170

THE NEW ZEALAND GAZETTE.

[No. 4

Authorizing the Thames Borough Council to erect Electric Lines within the Thames Borough and Thames County.

LIVERPOOL, Governor.
ORDER IN COUNCIL.

At the Government House, at Wellington, this twentieth day of January, 1913.

Present:

His Excellency The Governor In Council.

WHEREAS by section two of the Public Works Amendment Act, 1911, it is provided that no person shall lay, construct, put up, place, or use any electric line except under the authority of a license issued to him by the Governor in Council under that Act:

And whereas the Thames Borough Council (hereinafter referred to as "the said Council") desires to erect electric lines for lighting and power purposes partly within the Thames Borough and partly within the Thames County : And whereas the Thames County Council has, subject to certain conditions, consented to the erection of such lines by the said Borough Council within the county: And whereas it is expedient accordingly to issue a license in respect of the said lines 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 that 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 and license the said Council to erect, construct, lay down, and maintain electric lines for lighting and power purposes within the Thames Borough and Thames County, in the areas coloured blue and brown and shown on the plan marked P.W.D. 32781, deposited in the office of the Minister of Public Works, at Wellington, in the Wellington Provincial District.

SCHEDULE.

CONDITIONS.

1. In the following conditions—
   "Consumer's wires" means any electric line on a consumer's premises which is connected with the service lines of the said Council:
   "Inspecting Engineer" means the Engineer or other officer appointed by the Minister for the purpose of inspecting the works to be constructed or maintained by the said Council:
   "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:
   "Minister" means the Minister of Public Works: "Telegraph" includes telephone.
   Any metallic body to be "efficiently connected with earth" shall be connected with the general mass of the earth in such manner as will ensure at all times an immediate and safe discharge of electrical energy.

2. The supply of electrical energy shall be given to private consumers by means of direct current on the two- or three-wire system at a pressure of 230 volts effective between each of the outer wires and the neutral, and 460 volts between the two outer wires. The declared voltage at the consumer's terminals shall be 230 and 460 volts respectively.

3. The neutral wire shall be efficiently insulated throughout its length, and shall be earthed only at the power-station. The earth connection shall be provided with a switch for cutting off the earth connection for testing, and with a recording-ammeter of a suitable range.

4. The main switchboard shall be made of and be mounted on material that is not inflammable.

5. Except where otherwise provided, the overhead conductors may be of bare hard-drawn copper or aluminium wire. If at any time it is found detrimental to the public safety to have these wires bare, the Minister may require the said Council to have them insulated, and they shall thereupon be insulated accordingly. No electric-light wire shall come within 3 ft. of any other class of aerial wires or of cables, except where it may be permitted to pass the electric-light wires through such other wires or cables at a pole.

6. Where lead-covered telephone cables or any bare telegraph or other aerial wires are crossed above or beneath by the electric-light wires, the latter wires shall be covered with triplex weatherproof compounded braiding throughout the crossing-span, and over every such span they shall, if the Minister of Telegraphs so requires, be suitably suspended from effectively earthed steel bearer-wires.

7. In places where it may be required to cross with the electric-light wires through any other aerial wires or through cables, all such through crossings, if permitted, shall be effected at a pole. In every case of a through crossing with telegraph wires or cables, the method of carrying the electric-light wires across the pole, protecting them thereon, preventing other wires from coming into contact with them, and protecting persons working on the poles from danger of shock, shall be to the satisfaction of the Minister of Telegraphs. Where the covered wires cross through on the pole, they shall be encased in a protecting tube for the entire length of the arms on such pole.

8. Efficient guard-wires shall, if so required by the Minister of Telegraphs or the Minister, be erected in a manner to meet with the approval of either one Minister or the other, or both, as the case may require, at all crossings and places where the electric-light wires intersect telegraph or other wires. The said Council shall bear the expense of such guard-wires in all cases where an electric-light wire intersects a telegraph or other wire previously existing.

9. In running the lines authorized by this license through streets where no telegraph lines exist the said Council shall keep to one side of the street, and in running service wires to the opposite side of the street the Council shall arrange so as to interfere as little as possible with the route of any future telegraph line.

10. Except by permission of the Minister, all overhead electric-light pole lines shall be placed on the opposite side of any street to that on which any telegraph pole lines exist ; and where the erection of the electric-light wires necessitates the alteration of any existing telegraph wires, and such alteration is approved by the Minister of Telegraphs, the expense of the alteration shall be borne by the said Council.

11. Where the electric-light wires are on one side of a street and the telegraph wires are on the other, and service is required to be given from either to the other side of the street, the said Council and the Minister of Telegraphs shall give to each other reasonable facilities as far as possible to effect supply.

12. Every main shall be tested for insulation after having been placed in position and before it is used for the purposes of supply, the testing pressure being at least 500 volts, and the said Council shall duly record the results of the tests of each main or section of a main, and forthwith forward a report thereof to the District Engineer at Auckland.

13. The insulation of every complete circuit used for the supply of energy, including all machinery, apparatus, and devices forming part of or in connection with such circuit, shall be so maintained that the leakage current shall not under any conditions exceed one-thousandth part of the maximum supply current. Every leakage shall be remedied without delay. Every such circuit shall be tested for insulation at least once in every week, and the said Council shall duly record the results of the tests, and forward a report thereof at the end of each week to the District Engineer at Auckland.

14. The sectional area of the conductor (other than a pilot wire) in any electric line laid or erected in any street shall not be less than 7/18, standard wire-gauge.

15. All metal pipes or coverings containing any electric wire shall be efficiently connected with earth, and shall be so jointed as to make good electrical connection throughout their whole length

16. 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 ft. from the ground. 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.

17. The variation of pressure at any consumer's terminals shall not exceed 4 per cent. above or below the normal pressure at which he is being supplied.

18. Every support for an aerial line shall be of durable material, and properly strengthened against forces due to wind-pressure, change of direction of line, and unequal length of span. The factor of safety of such supports shall be at least four, taking into consideration all possible stresses, including wind-pressure at 30 lb. per square foot on plane surfaces and 18 lb. per square foot of diametrical plane for cylindrical surfaces. The stress in aerial conductors shall not exceed 28,000 lb. per square inch for copper and 15,000 lb. per square inch for aluminium in the extreme case of a temperature of 12° Fahr., and a wind-pressure of 18 lb. per square foot of diametrical plane occurring simultaneously.

19. Earth-wires, where led down poles, shall be protected by casing for a distance of 8 ft. from the ground.

20. All aerial wires shall be attached to suitable insulators carried on cross-arms of suitable material and cross-section, and they shall be so attached to the insulators or guarded that they cannot fall away from the support. Conductors