volts, the supply shall be deemed a high pressure supply; and
(d) where the conditions of the supply are such that the pressure exceeds 3,000 volts, the supply shall be deemed an extra high pressure supply.
Where these regulations require any metallic body to be efficiently connected with earth," it shall be connected with the general mass of earth in such manner as will ensure at all times an immediate and safe discharge of electrical energy.
General.
2. The pressure of a supply delivered to any consumer shall not exceed the limit of low pressure except for special purposes, for which a medium pressure supply may be given on the consumer undertaking to comply with the following conditions:-
(a) Where the supply is for power purposes--
(1) the frame of every electric motor shall be efficiently connected with earth;
(2) the consumer's wires forming the connections to motors, or other- wise in connection with the supply, shall be, as far as practicable, com- pletely enclosed in strong metal casing efficiently connected with earth, or they shall be fixed in such a manner that there shall be no danger of any shock;
(3) the supply to every motor 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 motor, and connected so that by its means all pressure can be cut off from the motor itself, and from any regulating switch, resistance or other device in connection therewith;