2366
THE NEW ZEALAND GAZETTE.
[No. 48

to pass, and a passage-way in front of the switch-
board with at least 3 ft. 6 in. horizontal clearance
from the face of the switchboard.
(c) In screened spaces where only skilled men would be
employed when the switchboard is alive (unless all
live metal other than that being worked on is suitably
screened)—
(i) An overhead clearance of not less than 7 ft.
from the floor to any bare conductor under which it
is necessary to pass.
(ii) A horizontal clearance of not less than 6 ft.
for high or extra-high pressure and not less than 4 ft.
for medium or lower pressures where it is possible
to pass between any live conductors less than 7 ft.
above the floor.
(iii) A horizontal clearance of not less than 3 ft.
between any live conductor less than 7 ft. above the
floor and any wall, screen, or other similar object.
(iv) For all voltages in excess of 11,000 volts such
clearances as are approved by the Chief Electrical
Engineer of the Public Works Department.
(2) When a passage-way is provided behind any switch-
board the horizontal clearance shall be the same as that
specified for the front of board, and shall be measured from
any screen erected at the back of the switchboard.
65. (1) Every passage-way and enclosed space shall have a
firm and even floor.
(2) Adequate means of access, free from danger, shall be
provided for every enclosed space or passage-way, and such
means of access, enclosed spaces, and passage-ways shall be
adequately lighted to prevent danger.
(3) Spaces at the back of switchboards shall be kept free
of rubbish, and shall not be used for storage purposes.

POWER-HOUSES AND SUBSTATIONS.

66. (1) All power-houses and all substations shall be totally
    enclosed and inaccessible to all unauthorized persons.
    (2) Where barb wire is used for such purpose the wire shall
    be attached to supports or battens spaced not more than 5 ft.
    apart. The distance between barb wires shall not exceed 9 in.
    (3) Every fence which is used as an enclosure under this
    regulation (whether or not such fence is constructed of barb
    wire) shall have three barb wires spaced not less than 6 in.
    or more than 9 in. apart, fixed to supports on top of the fence
    and leaning outward at an angle of approximately 45°.
    (4) The gates of all enclosures shall be constructed to
    prevent access by climbing.
67. The entrance-doors of unattended power-houses or
    substations shall where practicable be provided with a spring
    or other approved device, which shall ensure that the door
    remains wide open when not properly shut and locked.
68. All those parts of power-house or substation premises
    in which electrical apparatus is placed shall be adequately
    lighted to prevent danger.
69. Adequate working-space and means of access free from
    danger shall be provided in respect of all electrical apparatus
    which has to be worked or attended to by any person.
70. Every high and extra-high pressure conductor situated
    within reach of any working-platform or in any switchboard
    passage-way shall be so placed or protected as adequately to
    prevent danger.
71. Where necessary to prevent danger, adequate pre-
    cautions shall be taken, either by earthing or by other suitable
    means, to ensure that no metal, other than the conductor,
    shall become electrically charged.
72. Adequate precautions shall be taken to prevent any
    conductor or apparatus from becoming accidentally or in-
    advertently electrically charged when persons are working
    thereon.
73. Where necessary to prevent danger, insulating-stands
    or screens shall be provided and kept permanently available,
    and shall be maintained in a sound condition.
74. (1) Ladders stored in the vicinity of pole substations
    shall be securely padlocked or otherwise made inaccessible to
    unauthorized persons.
    (2) Ladders fixed to pole substations shall either be of the
    shut-up type, and kept securely closed and padlocked when
    not in use, or of such a type that they cannot be used by
    unauthorized persons.
75. Wiring in power-house or substation buildings shall be
    carried out in accordance with the Electrical Wiring Regula-
    tions, 1927.
76. (1) Where platform type of construction is used, and
    space sufficient for any person to stand on the platform is
    provided, a substantial handrail shall be built around the
    platform.
    (2) If the handrail is of metal it shall not be connected with
    earth.
    (3) Earthed metal (e.g., pipes containing cables) shall not
    be attached to metal handrails, and when attached to handrails
    other than metal shall be so placed or protected that any
    person on the platform cannot accidentally be in contact
    with live metal and such earthed metal at the same time.
    (4) Handrails shall be fitted at a height not less than
    3 ft. or more than 3 ft. 3 in. above the platform.
    (5) Metal screens fitted to handrails shall not be connected
    with earth.
77. Fire-buckets of suitable capacity, filled with clean,
    dry sand and ready for immediate use in extinguishing fires,
    or suitable fire extinguishers filled with non-conducting fluid,
    shall be kept in a convenient situation adjacent to the electrical
    apparatus and conspicuously marked.
78. Such instructions as the Minister may from time to
    time approve as to the treatment of persons receiving electric
    shocks shall be affixed in a conspicuous place in every power-
    house and sub-station.
79. Integrating wattmeters shall, if the licensee sells
    electrical energy, be installed for recording the generating-
    station output in Board of Trade units, or, in the case of power
    purchased in bulk, to record the amount purchased. The
    units purchased or generated and the maximum half-hourly
    demand shall be recorded daily.

TRANSFORMERS.

80. (1) Where transformers are exposed to the weather
    they shall be fitted with weatherproof cases, and when fixed
    on poles they shall be either thoroughly protected against
    interference or attached to the poles at such a height as to
    make them inaccessible except by means of a ladder or other
    special appliance.
    (2) Pole-steps shall not be placed less than 9 ft. above the
    ground-level.
81. Where transformers are placed within a building or
    enclosure they shall be inaccessible except to authorized
    persons; and all high or extra-high pressure conductors in
    such buildings or enclosures shall be screened and protected
    so that persons cannot make accidental contact therewith.
82. Every transformer or bank of transformers shall be
    equipped with primary fuses or overload circuit-breakers.
83. The cases of all transformers, whether within or without
    a substation, shall be earthed by a copper conductor in
    accordance with Regulations 44 and 45 and 49 to 51 hereof.

LIGHTNING-ARRESTERS.

84. Where electrical apparatus or appliances are con-
    nected to electric lines of any voltage in such a position as
    to be liable to injury from lightning, efficient protection shall
    be provided to safeguard such apparatus or appliances.

RUBBER GLOVES, SAFETY BELTS, AND OTHER SAFEGUARDS.

85. Rubber gloves, protective covers and mats, rubber-
    soled boots and goloshers, insulated stands, safety belts,
    and hand-lines shall be provided by the licensee for use,
    when necessary, by persons employed by him.
86. Pliers and other tools insulated with a brittle material,
    or otherwise liable to have the insulation damaged in use,
    shall not be used.
87. Rubber gloves shall be used where possible when
    working on live metal, and always when removing or re-
    placing fuses or cut-outs on high or extra-high pressure
    lines.
88. Safety belts shall be used where possible when working
    on poles.
89. Hand-lines shall be used when hauling material up
    above live lines.
90. (1) Rubber gloves, protective covers, mats, boots and
    goloshers, insulated stands, and safety belts shall be inspected
    immediately before use, and any found defective shall be
    immediately repaired or destroyed.
    (2) Protective covers, rubber gloves, boots, and goloshes
    in regular use shall be tested once in every two months, and
    no such equipment shall be used unless it has been tested
    within the previous two months.
    (3) A record shall be kept of all tests made on protective
    equipment.
91. Every person working on the lines or apparatus shall
    be held responsible for using in a proper manner the safe-
    guards provided and for satisfying himself by inspection
    that they are in good order and condition.

FEEDER AND DISTRIBUTION PROTECTION.

92. (1) Each outgoing feeder or distributor from any power-
    house or substation shall be provided with fuses or an auto-
    matic circuit-breaker equipped with overload inverse time-
    limit or other approved tripping-device.
    (2) The fuse or tripping-device shall be located in each
    conductor, except an earthed neutral, and in the case of
    three-phase circuits one overload inverse time-limit trip-coil
    may be replaced by an earth-leakage trip-coil.