2782
THE NEW ZEALAND GAZETTE.
[No. 93

affected in the event of a fault or leakage
of current.

(f.) All insulating-material shall be chosen with
special regard to the circumstances of
its proposed use. It shall be of adequate
strength for its purpose, and, so far as
is practicable, it shall be of such a cha-
racter or so protected as fully to maintain
its insulating properties when used in
inflammable gas, high temperature, and
excessive moisture.

(g.) Adequate means shall be provided for im-
mediately indicating any defect in the
insulation of a system.

(h.) The insulating-material of each cable-end
shall be efficiently sealed as to prevent
diminution of its insulating properties,
and when necessary to secure gastightness
there shall be properly constructed bushes.

(i.) Generators, rotary converters, accumulators,
or other equipment for supplying the cur-
rent shall not be erected within a distance
of at least 150 ft. from any well, tank, or
gasometer.

(j.) Transformers may be erected within the
limits of the preceding paragraph, but not
inside the derrick or adjacent buildings.

(k.) The voltage of supply for lighting purpose
shall not exceed 110 volts.

(l.) When oil-gas commences to rise from any
well, or from the time of shutting off the
water with hermetic casing, only electric
filament lamps shall be used in lighting
the derricks and the adjacent buildings.
Every electric lamp shall be enclosed in
an airtight fitting with a substantial
protecting iron basket, and the lamp-
globe itself shall be hermetically sealed.
Switches shall on no account be placed
near to a lamp in the prohibited area.

(m.) No oil-lamp shall be permitted for the light-
ing of derricks, or buildings adjacent
thereto, unless authorized in writing by
the Inspector. Such lamps shall be in
special weather-proof boxes, placed out-
side the derrick or building, and pro-
tected by a strong and tight-fitting glass.
The burner of the lamp shall be so ar-
ranged that the light may be extinguished
without opening the box.

(n.) The use of any electric hand safety-lamp
shall not be permitted until the type of
lamp has been approved by the In-
spector.

(o.) The use of electric filament lamps connected
to sockets with flexible conductors is
prohibited. Arc lamps shall not be used
within a distance of at least 150 ft. from
any well, tank, or gasometer, and the
point of light when using such lamps
shall be at least 40 ft. high.

(p.) Within a radius of 150 ft. from any well,
tank, or gasometer the conductors shall
be covered with approved insulation,

such as double cotton insulation or double
cotton braiding impregnated with red
lead, or with simple cotton braiding and
asbestos covering. The use of rubber
insulation is not permitted within the
area hereinbefore specified.

(q.) If the switches and fuses are within 150 ft.
of a well switches of gastight construction
shall be used, and fuses shall be enclosed
in gastight boxes. The use of ordinary
lead wire for fuses is prohibited.

(r.) Every fuse shall be enclosed in a properly
constructed box, and shall be of such
construction, or so protected by a
switch, that it may be renewed without
danger.

(s.) Joints in conductors shall be carefully
made, soldered, and completely insulated
and protected by waterproof tape. The
jointing of wires by simple bending is not
sufficient, and is prohibited.

(t.) At the derricks and adjacent buildings all
conductors shall be run in metal conduits,
which shall be electrically continuous and
effectively earthed.

(u.) All motors shall be constructed so that
when any part is live all rubbing-contacts
(commutators and slip-rings) are so ar-
ranged or enclosed as to prevent open
sparking.

(v.) The pressure shall be switched off the ap-
paratus immediately any open sparking
occurs, and during the whole time an
examination or adjustment disclosing
parts liable to open sparking is being
made. The pressure shall not be
switched on again until the apparatus
has been examined and the defect (if
any) has been remedied or the adjust-
ment made.

(w.) Every portion of the electrical installation,
including all structural parts and electric
appliances and devices belonging to or
connected therewith, shall be duly and
efficiently maintained. The plant shall
be examined at least every six months,
and at such examination it shall be
specially ascertained if the whole in-
stallation complies with the regulations
for safety from fire. The examination
shall be made by the Inspector, and the
faults which are discovered shall be
immediately rectified.

(x.) During stoppages of work all pressure shall
be switched off, and in the event of a
dangerous blowout from any well the
lights at the derrick shall be immediately
switched off.

(y.) All broken or damaged protecting glasses
shall be immediately replaced by new
ones, and the replacement of lamps shall
only be done after the pressure has been
switched off. Whenever possible, repairs
shall be effected in daylight.