JULY 12.] THE NEW ZEALAND GAZETTE. 2397

Electrical Wiring Regulations, 1927.

CHARLES FERGUSSON, Governor-General.
ORDER IN COUNCIL.
At the Government House at Wellington, this 11th day of
July, 1927.
Present:
HIS EXCELLENCY THE GOVERNOR-GENERAL IN COUNCIL.
IN pursuance and exercise of the powers and authorities
conferred on him by the Public Works Act, 1908,
as amended by section two of the Public Works Amendment Act, 1911, and of every other power and authority
enabling him in that behalf, His Excellency the Governor-General of the Dominion of New Zealand, acting by and
with the advice and consent of the Executive Council of
that Dominion, doth hereby make the following Regulations for the purposes of the said section two and doth
hereby declare that this Order in Council shall come into
operation on the date of the publication thereof in the
New Zealand Gazette.

PRELIMINARY.

1. THESE regulations may be cited as the Electrical Wiring
   Regulations, 1927.
2. These regulations are divided into Divisions and Parts
   as follows:—
   Division I.—General
   Part I. Application of and Exemptions from
   Regulations.
   Part II. Permits for Wiring-work.
   Division II.—Rules to be observed in the Permanent
   Wiring of Premises and the Installation of Fittings,
   Accessories, Appliances, and other Electrical Apparatus.
   Part III. Electrical Plant—Generating, Storage,
   and Transforming.
   Part IV. Switch-gear.
   Part V. Distribution.
   Part VI. Fittings and Accessories.
   Part VII. Motors, Control-gear, and Lifts.
   Part VIII. Heating, Cooking, and other Appliances.
   Part IX. Places of Public Amusement.
   Part X. High and Extra-high Pressures.
   Part XI. Earthing.
   Part XII. Additions and Alterations to Installations.
   Division III.—Inspection and Testing.
   Part XIII. Inspection and Testing.
3. (1) Throughout these regulations, unless the context
   otherwise requires, the following terms shall have the meanings given to them in this clause:—
   “Accessory” is any appliance, other than a fitting,
   associated with the wiring, fittings, and consuming-devices; for example, a small switch, cut-out,
   plug, socket, or similar device.
   “Appliance” is a consuming-device in which the electrical
   energy is converted into heat or drives a small electric
   motor forming an integral part of the device.
   “Authorized Inspector” means any Inspector registered
   under the Electrical Wiremen’s Registration Act,
   1925, and employed as such by the electrical supply
   authority concerned, save that in any case where
   the electrical supply authority is also the consumer
   “authorized Inspector” shall mean a person ap-pointed for the purpose by the Chief Electrical Engineer.
   “Balanced”: A three-wire system of generation or
   supply is said to be “balanced” when—
   (a) In the case of direct-current or single-phase
   alternating-current systems of generation or supply
   the loads connected between the middle and each
   of the outer conductors are equal.
   (b) In the case of a three-phase system of generation or supply the load carried by any combination
   of two conductors is equal to the load carried by
   any other combination of two conductors.
   (c) In the case of a three-phase four-wire system
   of generation or supply, in addition to condition (b)
   above, the loads connected between the neutral
   and each of the “phase” conductors are also equal.
   “Cable” means one or more conductors with or without
   insulating covering and with or without protective
   coverings, and also includes a wire.

“Cable, armoured”: An armoured cable is one provided with a metallic covering of wires or tapes as
a protection against mechanical injury.
“Cables, bunched”: Cables are said to be bunched
when more than one is contained within a single
duct or groove, or when unenclosed cables are not
separated from each other.
“Cable, flexible”: A flexible cable is one in which the
conductor (or conductors) exceeds 0·007 square inch
in cross-section, and comprises a number of wires,
the diameter of the wires and the material of the
dielectric being such as to ensure flexibility.
“Chief Electrical Engineer” means the person for the
time being holding that office in the Public Works
Department.
“Circuit-breaker” is a device suitable for opening automatically a circuit under predetermined conditions,
such as those of overload.
“Cord, flexible,” is a flexible cable of cross-section not
exceeding 0·007 square inch.
‘Core’ (of a cable) is the conductor with its insulation
or dielectric, but does not include the mechanical
protective covering. Two, three, or more cores may
be laid up together to form a twin, three-core, or
multi-core cable.
“Cut-out” comprises all the separate parts—e.g., fuse,
fuse-carrier, fuse-contacts, fuse-extension, and circuit
contacts—which, together with their mountings and
base, form the complete protecting-device.
“Dielectric” means that portion of a core or cable which
is relied upon to insulate the conductor.
“Distribution or section fuse-board” is an accessory
containing fuses with or without a switch or switches
arranged for the distribution to, and protection and
control of, branch circuits fed from a main circuit.
“Double insulation”: A conductor is said to have
double-insulation when it is provided with insulatingmaterial between the conductor and its surrounding
envelope or immediate support, as well as between
such envelope or support and earth.
“Earthed” means connected to the general mass of
earth in such a manner as will ensure at all times an
immediate discharge of electrical energy without
electrical hazard.
“Earthing-lead” is the conductor connecting the
eyarthing-system to the metal sheathing or apparatus
required to be earthed.
“Electrical hazard” means danger to life or property
from electrical energy.
“Electrical supply authority” or “supply authority”
means a licensee as defined by the Electrical Supply
Regulations, 1927.
“Electrical Supply Regulations, 1927,” means the regulations so intituled made under the Public Works
Act, 1908, as amended by section two of the Public
Works Amendment Act, 1911, by Order in Council
dated the 11th day of July, 1927, and published in
the Gazette of 12th day of July, 1927.
“Fitting” is any device for supporting or containing
a lamp, together with its holder and shade or
reflector; for example, a bracket, pendant and
ceiling-rose, electroliter, or portable standard.
“Fuse”: A fuse is the actual wire or strip of metal
in a cut-out which is intended to be fused by an
excessive current.
“Fuse-switch” is a switch the moving part of which
carries one or more fuses.
“Live” (alive): An object is said to be alive when a
difference of potential exists between it and earth,
and, except in the case of a multiple earthed neutral
system, all metal connected to the neutral conductor
of the supply system, even if such neutral is earthed
at the source of supply, shall be deemed to be alive
for the purpose of these regulations.
“Machine (electrical)” is a rotating-device for converting
electrical energy into mechanical energy, or vice
versa, or for converting one form of electrical energy
into another.
“Machine, drip-proof,” is one which has a frame provided with openings for ventilation, so protected as
to exclude falling water or dirt.
“Machine, enclosed, ventilated,” is one in which the
ventilating-openings in the frame are protected with
wire screen, expanded metal, or other suitable perforated covers having apertures not exceeding ¼ square inch in area, but not less than ¹⁄₅₀ square
inch in area.