Jan. 14.] THE NEW ZEALAND GAZETTE. 145

And whereas Frederick James Mansell (hereinafter referred to as “the licensee”) desires to erect electric lines in the Town District of Bull’s within a two-mile radius of the post-office at Bull’s (hereinafter referred to as “the area of supply”), and it is expedient accordingly to issue a license in respect thereof under the said section:

Now, therefore, in pursuance and exercise of the powers conferred on him by the said section, and of all other powers in anywise enabling him in this behalf, His Excellency the Governor of the Dominion of New Zealand, acting by and with the advice and consent of the Executive Council of the said Dominion, doth, subject to the conditions set forth in the Schedule hereto, hereby authorize the licensee to erect and maintain, for lighting, heating, and power purposes within the said area of supply, the electric lines indicated by green lines on the plan marked P.W.D. 35959, deposited in the office of the Minister of Public Works at Wellington, in the Wellington Provincial District, and such further lines as may from time to time be required within the said area of supply.

SCHEDULE.

1. In the following conditions—

“Consumer’s wires” means any electric lines on the consumer’s premises which are connected with the licensee’s electric lines.

“Distribution line or lines” means the portion of any line from which service wires are connected for the purpose of supplying consumers.

“Earthed” applied to any conductor means that such conductor shall be so connected to the general mass of earth as to ensure at all times an immediate and safe discharge to earth of electric energy.

“Electric line” means any wire, wires, conductor, or other means used for conveying, transmitting, or distributing electricity for power, lighting, or heating purposes, and includes any instrument, insulator, casing, tubing, pipe, covering, or post enclosing or supporting an electric line or anything connected therewith.

“Inspecting Engineer” means and includes an Inspecting Engineer appointed by the Minister to inspect works to be constructed or maintained by virtue of any electric-line licenses, or any water-power licenses, or any combined water-power and electric-line licenses issued under the Public Works Act, 1908, and any or all of its amendments, or under any one or more of such amendments only, or any Act or Acts passed in amendment thereof or substitution therefor.

“Low pressure” means pressures up to 650 volts.

“Minister” means the Minister of Public Works.

“Pressure” means difference of electric potential between any two conductors through which supply of energy is given, or between any part of either conductor and the earth.

“Street” includes road.

“Telegraph” includes telephone.

“Telegraph line” has the same meaning as “electric line” in the Post and Telegraph Act, 1908.

SYSTEM OF SUPPLY.

2. The supply of electrical energy shall be given by direct current on the two-wire system with a difference of potential of 230 volts, or on the three-wire system with a difference of potential of 460 volts between the outer conductors.

CONNECTIONS OF SERVICE WITH EARTH.

3. The connection with earth of the intermediate conductor of the three-wire system shall be made at one point only—namely, at the generating station—and the insulation of the circuit, except at that point, shall be efficiently maintained at all other parts. A switch or link shall be provided for disconnecting the earth connection for testing.

The current from the intermediate conductor to earth shall be continuously recorded by a recording ammeter, and if it at any time exceeds one-thousandth part of the maximum supply current steps shall be immediately taken to improve the insulation of the system.

CONDITIONS OF SUPPLY.

4. For purposes of supplying lighting to private consumers the pressure shall not exceed 230 volts at the consumers’ terminals, and for distribution to motors in factories and workshops the voltage of supply shall not exceed 460 volts at the consumers’ terminals.

REGULATION OF PRESSURE.

5. The pressure shall be maintained within 4 per cent. on lighting-distributing circuits above or below the declared pressure at the consumers’ terminals. The licensee shall supply a suitable recording voltmeter for this service, and on complaint by any consumer that the variations in voltage exceed these limits, or on the instructions of the Inspecting Engineer, the licensee shall connect a recording voltmeter to record the pressure between the lines at their entrance to the consumers’ premises, and shall supply to the Inspecting Engineer a chart showing the variations in voltage between the lines at this point for a period of seven consecutive days. If the variations thus recorded exceed the above limits, the licensee shall take immediate steps to comply with this regulation. If after thirty days a similar chart shows that the above limits of variation in voltage are not complied with, a breach of these regulations shall be deemed to have been committed. If the accuracy of the licensee’s recording voltmeter is questioned by the consumer, a standard instrument shall be supplied by the Inspecting Engineer, the reading of which shall be accepted as final.

SWITCHBOARDS.

6. All switchboards shall be made of and mounted on material that is not inflammable, and the maximum permissible current in any conductor mounted thereon or leading thereto shall not exceed the values permitted under the Rules of the Institution of Electrical Engineers of Great Britain.

Every switch intended to be used for breaking a circuit, and every circuit-breaker, shall be so constructed or arranged that it cannot with proper care be left in partial contact or accidentally fall or move into contact when left out of contact.

All switchboard circuits shall be so arranged that the course of any conductor may be readily identified.

Adequate means of access, free from danger, shall be provided for every switchboard passage-way; and the following provisions shall apply to all switchboard working-platforms and passage-ways, unless the bare conductors, whether overhead or at the sides of the passage-ways, are otherwise adequately protected against danger by divisions or screens or other suitable means:—

(a.) Passage-ways constructed for low-tension switchboards shall have an overhead clearance of 7 ft. between the conductors and the floor, and a clear width measured from bare conductor of not less than 3 ft.

(b.) Bare conductors shall not be exposed on both sides of the switchboard passage-way unless either (1) the clear width of the passage is not less than 4 ft. 6 in., measured between bare conductors, or (2) the conductors on one side are so guarded that they cannot accidentally be touched.

Suitable means, such as rubber mats and gloves, shall be provided and used when necessary adequately to prevent danger.

CIRCUIT-BREAKERS.

7. All outgoing feeders and distributors shall be provided with automatic circuit-breakers or fuses set to open at 100 per cent. excess current over the rated full load of such feeder or distributor, with a time-limit not exceeding ten seconds.

OVERHEAD ELECTRIC LINES.

8. The diameter of any conductor in any electric line laid or erected for the supply of electrical energy shall not be less than 0·104 in. diameter (No. 12 S.W.G. or 7/20 S.W.G.). If the material of the conductor is aluminium the conductor shall be stranded.

The stress in overhead conductors shall not exceed 25,000 lb. per square inch for copper, 12,000 lb. per square inch for aluminium, 34,000 lb. per square inch for steel, and 22,500 lb. per square inch for iron in the extreme case of a temperature of 32° Fahr. and a wind-pressure of 18 lb. per square foot of diametral plane occurring simultaneously. The span between supports and the sag shall be determined to conform with the above limiting stresses.

Where an aerial line crosses a street the angle between the line and the direction of the street at the place of crossing shall not be less than 60 degrees, and the span shall be as short as possible.

Where an aerial line crosses or is in proximity to any metallic substance, precautions shall be taken by the licensee against the possibility of the line coming into contact with the metallic substance by breakage or otherwise.

No overhead low-pressure electric lines shall come within 3 ft. of any aerial wires or cables belonging to another authority, except where it may be permitted to pass either set of wires between other wires at a pole or support.

All overhead electric lines at low pressure shall be carried at a minimum height of 18 ft. above the ground.

An aerial wire shall not in any part thereof come within 5 ft., measured horizontally, or 7 ft., measured vertically, from any part of any building or erection other than a support for the line, except where brought into a building for the purpose of supply.