Aug. 3.

THE NEW ZEALAND GAZETTE.

2439

cables because of the impracticability of crossing above or
below (and crossing above or below shall be done if pos-
sible), all such through crossings, if permitted, shall be
effected at a pole. In every case of a through crossing, no
matter whose property the lines crossed through may be,
the method of carrying the electric-light wires across the
pole, protecting them thereon, protecting 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. The electric-
light wires shall be insulated with not less than 300-
megohms-per-mile grade of vulcanized rubber where they
pass through on the poles, and over the whole length of
the span on each side of the pole crossed through. Where
the insulated wires cross through on the pole they shall be
incased in some hard protecting substance for the entire
length of the arms on such pole. If metal pipe be used to
incase the wires it shall be effectively earthed.

10. In running these lines through streets where no tele-
    graph lines exist, the Corporation shall keep to one side of
    the street, and in running service wires to the opposite
    side of the street to that on which their line of poles is
    placed the Corporation shall arrange to supply so as to
    interfere as little as possible with the route on that side
    of the street.

11. Except by permission of the Minister of Telegraphs,
    all overhead electric-light pole lines shall be placed on the
    opposite side of the streets to that on which any telegraph-
    pole lines exist; and where the erection of the electric-
    light wires necessitates the alteration of telegraph-wires
    that may exist when the electric-light wires are being run,
    and such alteration is practicable, the expense of the alter-
    ation shall be borne by the Corporation.

12. 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 each to the other side of the
    street, each party shall give the other reasonable facilities
    as far as possible to effect supply.

13. Where it cannot be arranged otherwise, and there is
    room on the telegraph-poles, and other circumstances do
    not render it unsafe or impracticable, the electric-light
    wires may be run along on the telegraph-poles, subject to
    their insulation being not less than 300-megohms-per-mile
    grade of vulcanized rubber, and to any special conditions
    that it may be found necessary to impose at the time that
    the placing of such electric-light wires on the telegraph-
    poles is being considered.

14. When the electric-light-pole lines are being laid out
    provision should be made by increased length of pole to
    provide clearance to facilitate crossing with telegraph
    service wires to the side of the street occupied by the Cor-
    poration's lines.

15. Telegraph-wires shall not be run along or placed on
    the Corporation's poles, nor shall the Corporation's wires
    be run along or placed on telegraph-poles, without a special
    understanding of requirements and precautions to be ob-
    served being arrived at between a responsible officer of the
    Corporation and of the Minister of Telegraphs in respect
    of each case. Rental at a rate to be agreed upon may be
    charged for the use of poles, but nothing in this license
    shall be construed to give any party a right to the use of
    poles other than its own.

16. Every main shall be tested for insulation after having
    been placed in position and before it is used for the pur-
    poses of supply, the testing-pressure being at least 220
    volts, and the Corporation shall duly record the results of
    the tests of each main or section of a main.

17. The insulation of every complete aerial and under-
    ground 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-cur-
    rent. Every leakage shall be remedied without delay.
    Every such circuit shall be tested for insulation at least
    once in every week, and the Corporation shall duly record
    the results of the tests.

18. The sectional area of the conductor in any electric
    line laid or erected in any street shall not be less than that
    of a strand of seven wires, each of which is of No. 20
    standard wire gauge, and the sectional area of every wire
    in a strand forming any such conductor shall not be less
    than that gauge.

19. All material used for insulating electric lines or
    apparatus shall be of the best quality, and thoroughly dur-
    able and efficient, having regard to the conditions of its use.
    Suitable provision shall be made for the protection of the
    insulating material against injury or removal. If the pro-
    tection so provided be wholly or partly metallic it shall be
    efficiently connected with earth.

20. All metal pipes or covering 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.

21. 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.

22. The variation of pressure at any consumer's terminals
    shall not under any conditions of the supply which the
    consumer is entitled to receive exceed 4 per cent. from the
    normal pressure at which he is being supplied.

23. Every aerial line shall be attached to supports at
    intervals not exceeding 200 ft. where the direction of the
    line is straight, or 150 ft. where the direction is curved or
    where the line makes a horizontal angle at the point of
    support.

24. Every support for an aerial line shall be of a durable
    material, and properly stayed against forces due to wind
    pressure, change of direction of the line, or unequal lengths
    of span. The factor of safety shall be for all aerial lines
    and suspending wires, and for all other parts of the struc-
    ture, at least 6, taking the maximum possible wind pressure
    at 20 lb. per square foot. Earth-wires where led down poles
    shall be protected by casing for a distance of 8 ft. from the
    ground.

25. All aerial wires shall be attached to suitable insu-
    lators 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 covered with insulating material shall be so
    attached that their insulation will not be impaired where
    they are secured to the insulator.

26. Any aerial wire shall not in any part thereof be at
    a less height from the ground than 18 ft., or 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 pur-
    pose of supply. Where the wires cross the railway-line the
    minimum height of all shall be 18 ft., unless the Railway
    Department requires a greater height, and the permission
    of that Department shall be obtained by the Corporation
    for every such crossing.

27. Service lines from aerial lines shall be led as directly
    as possible to insulators firmly attached to some portion of
    the consumer's premises which is not accessible to any
    person without the use of a ladder or any other special
    appliance. Every portion of any service line which is out-
    side a building and is within 7 ft. from any part of the
    building shall be rubber-insulated.

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

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

30. Efficient guard-wires shall be erected in a manner to
    meet with the approval of the Minister of Telegraphs at
    all crossings and places where electric-light wires intersect
    telegraph or other wires, as may be required by the Minis-
    ter to be so protected. The Corporation shall bear the
    expense of such guard-wires in all cases where an electric-
    light wire intersects a telegraph or other wire previously
    existing.

31. Every aerial line, including its supports, its conduc-
    tors, and their insulating covering, and all the structural
    parts and electrical appliances and devices belonging to or
    connected with the line, shall be duly and efficiently super-
    vised and maintained as regards both electrical and me-
    chanical conditions.

32. An aerial line shall not be permitted to remain erected
    after it has ceased to be used for the supply of energy,
    unless the Corporation intends within a reasonable time
    again to take it into use.

33. The electric-light wires may be placed wholly under-
    ground, or partly underground and partly overhead.

34. All conduits, pipes, casings, and street boxes used as
    receptacles for electric lines shall be constructed of durable
    material, and shall be of ample strength to prevent damage
    from heavy traffic, and reasonable means shall be taken to
    prevent the accumulation of gas in such receptacles.

35. Where any underground line crosses or is in proxi-
    mity to any metallic substance, special precautions shall be
    taken against the possibility of any electrical charging of
    the metallic substance from the line, or from any metallic
    conduit, pipe, or casing enclosing the line.

36. All underground metal conduits, pipes, or casings
    containing an electric line shall be efficiently earthed, and
    shall be so jointed and connected across all street boxes