Electricity

Pages:67-83
CHAPTER XVII
ELECTRICITY
Section 1. General
REGULATION 59. DEFINITIONS
In this chapter the following terms have the meanings hereby
assigned to them:
(a) the term " apparatus " means electrical apparatus and
includes all machines, apparatus and fittings in which con-
ductors are used, or of which they form a part;
(b) the term " hand-held portable apparatus " means apparatus
that is held in the hands while working, with or without a
special movable support;
(c) the term " portable apparatus " means apparatus that from
the nature of its use requires to be moved while it is working,
or that is designed so that it can be moved while it is working;
(d) the term " transportable apparatus " means apparatus that
from the nature of its use requires to be moved to a new
position from time to time between the periods when it is
working;
(e) the term " conductor " means an electrical conductor arranged
to be electrically connected to a system;
(f) the term " cable " means one or more stranded conductors,
separately insulated throughout their length, and when
more than one, laid up together, and generally provided with
a mechanical protective covering;
(g) the term " flexible cable " means a cable containing one or
more cores each formed of a group of wires, the diameters
of the cores and of the wires being sufficiently small to afford
flexibility;
(h) the term " circuit " means an electric circuit forming a
system or branch of a system;
(i) the term " electric line " means a wire or wires, conductor,
or other means used for the purpose of conveying, trans-
mitting or distributing electricity with any casing, coating,
covering, tube, pipe, or insulator enclosing, surrounding, or
supporting the same, or any part
thereof;
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(j) the term " circuit-breaker" means a mechanical device
capable of making and breaking the circuit under normal
and abnormal conditions such as that of short-circuit. Unless
otherwise specified a circuit-breaker is designed to break
the current automatically;
(k) the term " fuse " means a device for protecting a circuit
from damage by overload, by means of the fusion of a
specially designed part
thereof;
(I) the term " earth1 electrode " means a metallic plate, or a
metallic pipe or pipes, or other metallic objects adequately
serving the same purpose, inserted in the ground and in
adequate electrical contact with the general mass of earth;
(m) the terms " connected with earth " and " earthed " mean
connected with the general mass of earth in such a manner
as will ensure at all times an immediate and safe discharge
of energy;
(n) the terms " insulation " and " insulating material " mean
non-conducting material enclosing, surrounding or supporting
a conductor or any part
thereof,
and of such quality and
thickness as to be suitable for the purposes of the paragraph
in which the term is used;
(o) the term " isolated " means disconnected from the source of
energy;
(p) the term " sub-station " means any premises or enclosure
or part
thereof,
being large enough to admit the entrance
of a person after the apparatus therein is in position, containing
apparatus for transforming or converting energy to or from
a voltage above medium voltage (other than transforming or
converting solely for the operation of switchgear or instru-
ments),
with or without other apparatus for switching, con-
trolling or otherwise regulating the energy, and includes the
apparatus therein;
(q) the term " switch station " means any premises or enclosure
or part
thereof,
being large enough to admit the entrance
of a person after the apparatus therein is in position, containing
apparatus for switching, controlling or otherwise regulating
energy at a voltage above medium voltage, but not for
transforming or converting energy (other than transforming
or converting solely for the operation of switchgear or instru-
ments),
and includes the apparatus therein;
(r) the term " system " means an individual electrical system in
which all the conductors and apparatus are electrically con-
nected to a common source of voltage, and includes all the
said conductors and apparatus;
1 " Earth ", " earthing ", " earthed " are equivalent to " ground ",
" grounding ", " grounded ".

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