CO882-(8-9) — Page 399

PUBLIC RECORD OFFICE

Reference

LcO, 882

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9 PUBLIC RECORD OFFICE, LONDON

ALLY WITHOUT PERMISSION OF THE BE REPRODUCED PHOTOGRAPHIC- COPYRIGHT PHOTOGRAPH-NOT TO

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or circuit- breakers.

27. A suitable safety fuse or other automatic circuit Main fuses breaker shall be inserted in each service line within a consumer's premises as close as possible to the point of entry, and contained within a suitable locked or sealed receptacle of fireproof construction, except in cases where the service line is protected by fuses in a street box; but no tuse or automatic circuit-breaker shall be inserted in the intermediate conductor of a three-wire system.

lines and apparatus

28. All service lines and apparatus placed on a con- Treatment sumer's premises shall be highly insulated and thoroughly of service protected against injury to the insulation or access of moisture, and any metal forming part of the electric on con- circuit, shall not unless efficiently connected with earth be sumer's

All electric lines shall premises, exposed so that it can be touched.

be so fixed and protected as to prevent the possibility of electrical discharge to any adjacent metallic substance.

and high pressure apparatus

29. Where the general supply of energy is a high Trans- pressure supply, and transforming apparatus is installed formers on a consumer's premises, the whole of the high pressure service lines, conductors, and apparatus, including the transforming apparatus itself, so far as they are on the to be consumer's premises, shall be completely enclosed in solid enclosed in walls, or in strong metal casing efficiently connected with metal, &c. earth and securely fastened throughout.

30. The company shall not connect a consumer's wires Connec

consumer's with their mains unless they are reasonably satisfied that tion to

premises the connection would not cause a leakage from those wires or fittings exceeding one ten-thousandth part of the not to be maximum supply current to the premises; and where the made

Leakage company decline to make such connection they shall serve

result. upon the consumer a notice stating their reasons for so would declining.

where

31. If the company are reasonably satisfied, after Discon-

Hupply on making all proper examination by testing or otherwise, tinuance of that a leakage exists at some part of a consuiner's wires or discovery fittings of such extent as to be a source of danger, any of leakage officer of the company, duly authorised by them in on con-

premises. writing, may, for the purpose of discovering whether the sumer's leakage exists at any part of a circuit within or upon any consumer's premises, by notice require the consumer at some reasonable time after the service of the notice to permit him to inspect and test the wires and fittings belonging to the consumer and forming part of the circuit.

If on any such testing the officer discovers a leakage from the consumer's wires exceeding one ten-thousandth part of the maximum supply current to the premises, or if the consumer does not give all due facilities for inspection and testing, the company shall forthwith discontinue the supply of energy to the premises in question, giving immediate notice of the discontinuance to the consumer, and shall not recommence the supply until they are reason. ably satisfied that the leakage has been removed.

Director of Public

32. If any consumer is dissatisfied with the action of Appeal to the company in refusing to give, or in discontinuing or in not recommencing the supply of energy to his premises, Works. the wires and fittings of that consumer shall, on his application and on payment of a fee of dollars. be tested for the existence of leakage by the Director of Public Works.

Height

from ground.

Arc lamps

to be guarded.

Conneo-

tion with earth of

a three- wire

system.

Connection

of other oircuite

11

This regulation shall be endorsed on every notice given under the provisions of either of the two last preceding regulations.

Arc Lighting.

33. Arc lamps used in any street for public lighting shall be so fixed as not to be in any part at a less height than 10 feet from the ground.

34. All arc lamps shall be so guarded as to prevent pieces of ignited carbon or broken glass falling from them, and shall not be used in situations where there is any danger of the presence of explosive dust or gas.

Connection of Circuits with Earth.

35. Where the pressure of a supply between the adjacent conductors of a three-wire system of mains exceeds 125 volts, the intermediate conductor shall be connected with earth in accordance with the following conditions :--

(a) The connection with earth of the intermediate conductor shall be made at one point only on each distinct circuit, namely, at the generating station, sub-station, or transformer, and the insulation of the circuit shall be efficiently maintained at all other parts.

(6.) The current from the intermediate conductor to earth shall be continuously recorded, and if it at any time exceed one-thousandth part of the maximum supply current, steps shall be imme- diately taken to improve the insulation of the system.

36. The company shall not connect any other circuit with earth except with the approval of the Director of with earth. Public Works and subject to such conditions as he may

prescribe.

Extra High Pressure.

Special 37.-(1) This regulation shall have effect in the case Regula-

of a supply at extra high pressure and shall be in addition tions as to

to and not in substitution for the obligations imposed by extra high

the foregoing regulations.

pressure.

(8) An extra high pressure main shall not be brought into use unless, after it has been placed in position and before it is used for the purposes of supply, the insulation of every part thereof has withstood the continuona application, during half-an-hour, of pressure exceeding the maximum pressure to which it is intended to be subjected in use, that is to say-in the case of every electric line to be used for a pressure not exceeding 10,000 volts twice the said maximum pressure, and in the case of a line to be used for a pressure exceeding 10,000 volts, a pressure exceeding the said maximum pressure by 10,000 volts: and the company shall record the results of the tests of each main or section of a main.

(3) Every extra high pressure main shall be protected by a suitable fuse or automatic circuit-breaker, but in the case of a concentric main that fuse or circuit-breaker shall not be inserted in any external conductor thereof which is connected with earth.

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