东南西北的英文AS NZS 3000 2000(3)

2021年1月20日发(作者：和平号)
SECTION 3 SELECTION AND INSTALLATION OF WIRING SYSTEMS
布线系统的选择和安装

3.1 GENERAL
概述

The
requirements
of
this
Section
apply
to
the
selection
and
installation
of
low
voltage
wiring
systems to determine compliance with Section 1. The requirements relate to the following:
(a) Protection against external influences and environmental conditions (see Clause 3.3).
(b) Mutual detrimental influences.
(c) Selection of conductors to satisfy current-carrying capacity, voltage drop and other minimum
size requirements.
(d) Reliability and electrical continuity of connections, joints and terminations.
(e) Identification (by colour or other means)
标识（通过颜色或其他方法）
.
(f) Fire protective measures
防火措施
.
Earthing
and
equipotential
bonding
conductors
shall
comply
with
this
Section
in
addition
to
the
requirements of Section 5.
接地和等电位接驳导线应遵守本部分规定以及第
5
部分的要求。

3.2 TYPES OF WIRING SYSTEMS
接线系统类型

3.2.1 General
概述

The type of wiring system used shall either
所用接线系统应
—

(a) be in accordance with Table 3.1; or
遵照表
3.1
；或

(b) have a degree of safety equivalent to that given in Table 3.1 and comply with the requirements
of this Section.
安全等级与表
3.1
给出的相当，并遵守本部分的要求。

Method
方法

Type of cable
线
类型

fo
Resting on
In
a
surface
without
fixing
fixed
directly
to
a
surface
无
固
定
或
直
接
固
定
在
静
止
表
面

or
wiring
布线机柜
中

a
Supported
Supported
Buried
on
cable
by
tray
or
catenary
system
用
撑

supported
ladder
用
线盒支撑

direct
ground
直接埋
入地下

Buried
in
Some
typical
situation
the
a
wiring
enclosure
用线柜埋
入地下

and
use
一些绝缘使用的
installation
安装continuous
enclosure
in
the
ground
in
类型

on
cable
吊
悬
线
支
Insulated
cables(without
sheath)
绝
缘
电
缆（无护套）

N/P
P
N/P
N/P
N/P
P
·
in a wiring enclosure
·
on the surface
·
in the structure
·
buried in the ground
Sheathed
cabies
sheathed
cables
装有护套
或铠装电缆

or
aumoured
and
P
P
P
P
P
P
·
indoor
and
outdoor
locations
with
necessary
protection(non-armoured)
·
embedded
structure
·
indoor
and
outdoor
locations
with
risk
of
impact
or
rough
conditions(armoured)
·
buried
in
the
in
the
ground(where
direct
with
necessary protection)
Mineral
insulated
metal
sheathed
cables
矿物质绝
缘金属护套电缆

Served
mineral
P
insulated
metal
sheathed
cable
为矿物质绝缘金
属护套电缆

P
P
N/P
P
P
P
P
P
N/P
N/P
N/P
·
indoor
and
outdoor
locations
·
emergency
wiring
·
indoor
and
outdoor
locations
·
emergency
wiring
·
buried
in
the
system

system
ground(where
direct
with
necessary protection)
Fire
resistant
P
P
P
P
P*
P
·
in areas of fire risk
·
emergency
wiring
system
cable(sheathed)
防火电缆
（护套）

Key: P-Permitted

N/P-Not Pemitted

P*-Permitted subject to any manufacture
’
s instructions
3.2.2 Installation methods
安装方法

Examples of methods of installation of wiring systems are shown in Table 3.2.
接线系统的安装方法
实例如表
3.2
所示。


3.3 EXTERNAL INFLUENCES
外部影响

3.3.1 General
概述

Wiring systems shall be adequately protected against external influences such as those outlined in
Clauses 3.3.2 to 3.3.13, either by construction or by supplementary measures.
3.3.2 Ambient temperature
环境温度

Wiring systems shall be selected and installed so as to be suitable for the highest and lowest local
ambient temperatures.

Where materials such as PVC, which are subject to temperature limitations, are used above 60°
C
or below 0°C, manufacturer’s instructions shall be followed.

Allowance shall be made for expansion of materials due to temperature variations that may occur
in normal conditions of use.
Where
the
current-carrying
capacity
is
selected
in
accordance
with
AS/NZS
3008.1
series,
the
reference ambient temperatures shall be as follows:
(a) For cables in air, irrespective of the method of installation:
(i) 40°
C for Australia; and
(ii) 30°
C for New Zealand.
(b) For cables buried direct in the ground or installed in underground enclosures:
(i) 25°
C for Australia; and
(ii) 15°
C for New Zealand.
3.3.3 External heat sources
外部热源

To
avoid
the
effects
of
heat
from
external
sources,
including
solar
gain,
one
or
more
of
the
following methods shall be used to protect the wiring system:
(a) Shielding.
(b) Placing sufficiently far from the source of heat.
(c) Selecting a system with due regard for the additional temperature rise which may occur.
(d) Reducing the current-carrying capacity.
(e) Local reinforcement or substitution of insulating material.
(f) A method equivalent to one or more of those listed in Items (a) to (e).
Parts of a cable or flexible cord within an accessory, appliance or luminaire shall either be suitable
for the temperatures likely to be encountered or be provided with additional insulation suitable for those
temperatures.
3.3.4 Presence of water or high humidity
水环境或者高湿度场所

A wiring system shall be selected and installed so that no damage is caused by high humidity or
entry of water during installation, use and maintenance.
Where water may collect or condensation may form in a wiring system, provision shall be made for
its harmless escape through suitably located drainage points.
Where a wiring system may be subjected to wave action (water), protection against mechanical
damage shall be provided in accordance with Clauses 3.3.7, 3.3.8 and 3.3.9.

TABLE 3.1
ACCEPTABLE TYPES OF CABLE WIRING SYSTEMS

表

3.1
电缆布线系统可接受类型


TABLE 3.2 EXAMPLES OF METHODS OF INSTALLATION OF WIRING SYSTEMS
表

3.2
接线系统安装方法的实例


3.3.5 Presence of solid foreign bodies
杂物

A wiring system shall be selected and installed so as to minimize the entry of solid foreign bodies
during installation, use and maintenance.
In
a
location
where
dust
or
other
substance
in
significant
quantity
may
be
present,
additional
precautions shall be taken to prevent its accumulation in quantities which could adversely affect the heat
dissipation from the wiring system.
3.3.6 Presence of corrosive or polluting substances
腐蚀或污染性物质

Where
the
presence
of
corrosive
or
polluting
substances
is
likely
to
give
rise
to
corrosion
or
deterioration, parts of the wiring system likely to be affected shall be suitably protected or manufactured
from materials
resistant to such substances.
Dissimilar metals liable to initiate galvanic action shall not be placed in contact with each other.
Materials liable to cause mutual or individual deterioration or hazardous degradation shall not be
placed in contact with each other.
3.3.7 Impact
影响

A wiring system shall be selected and installed so as to minimize mechanical damage.
Protection
against
mechanical
damage
shall
be
provided
by
one
or
any
combination
of
the
following:
(a) Mechanical characteristics of the wiring system.
(b) Location selected.
(c) Provision of additional local or general mechanical protection.
3.3.8 Vibration
振动

A
wiring system supported
by,
or fixed
to,
a structure
or
equipment
subject
to
vibration likely
to
cause damage to the wiring system, including all cables, fixings and connections shall be suitable for the
conditions.
3.3.9 Other mechanical stresses
其他物理性压力

A
wiring
system
shall
be
selected
and
installed
so
as
to
minimize
damage
to
the
sheath
and
insulation
of
cables
and
insulated
conductors
and
their
connections
during
installation,
use
and
maintenance.
The radius of every bend in a wiring system shall
be such that conductors and cables shall not
suffer damage.
Where
a
conductor
or
a
cable
is
not
resting
on
a
continuous
surface
it
shall
be
supported
by
suitable means
at
appropriate
intervals in
such
a
manner
that
the
conductor
or
cable
does
not suffer
damage by its own weight.
Every
cable
or
conductor
used
as
fixed
wiring
shall
be
supported
in
such
a
way
that
it
is
not
exposed
to
undue
mechanical
strain
and
so
that
there
is
no
appreciable
mechanical
strain
on
the
connections
of
the
conductors,
account
being
taken
of
mechanical
strain
imposed
by
the
supported
weight of the cable or conductor itself.
A flexible wiring system shall be installed so that excessive tensile and torsional stresses to the
conductors and connections are avoided.
3.3.10 Presence of flora
植物区

Where the presence of flora is expected to constitute a hazard, either the wiring system shall be
selected accordingly or special protective measures shall be adopted.
3.3.11 Presence of fauna
动物区

Where the presence of fauna is expected to constitute a hazard, either the wiring system shall be
selected accordingly or special protective measures shall be adopted.
3.3.12 Solar radiation
日光照射

Where significant solar radiation is experienced or expected, either a wiring system suitable for the
conditions shall be selected and installed or adequate shielding shall be provided.
NOTES:
1
Sheathed
cables
exposed
to
direct
sunlight
do
not
require
further
protection
from
ultraviolet
radiation as the sheath is considered to provide the necessary protection.
2 Guidance on the effect of direct sunlight on the current-carrying capacity of cables is given in the
AS/NZS 3008.1 series.
3.3.13 Hazardous areas
危险区域

The design, construction and installation of wiring systems in hazardous areas shall comply with
the appropriate requirements of the AS 2381 series (See Clause 7.9).
3.4 CURRENT-CARRYING CAPACITY
载流量

3.4.1 General
概述

Every
conductor
shall
have
a
current-carrying
capacity
in
accordance
with
the
AS/NZS
3008.1
series, not less than the current to be carried by the conductor.
NOTE: Guidance on the determination of current-carrying capacities for copper busbars is given in
AS 4388.
3.4.2 Operating temperature limits
工作温度极限

The operating temperatures of conductors shall not exceed the limits given in Table 3.3.
导体的工作温度不能超过表
3.3
给出的极限。

Type of cable insulation(see Note 1)
Cable operating temperature,oC(see Note 7)
Normal use(see Note 2)
Cross
linked
elastomer
compounds
橡胶聚合
物

R-EP-90
R-CSP-90,R-CPE-90 and R-HF-90
R-HF-110 and R-E-110
R-S-150
R-S-200
Thermoplastic compounds(see Note 4)
塑料聚
合物

V-75
HFI-75-TP
V-90
HFI-90-TP
V-90HT
Heat-resisting fibrous
防热纤维

150
200
350
150
200
350
0
0
0
75
75
75
75
75
0
-20
0
-20
0
90
90
110
150
200
Minimum(see Note 3)
-40
-20
-*
-50
-50
Mineral
矿物质

100(sheath)
(see Note 5)5
(see Note 6)
Paper
纸质

Cross-linked polyethylene(XLPE)
聚乙烯

X-90 and X-HF-90
X-HF-110
Other
80
90
110
5
-70
-*
As
specified
in
the
As
specified
in
the
Standards
when issued
relevant
Standards
when
relevant
issued

Polymeric
cables
with
normal
use
temperatures
(see
Table
3.3)
below
75?C
are
deemed
not
suitable for Australian or New Zealand conditions.
TABLE 3.3 LIMITING TEMPERATURES FOR INSULATED CABLES
NOTES:
1 The types of cable insulation given in Table 3.3 are included in relevant specifications, i.e. AS
1026, AS/NZS 3116, AS 3147, NZS/AS 3147, AS 3158, AS 3178 NZS/AS 3178, AS/NZS 3187, AS/NZS
3191, AS/NZS 3198 and AS/NZS 3808.
2 Lower maximum temperatures will apply where materials used in the construction of the cables
or
in
association
therewith,
such
as
coverings,
sheathings,
insulating
sleevings
on
connections
and
sealing compounds, have maximum operating temperatures lower than the cable proper.
However, the allowable operating temperatures for such materials must not be exceeded.
3
If
manufacturers’
recommendations
permit,
cables
may
be
installed
in
locations
where
temperatures lower than specified may occur.
4 The current-carrying capacities for thermoplastic cables, including flexible cords used as fixed
wiring, insulated with V-90 and V-90 HT PVC compounds have been based on a conductor operating
temperature
of
75?C
because
of
the
likelihood
of
thermal
deformation
of
these
cable
types
in
the
temperature range 90 to 105?C. Cables may be operated in that temperature range when incorporated in
electrical equipment wiring and not exposed to mechanical damage, e.g. in certain types of luminaires
and heating appliances. Cables totally surrounded by thermal insulation may be considered not exposed
to mechanical damage.
5
The
current- carrying
capacities
for
MIMS
cables
are
based
on
an
operating
temperature
of
100?C for the external surface of either bare metal sheathed cables or served cables. Higher continuous
operating
temperatures are permissible for bare metal sheathed cables, dependent upon factors such as the
following:
(a) The suitability of the cable terminations and mountings.
(b) The location of the cable away from combustible materials.
(c)
The
location
of
the
cable
away
from
areas
where
there
is
a
reasonable
chance
of
persons
touching the exposed surface.
(d) Other environmental and external influences.
6 The minimum temperature of use for MIMS cables will be dependent on the cable seal used and
manufacturer's recommendations should be followed.
7 Current- carrying capacities determined in accordance with the AS/NZS 3008.1 series do not take
into account the effect of temperature rise on the terminals of electrical equipment which can result in the
temperature limits of the insulation of cables in the vicinity of the terminals exceeding the limits specified
in
Table
3.3.
In
such
cases
reference
should
be
made
to
warnings
given
in
the
electrical
equipment
Standards.
3.4.3 Conductors in parallel
并联导体

Where conductors are connected in parallel, the following requirements shall apply:
(a) The minimum cross-sectional area of the conductor shall be 4 mm2.
(b) The conductors shall be of the same material and cross-sectional area.
(c) The conductors shall be approximately the same length and shall follow substantially the same
route.
(d)
The
ends
of
conductors
shall
be
effectively
joined
by
clamping,
soldering
or
other
suitable
means.
(e)
The
current-carrying
capacity
of
conductors
shall
be
taken
as
the
summation
of
the
current-carrying capacities of the individual conductors taking into account the method of installation and
applicable derating factors.
(f)
The
cross-sectional
area
of
the
individual
conductors
shall
be
sufficient
to
withstand
the
prospective fault-current available at the point of installation.
(f)
The
cross-sectional
area
of
the
individual
conductors
shall
be
sufficient
to
withstand
the
prospective fault-current available at the point of installation.
NOTE: If an individual conductor, which forms part of a parallel group, short-circuits to earth, that
conductor will carry the majority of short-circuit current.
3.5 CONDUCTOR SIZE
导体尺寸

3.5.1 General
概述

The nominal cross-sectional area of conductors shall be not less than the values given in Table
3.4.
TABLE 3.4 NOMINAL MINIMUM CROSS-SECTIONAL AREA OF CONDUCTORS
......
NOTES:
1
Smaller
conductors
may
be
used
based
on
their
suitability
in
accordance
with
Section
1
and
taking account of voltage drop, current- carrying capacity, reliability of connections.
2 This Table does not apply to extra-low voltage or switchboard wiring.
3 The size of unprotected consumers mains should be coordinated with the electricity distributor.
3.5.2 Neutral conductor
（
NZR
）

The minimum size of the neutral conductor shall be as follows:
(a) Single-phase circuit The neutral conductor or conductors of a single-phase consumers main,
submain or final sub-circuit shall have a current-carrying capacity of not less than
—

(i) that of the associated active conductor; or
(ii)
where
there
is
more
than
one
active
conductor,
the
total
current
to
be
carried
by
such
conductors.
(b) Multiphase circuit
(i) General The neutral conductor of a multiphase consumers main, submain or final subcircuit shall
have a current-carrying capacity of not less than the maximum out-of-balance current of the circuit.
Such
out-of-balance
currents
shall
not
include
those
which
may
arise
from
the
operation
of
protective
devices
and
other
similar
abnormal
conditions
but
shall
include
any
third
and
higher
order
harmonic current. (See Item (b)(ii)).
The
current-carrying
capacity
of
the
neutral
conductor
of
consumers
mains,
where
the
MEN
system is employed, shall be not less than 33.3% of the current- carrying capacity of the associated active
conductors.
Where
multiphase
consumers
mains,
submains
or
final
subcircuits
supply
loads,
the
greater
portion of which are connected between active and neutral conductors, the current-carrying capacity of
the neutral conductor shall be not less than
—

(A)
that
of
the
largest
associated
active
conductor
where
that
conductor
has
a
current-carrying
capacity of not more than 100 A; or
(B) 100 A where the largest associated active conductor has a current-carrying capacity of more
than 100 A but not more than 200 A; or
(C) half that of the largest associated active conductor where that conductor has a current- carrying
capacity of more than 200 A.
Where
larger
active
conductors
are
installed
in
multiphase
consumers
mains,
submains
or
final
subcircuits for voltage-drop purposes, the current-carrying capacity of the neutral conductor need not be
more than half that of the larger active conductors, provided that the current-carrying capacity is not less
than that originally determined.
(ii) Harmonic currents Where a consumers main, submain or final subcircuit supplies a substantial
load
which
generates
harmonic
currents
(e.g.
fluorescent
lighting,
computers,
soft
starters,
variable
speed devices or other electronic devices), the third and any higher order harmonic current generated in
the equipment shall be added to the maximum out-of- balance load to determine the current to be carried
by the neutral conductor. For this purpose the third and any higher order harmonic current in the neutral
conductor shall be taken as 100% of the highest load generating harmonic currents on any phase.
NOTE: A harmonic current load which constitutes not less than 40% of the total load on any single
phase is regarded as substantial.
(iii)
Neutral
overload
detection
A
neutral
conductor
of
a
multiphase
circuit
may
have
a
current- carrying capacity lower than that determined by Items (i) and (ii) provided that a detection device
is
fitted
and
arranged
so
that
the
current
cannot
exceed
the
current-carrying
capacity
of
the
neutral
conductor.
(c)
Separate
MEN
installation
The
minimum
size
of
the
neutral
conductor
of
a
submain
to
an
outbuilding
or
detached
portion
of
an
electrical
installation
which
is
used
as
a
neutral-earth
bonding
conductor shall
—

(i) comply with the requirements of Items (a) and (b); and
(ii) be not less than that of an earthing conductor as required by Clause 5.5.
3.5.3 Earthing conductor size
接地导体尺寸

The size of an earthing conductor shall be determined in accordance with Section 5.
接地尺寸根据第
5
部分说明制定。

3.6 VOLTAGE DROP
电压降落

3.6.1 General
概述


Under
normal
service
conditions
the
voltage
at
the
terminals
of
any
powerusing
electrical
equipment shall be not less than the lower limit specified in the relevant electrical equipment Standard.
Where the electrical equipment concerned is not covered by a standard the voltage at the terminals
shall be such as not to impair the safe functioning of the electrical equipment.
3.6.2 Value
值

The cross-sectional area of every current- carrying conductor shall be such that the
voltage drop
between the point of supply and any point in the electrical installation does not exceed 5% of the nominal
voltage
at
the
point
of
supply
when
the
conductors
are
carrying
maximum
demand
determined
in
accordance with Clause 1.8.3.
The value of current used for the calculation of voltage drop need not exceed the
—

(a) total of the connected load supplied through the circuit; or
(b) maximum demand of the circuit; or
(c) current rating of the circuit protective device.
For final subcircuits, with distributed load (such as socket-outlets or lighting), half the current rating
of the protective device may be used.
The requirements of this Clause apply to steady current conditions. They are not applicable to the
following:
(i) Motor starting, solenoid closing and other similar applications where high transient currents may
be experienced which can significantly increase voltage drop.
(ii) Extra-low voltage currents. (see Clause 7.7.7).
NOTE: Detailed information on voltage drop, including calculation of voltage drop and a method for
choosing conductor sizes taking into account voltage drop, is given in the AS/NZS 3008.1 series.
3.6.3 Conductors in parallel
并联导体

The voltage drop for a circuit in which conductors are connected in parallel shall be taken as
the
voltage drop in one of the conductors when that conductor is carrying a current determined by dividing
the
value
of
current
of
the
circuit
determined
in
accordance
with
Clause
3.6.2
by
the
number
of
conductors in parallel.
3.7 ELECTRICAL CONNECTIONS
电气连接

3.7.1 General
概述

Connections
between
conductors
and
between
conductors
and
other
electrical
equipment
shall
provide electrical continuity and adequate mechanical strength.
3.7.2 Connection methods
连接方式

3.7.2.1 General
概述

The selection of the method of connection shall take account, as appropriate, of the following:
(a) Material of the conductor and its insulation.
(b) Number and shape of the wires forming the conductor.
(c) Cross- sectional area of the conductor.
(d) Number of conductors to be connected together.
(e)
Temperature
attained
by
terminals
in
normal
service
such
that
the
effectiveness
of
the
insulation of the conductors is not impaired.
(f)
Prevention
of
entry
of
moisture
and
the
siphoning
of
water
through
any
cable
or
wiring
enclosure.
3.7.2.2 Preparation for connection
连接准备

The
insulation
on
a
conductor
shall
not
be
removed
any
further
than
is
necessary
to
make
the
connection. For connections between insulated conductors the connection shall be insulated to provide a
degree of insulation not inferior to that of the conductors. Any damaged insulation shall be reinstated.
3.7.2.3 Loosening of connections
连接松散

Connections shall be made so that no loosening is likely due to vibration, alteration of materials or
temperature variations to which the connections are likely to be subjected in normal service.
3.7.2.4 Retention of stranded conductors

The ends of stranded conductors shall be secured by suitable means so as to prevent spreading or
escape of individual strands. They shall not be soft soldered before clamping under a screw or between
metal surfaces.
3.7.2.5 Mechanical stress
机械压力

All cables and conductors shall be installed so that there is no undue mechanical stress on any
connection.

3.7.2.6 Soldered connections
焊接接头

Where a soldered connection is used the design shall take account of creep, mechanical stress
and temperature rise under fault conditions.
3.7.2.7 Flexible cords
软线

Flexible cords, except where used as fixed wiring, shall not be joined except by means of suitable
cable couplers.
Connections between a flexible cord and fixed wiring shall be made in a suitable device containing
suitable
screwed
or crimped
terminals.
Any
flexible
cord shall be
installed
so
that
undue stress on
its
connections due to a pull on the cord is alleviated by a pillar, post, grip, tortuous path, or other effective
means. Knotting of the flexible cord shall not be acceptable for this purpose.
3.7.2.8 Aerial conductors
架空线

Connections or joints in aerial conductors in tension shall be made without soldering.
3.7.2.9 Underground cables
地下电缆

Connections in underground wiring shall be sealed to prevent the entry of moisture.
3.7.2.10 Earthing conductors
接地导线

In general for tunnel type connections, at least two screws shall be provided to maintain effective
clamping of the conductors.
This requirement need not apply where
—

(a) one clamping screw, in direct contact with the conductor, is provided at the fixed terminals of
electrical equipment such as junction boxes, socket-outlets, and lampholders; or
(b) one screw is provided in bars or links and the outside diameter of the screw is not less than
80% of the tunnel diameter; or
(c) one screw is provided in connections arranged
so that the conductor is clamped by suitable
ferrules or plates in direct contact with the conductor.
Where
soldering
is
used
for
the
jointing
or
connection
of
earthing
conductors,
the
earthing
conductors shall be retained in position by acceptable means independently of the solder.
3.7.3 Enclosures
壳体

An enclosure may be required to provide adequate mechanical protection and protection against
relevant external influences.
3.8 IDENTIFICATION
标识

3.8.1 General
概述

In general, insulated conductors shall be identified by the colours given in Table 3.5 to indicate their
intended function (such as active, neutral and earth/equipotential bonding conductor).
通常，绝缘导体根据表
3.5
给出的颜色进行区分，显示它 们预定的功能（如带电的，中性的和接地
/
等电位接驳导体）

Where a combination such as green/yellow is used, one colour shall cover not less than 30% and
not more than 70% of the surface, with the other colour covering the remainder of the surface.
TABLE 3.5 COLOURS OF CABLE CORES
缆芯颜色

Function
Identifying colours
Recommended
Earth/bonding
Neutral
Active
Green/yellow
Black
Red
Alternative
Green(see Note)
Light Blue
Any
colour
except
green/yellow,green,yellow,black,light blue

NOTES:
1
Where
a
required
earthing
conductor
is
not
normally
manufactured,
a
suitable
insulated
conductor may be used but shall be identified along its entire length by a green coloured sleeving.
2 In New Zealand, the use of the colour yellow to identify active conductors may continue but will
not be permitted in the next edition of this Standard.
3.8.2 Core identification
线芯标识

Coloured
identification
at
each
termination
may
be
used
for
live
conductors,
using
one
of
the
following types of material:
(a) Heat shrink sleeving.
(b) Fixed sleeving.
(c) Elastic sleeving requiring a special applicator.
Core
identification
shall
be
colourfast,
permanent,
non-conducting,
compatible
with
the
cable
insulation, and suitable for the location.
Green/yellow,
green
or
yellow
colour
insulated
conductors
shall
not
be
sleeved
to
indicate
live
conductors.
3.8.3 Earthing conductor
接地导体

If a conductor is sleeved or sheathed to identify it as an earthing conductor, the conductor shall be
identified along its entire length.
3.8.4 Aerial conductors
架空线

3.8.4.1 Neutral conductor
中线

The cable core of an aerial cable which is identified by means of a number of small longitudinal ribs
evenly
spaced
around
the
circumference
of
the
core
throughout
its
entire
length
shall
be
the
neutral
conductor.
3.8.4.2 Earthing conductor
接地导线

Aerial earthing conductors shall be identified at each end of the ru
n either by the letter ‘E’ or by the
earthing symbol .
3.9 INSTALLATION REQUIREMENTS
安装要求

3.9.1 General
概述

Wiring systems shall be installed in accordance with the generally accepted principles of safe and
sound practice using methods that will protect the electrical installation against mechanical or electrical
failure
under
ordinary
use,
wear
and
tear,
and
any
abnormal
conditions
which
may
reasonably
be
anticipated.
3.9.2 Methods of installation
安装方法

Examples of methods of installation of wiring systems in relation to particular types of conductors
or
cables
are
depicted
in
Table
3.2,
and
any
methods
used
shall
make
allowances
for
the
effect
of
external
influences
(See
Clause
3.3)
on
the
wiring
system
except
where
these
are
covered
by
the
requirements of the relevant product Standards.
Examples of acceptable types of wiring systems are shown in Table 3.1.
可接受的接线系统类型实例见表
3.1.
NOTE:
Other
types
of
wiring
systems,
not
covered
in
this
Section,
may
be
used
provided
they
comply with the general requirements of this Section.
3.9.3 Support and fixing
支撑和固定

Where
a
wiring
system
is
not
resting
on
a
continuous
surface
it
shall
be
supported
by
suitable
means in accordance with Clause 3.3.9.
Where necessary a wiring system shall be fixed in position by suitable clips, saddles or clamps or
by means which will not damage the wiring system and which will not be affected by
the wiring system
material or any external influences.
Any specific methods of fixing outlined in this Standard shall not preclude the use of alternative
methods provided an equivalent degree of support and strength is maintained.
3.9.4 Protection against mechanical damage
机械伤害保护

3.9.4.1 General
概述

Wiring
systems
installed
in
positions
where
they
are
likely
to
be
subject
to
mechanical
damage
shall
be
adequately
protected
in
accordance
with
Clause
3.3.7
and
the
applicable
requirements
of
Clauses 3.9.4.2 to 3.9.4.6.
3.9.4.2 Wiring systems located in or under floors
地面或地下的接线系统

Wiring systems in or under a floor shall be sufficiently protected to prevent damage caused by the
intended use of the floor.
Wiring systems shall be protected by one of the methods outlined in Clause 3.9.4.6 if they are
—

(a) within a concrete or similar floor at a depth of less than 50 mm from any surface; or
(b) fixed in position below a timber or similarly fixed floor less than 50 mm from the underside of the
floor.
3.9.4.3 Wiring systems located above ceilings
天棚上的接线系统

Wiring
systems
which
are
installed
above
a
ceiling
shall
be
protected
by
one
of
the
methods
outlined in Clause 3.9.4.6 if they
—

(a) pass through or are fixed in position within 50 mm of a ceiling fixing support; and
(b) are less than 50 mm from the surface of the ceiling material in contact with the fixing support.
3.9.4.4 Wiring systems located below roofs
屋顶下的接线系统

Wiring systems installed below a roof shall not be installed through any space formed between the
roof material and its immediate support.
Wiring systems shall be protected by one of the methods outlined in Clause 3.9.4.6 if they pass
through the immediate roof support, or are fixed in position, within 50 mm from the underside of the roof
material.
3.9.4.5 Wiring systems concealed in walls
墙里的接线系统

Wiring
systems
installed
in
a
wall
and
located
within
50
mm
of
the
surface
of
the
wall
shall
be
protected by one of the methods outlined in Clause 3.9.4.6 where they are
—

(a) concealed in a solid wall; or
(b) fixed or otherwise restrained in position in a hollow wall.
These requirements need not apply to wiring systems which are
—

(i) installed within the zones shown in Figure 3.1: or.
(ii)
installed
to
be
able
to
move
freely
within
holes
in
supports
in
hollow
walls,
such
as
studs,
noggins and wall plates.
FIGURE 3.1 EXAMPLE OF PROTECTION REQUIREMENTS FOR WIRING SYSTEMS
接线保护
要求的实例

3.9.4.6 Protection methods
保护方式

Where protection of the wiring systems outlined in Clauses 3.9.4.2 to 3.9.4.5 is required they shall
be
—

(a) provided with adequate mechanical protection to prevent damage; or
(b) provided with an earthed metallic armouring, screen, covering or enclosure; or
(c) protected by an RCD with a maximum rated residual current of 30 mA.
3.9.5 Wiring systems likely to be disturbed
接线系统可能被干扰

3.9.5.1 General
概述

Wiring
systems
installed
in
locations
where
they
are
likely
to
be
disturbed
shall
be
installed
in
accordance with the requirements of Clauses 3.9.2 and 3.9.3.
3.9.5.2 Locations
位置

Wiring systems installed in the following locations are deemed likely to be disturbed:
(a) On the surface of a wall or on the underside of a ceiling.
(b) In a space between a floor and the ground to which a person may gain entry.
(c) In a ceiling space having an access space exceeding 0.6 m high.
(d) Within 2.0 m of any access to any space to which a person may gain entry.
3.9.5.3 Fixing arrangements
固定配置

Cables likely to be disturbed shall be fixed to prevent undue sagging.
3.9.6 Wiring systems installed vertically
垂直安装的接线系统

Where wiring systems are installed vertically they shall be installed generally in accordance with
the requirements of Clauses 3.9.2 and 3.9.3 and in such a manner as to avoid damage to any part of the
wiring system which may be caused by its own weight or method of support or fixing.
3.9.7 Change of direction
改变方向

Where wiring systems are required to change direction, the following requirements shall apply:
(a)
Cables
forming
part
of
the
wiring
system
shall
be
bent
in
a
manner
that
will
neither
cause
damage nor place undue stress on their sheathing or insulation.
(b) The radius of any bend in a wiring system shall not require cables forming part of the system to
be bent to a radius less than that recommended by the manufacturer.
Where
manufacturers
information
is
not
available,
the
following
minimum
internal
radii
may
be
considered suitable:
(i) Unarmoured sheathed cables ......... 6 times the cable diameter.
(ii) Armoured sheathed cables .......... 12 times the cable diameter.
Where a change of direction is likely to cause excessive pressure on any cable forming part of a
wiring
system,
the
cable
shall
be
brought
over
a
support
from
which
any
sharp
edges
have
been
removed.
3.9.8 Summary of requirements
要求汇总

NOTE: A summary of additional installation requirements for different wiring systems is set out in
Clauses 3.9.8.1 to 3.9.8.6.
3.9.8.1 Insulated cables (without sheath)
绝缘电缆（无护套）

3.9.8.1.1 General
概述

In general, insulated cables (without sheath) shall be installed in a suitable wiring enclosure which
affords protection of the cables in accordance with Clause 3.10.
3.9.8.1.2 Prohibited as consumers mains

Insulated
cables
(without
sheath)
enclosed
in
metallic
wiring
enclosures
shall
not
be
used
as
consumers mains.
This shall not preclude the use of insulated cables (without sheath) in the following arrangements
for consumers mains:
(a) Paper insulated lead covered cables without a sheath.
(b) Cables inside metallic switchboard surrounds.
(c)
Cables enclosed in metallic
wiring
enclosures
where
the
cables
are
protected
on
the
supply
side by short-circuit protective devices.
NOTE:
The
electricity
distributor’s
service
protective
device(s)
is
deemed
as
providing
the
protection referenced in this Clause.
3.9.8.2 Sheathed cables (armoured and unarmoured)
装有护套的铠装电缆（铠装和非铠装）

Sheathed cables installed in concrete, plaster or cement render shall comply with the following:
(a) Armoured sheathed cables Armoured sheathed cables may be installed in concrete, plaster or
cement render without protection of a wiring enclosure or restriction on the length or direction of the cable
run.
(b) Unarmoured sheathed cables The following applies to unarmoured sheathed cables:
(i) In concrete Unarmoured sheathed cables may be installed in concrete provided that the cables
are
contained
in
an
appropriate
wiring
enclosure
and
installed
in
accordance
with
Clauses
3.3.7
and
3.9.4.
(ii) In plaster or cement render Unarmoured sheathed cables may be installed in plaster or cement
render without protection of a wiring enclosure provided that the cables are installed in accordance with
Clauses 3.3.7 and 3.9.4.
3.9.8.3 Mineral insulated metal sheathed (MIMS) cable
矿物质绝缘金属铠装电缆

3.9.8.3.1 Protection against corrosion
腐蚀保护

Cables shall be protected by a suitable serving where they are
—

(a) buried in concrete or plaster containing corrosion agents; or
(b) installed underground in accordance with Clause 3.11; or
(c) in other locations where corrosion is likely to occur.
3.9.8.3.2 Protection against vibration
振动保护

Movement caused by vibration shall be provided for by introducing a loop in the cable immediately
before the termination. The size of the loop shall be determined by the cable size and severity of the
vibration.
3.9.8.3.3 Support and fixing
支撑和固定

The
cable
shall
be
supported
and,
if
necessary,
fixed
in
position
so
as
to
provide
adequate
protection against damage. The supports and fixings shall be suitable for use at the highest temperature
attained by the cable according to the circumstances of its use.
NOTE:
See
Clause
4.3.2.3
for
requirements
concerning
the
effect
of
elevated
temperatures
on
adjacent materials.
3.9.8.4 Flexible cords used as fixed wiring
用于固定接线的软线

Flexible cords used as fixed wiring shall be of the heavy duty type unless installed in a suitable
wiring enclosure.
Flexible
cords
installed
as
follows
shall
be
regarded
as
fixed
wiring
and
shall
comply
with
the
requirements for fixed wiring set out in this Section 3:
(a) Permanently connected flexible cords other than flexible cords used as pendants for lamps or
luminaires, pendant socket-outlets or for connecting appliances.
(b) Flexible cords not open to view other than
—

(i) flexible cords with a length not exceeding 2.5 m; and
(ii)
used
for
the
connection
of
a
single
appliance
or
luminaire
provided
that
the
cord
has
a
current-carrying capacity of not less than
—

(A) the current rating or setting of the circuit protective device when used for the connection of a
single appliance; or
(B) the actual load of the appliance or luminaire. However, the minimum cross-sectional area of
any conductor shall be not less than 0.75 mm2.
NOTE:See Clause 3.10.1 for requirements for enclosure of cables.
3.9.8.5 Low voltage track systems
低压轨道系统

3.9.8.5.1 Open to view

The complete track system shall be installed so that it is open to view throughout its entire length
but not necessarily from one position.