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					Wiring Rules Information
Seminar




               AS/NZS 3000:2007



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                   WHAT’S NEW

   A survey found industry wanted a document that:
    Is more suited to the present regulatory structure;
    Is more logical and easier to understand;
    Reinstates much of the guidance information that was
     removed from the 2000 edition;
    Has more examples.




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             WHAT’S NEW
  Standard is in 2 parts bound as 1 document:

  Part 1
   provides uniform essential elements that constitute
    minimum regulatory requirements;
  Part 2
   provides installation practices that achieve certainty of
    compliance with Part 1.



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             WHAT’S NEW

  Preface contains details of 56 additions and alterations
  included in the new Standard.
  These include:
  extended application of safety switches;
  protection against arcing faults;
  requirements for discrimination between circuits;
  installation couplers recognised as a suitable means of
    connection;
  (continued)


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              WHAT’S NEW

 strengthening requirements for the prevention of the spread
  of fire;
 enhanced requirements for recessed luminaires;
 requirements for sanitisation areas in the food processing
  industry;
 mandatory testing of safety switches for correct operation;
 additional appendices, improved index, more logical
  layout, further illustrations and background information.



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                       PART 1
                     DEFINITIONS
Revised definition:
  Clause 1.4.82 Safety service
  A system or component that operates to identify an
  emergency, or is intended to operate during an emergency,
  and is primarily associated with –
  (a) the safety of persons evacuating a building; or
  (b) fire-fighting operations; or
  (c) fire suppression.
  Called ―emergency systems or essential equipment‖ in
  previous editions.


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                       PART 1
                     DEFINITIONS

New definition:
  Clause 1.4.69 Outbuilding
  A structure completely separated by an area of land from
  another structure containing the switchboard from which
  supply is obtained.

See Clause 5.5.3.3 Earthing of outbuildings.




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                PART 1
SCOPE, APPLICATION AND FUNDAMENTAL
              PRINCIPLES

Part 1 (Section 1) provides a mechanism for acceptance of
design practices that may not be addressed in Part 2.

This mechanism is only intended to apply where
departures from the methods in Part 2 are significant.

However, a degree of flexibility exists within Part 2.




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                          PART 1



Clause 1.9.4 Compliance by specific design and installation.

  Certain installations or portions of installations that may
  have unusual requirements, applications or intended use,
  that cannot meet Part 2 may use a specific design and
  installation method.




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                         PART 1

Such installations may be deemed suitable provided that
they:
satisfy the fundamental safety principles of Part 1;
result in a degree of safety not less than that which would
  be achieved by compliance with the particular
  requirements of this Standard; and
satisfy the other requirements of this Standard as detailed
  in this Clause.
The remaining portions of such installations shall comply
with Part 2.



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                          PART 1

If all or part of the design/construction is not based on Part
2, this choice must be made by the designer prior to final
certification of construction by the person carrying out the
construction.

Any departures from Part 2 must be formally
acknowledged by the installation owner or operator.

The designer shall document the Part 1 design.




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                           PART 1


Documentation must:
 be in English;
 state why Part 2 was not used;
 list the verification requirements that are required to ensure
  compliance;
 state how compliance with Part 1 is achieved;
 contain the owner/operator’s acknowledgement as to the
  departures from Part 2;



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                          PART 1



 List any requirements where the design requires specific
  use;
 List the verification undertaken to ensure compliance and
  include the results of this verification.
 Be retained by the designer and also on site by the person
  with overall responsibility for the installation.




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                        PART 2
                       GENERAL


Part 2 provides installation practices that achieve
compliance with Part 1.
It generally retains the structure of AS/NZS 3000:2000.
It restores information from AS 3000:1991.
Emphasis placed on common, practicable and cost-
effective methods.




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          PART 2 – SECTION 2
 GENERAL ARRANGEMENT, CONTROL AND
            PROTECTION
Clause: 2.2.1.2 Common neutral
    A common neutral conductor may be used for two or
    more circuits subject to the following conditions:
(a) The continuity of the common neutral shall not depend
    on connections at the terminals of electrical equipment,
    including control switches.
(b) The circuits shall be controlled and protected by linked
    circuit breakers.
(c) The neutral shall be marked at the switchboard to
    identify the associated active conductors. (Cl. 2.9.9.5)


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                       SECTION 2


Clause: 2.3.3.2 Number of main switches
  The number of main switches should be kept to the
  minimum practicable to provide effective operation in an
  emergency.
Domestic installations:
 One switch per separately metered supply;
 Where there is more than one separately controlled supply
  from a meter, a main switch is required for each supply.




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                        SECTION 2


  Clause: 2.5.1.1 requires overcurrent protection of the
  consumers mains in accordance with one of the following:
 short circuit and overload protection at the origin (point of
  supply);
 short circuit at the origin and overload protection at the
  main switchboard;
 short circuit protection not required where overload
  protection is provided at main swb. and mains are
  constructed and installed to Clause 3.9.7.1.2. (unprotected
  U/G tee-off arrangement)


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                      SECTION 2


Clause: 2.5.1.1 (continued)
Note:
    Distributor’s Service fuse will provide short circuit
    protection. (Requirement of the Qld Electrical Safety
    Act & Regulation 2002)
    Distributor’s circuit breaker may provide both short
    circuit and overload protection.




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                      SECTION 2

Clause: 2.5.1.1 (continued)
Note:
    Consumers mains supplying circuits that are
    individually protected against overload are deemed to
    have overload protection where the sum of the circuit
    breaker ratings does not exceed the current carrying
    capacity of the consumers mains.
Eg. Simple domestic installation with gas range and water
    heater comprising of 2 — 20A power circuits and 2
    — 10A lighting circuits and 63A consumers mains
    will comply with the above.


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                       SECTION 2

Clause: 2.5.5.1 Protection against switchboard internal
                arcing fault currents

  Protection against arcing faults while equipment is in
  service, or is undergoing maintenance, shall be provided
  for heavy current switchboards. (ie. switchboards >800A
  per phase).

  The supply conductors up to the line side of the protective
  devices shall be provided with means to reduce initiation
  of arcing faults by insulation or by separation.


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                      SECTION 2

Clause: 2.5.5.2
Heavy current switchboards shall be provided with internal
separation in accordance with AS/NZS 3439.1.

Note:
Arc fault containment is not required and is considered to
be an enhancement of internal separation.
See Clause 7.2.8 for switchboards supplying ―Safety
Services‖.


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                      SECTION 2

Clause: 2.5.5.3
Protective devices shall be provided to limit, as far as
practicable, the harmful effects of a switchboard internal
arcing fault by automatic disconnection.

Note:
Switchboards complying with AS/NZS 3439.1
Forms 3b — 4bh should meet these requirements.



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                        SECTION 2

Clause: 2.5.7.1 Reliability of supply

The electrical installation shall be designed to provide a
reliable supply by dividing the electrical installation into
appropriate circuits and selecting protective devices with
appropriate discrimination so that in the event of a fault
occurring, the loss of supply resulting from operation of a
protective device is minimized.

The selection and setting of the protective devices shall be
verified by inspection.


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                       SECTION 2
Clause: 2.5.7.2 Coordination of protective devices
  Coordination of various protective devices requires
  consideration of both discrimination and backup
  (cascading) protection.

Clause 2.5.7.2.3 General supply circuit discrimination
  In accordance with Clause 2.5.7.1, to minimize loss of
  supply, discrimination shall be arranged between
  protective devices for outgoing circuits and the upstream
  protective device.
  Downstream devices shall be selected to discriminate with
  upstream devices, using time-current curves.


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                      SECTION 2




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                SECTION 2




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                       SECTION 2


Clause: 2.6.1 RCD protection - General
  The use of fixed setting RCDs with a rated operating
  residual current not exceeding 30mA, is recognized as
  providing additional protection in areas where excessive
  earth leakage current in the event of failure of other
  measures of protection or carelessness by users could
  present a significant risk of electric shock.




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                        SECTION 2


Clause: 2.6.2.3 Protection against initiation of fire

  Although not a mandatory requirement of this Standard, to
  provide additional protection against the initiation of fire
  caused by leakage current across insulation, a Type S RCD
  with a rated residual current in the range of 100 mA to 300
  mA may be used as a main switch in a domestic
  installation.




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                        SECTION 2
Clause: 2.6.2.4 Arrangement
  Where RCDs are required in accordance with Clause 2.6.3
  the circuits shall be arranged as follows:
  (a) Not more than 3 final subcircuits shall be protected by
       any one RCD; and
  (b) Where –
       (i)      the number of RCDs exceeds 1; and
       (ii)     more than 1 lighting circuit is installed;
                lighting circuits shall be distributed between
                RCDs.
  (c) In domestic installations having more than 1 final
       subcircuit, a minimum of 2 RCDs shall be installed.

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                        SECTION 2
Clause: 2.6.3.1 Residential electrical installations

  RCDs are required for socket outlets and lighting circuits
  in residential electrical installations. And also for: —
  (c) directly connected hand-held (Cl.1.4.8) electrical
        equipment, eg directly connected hair dryers or tools;
  forming part of –
  (i) individual domestic installations; or
  (ii) residential areas of other electrical installations
        (motels, hospitals etc); or
  (iii) multiple residential electrical installations that are
        provided for common use;

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                        SECTION 2

Clause: 2.6.3.1 (continued)
  Exceptions:
  Sockets outlets located in a home dialysis installation shall
  be protected in accordance with Clause 2.6.3.3.

Clause: 2.6.3.3 Home dialysis installations
  In accordance with AS/NZS 3003 medical equipment used
  in home dialysis installations shall be:
  (a) supplied by a dedicated circuit; and
  (b) protected by a 10mA RCD positioned so that it may
       be reset by the patient while under treatment.


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                       SECTION 2


Clause: 2.6.3.2 Other electrical installations
  Additional protection by 30mA RCDs shall be provided
  for final subcircuits supplying —
  (a) socket outlets having a rated current not exceeding
       20A; and
  (b) one or more lighting points and having a rated current
       not exceeding 20A; and
  (c) directly connected hand-held electrical equipment.



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                        SECTION 2

Clause: 2.6.3.2 (continued)
  Note: The final subcircuits referred to in Item (b) include,
  without limitation, those supplying the following:
  (a) External lighting installations, such as bollard-type
        luminaires; and
  (b) Illuminated signs; and
  (c) Ground mounted lighting for the illumination of
        public features.
Exception: Where disconnection could cause a dangerous
            situation. E.g. Traffic lights.



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                       SECTION 2

Clause: 2.6.3.4 Alterations, additions and repairs
    Socket outlets added to an existing circuit shall be
    protected by an RCD.
Exception:
(a) Where socket outlets or lighting points are not RCD
    protected are replaced, including the replacement of a
    single outlet with a multiple.
(b) Extensions to circuits supplying lighting points only,
    provided the existing circuit is not RCD protected.



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                      SECTION 2
                    Clause 2.9.2.5 (k)




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          PART 2 – SECTION 3
SELECTION AND INSTALLATION OF WIRING
              SYSTEMS

Clause: 3.5.2(b)(ii) Neutral conductor – Multiple phase
  The current carrying capacity of the neutral conductor of
  multiphase consumers mains, submains or final subcircuit
  shall be not less than that of the current carrying capacity
  of the largest associated active conductor.
Exception 2:
  Current carrying capacity of the neutral can be lower if
  detection device fitted.



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                        SECTION 3


Clause: 3.6.2 Voltage drop
  Voltage drop remains at 5% with several exceptions. The
  most common exception is shown below.
Exceptions:
  3. Where the point of supply is the low voltage
       terminals of a substation located on the premises
       containing the electrical installation and dedicated to
       the installation, the permissible voltage drop may be
       increased to 7%.


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                        SECTION 3

Clause: 3.9.3.2 Suspended ceilings
(a) Wiring systems may be supported by the suspended
    ceiling system unless this is not permitted by the
    suspended ceiling manufacturer; and
(b) Cables shall be provided with additional protection
    against mechanical injury where in contact with
    conductive ceiling support runners (Cl. 3.3.2.6); and
(c) Wiring systems installed above suspended ceilings shall
    be fixed at suitable intervals to prevent undue sagging of
    cables.
Note 2: National Building Codes may restrict use of
       suspended ceilings to support services.

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                      SECTION 3




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                        SECTION 3
Clause: 3.11.4.4 & TABLE 3.6 U/G wiring systems




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                       SECTION 3




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                       SECTION 3




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                       SECTION 3
Clause: 3.11.4.5 Identification of U/G wiring systems
    Underground wiring systems shall be identified by an
    orange marker tape complying with AS/NZS 2648.1 and
    positioned at approximately 50% of the depth of cover
    above the wiring system or any additional mechanical
    protection.
Exception:
    Underground wiring systems installed by boring,
    provided the location is marked and recorded in a readily
    available permanent location. If a pipe is retained after
    the boring operation, orange-coloured pipe or conduit is
    recommended.


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                        SECTION 3

Clause: 3.11.4.6  Marking and recording of U/G cable
                  location
    The presence of U/G wiring shall be marked and
    recorded as follows:
(a) Permanent cable marker signs shall be provided to
    indicate the point where a cable enters or leaves a
    structure;
Exception:
    Cable entry signs need not be provided where the
    position of U/G cable entry into the ground is obvious.



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                        SECTION 3

Clause: 3.11.4.6   Marking and recording of U/G cable
                   location (continued)
    or
   The route shall be recorded on a plan to enable future
    location. This plan shall be located at the switchboard
    from which the circuit originates. The plan locating the
    consumers mains shall be kept at the main switchboard.




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             PART 2 - SECTION 4
      SELECTION AND INSTALLATION OF
       APPLIANCES AND ACCESSORIES
Clause: 4.5.2.3 Recessed luminaires
    Recessed luminaires and their auxiliary equipment shall
    be installed in a manner designed to minimize
    temperature rise and prevent the risk of fire.
    This requirement shall be satisfied by one of the
    following methods:
(a) The use of a luminaire specifically designed and
    certified by the manufacturer to permit –
    (i) contact with combustible materials; or
    (ii) enclosure or covering by thermal insulation, as
         appropriate to the location of the luminaire.

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                        SECTION 4
Clause: 4.5.2.3 Recessed luminaires (continued)

(b) Installation of the luminaire within a fire-resistant
    enclosure.
(c) Provision of required clearances from combustible and
    thermal insulating material as specified by the
    manufacturer of the luminaire.
(d) Provision of the default clearances from combustible and
    thermal insulating material as specified in Figure 4.7.
    Where manufacturer’s installation instructions that
    specify required clearances are not available the
    luminaire shall be installed in accordance with (b) or
    (d).


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                        SECTION 4

Clause: 4.5.2.3 Recessed luminaires (continued)
    Where thermal insulation is of a type that is not fixed in
    position, e.g. loose fill, a barrier or guard constructed of
    fire-resistant material shall be provided and secured in
    position to maintain the necessary clearance (see Figure
    4.7).
    Where thermal insulation may reasonably be expected to
    be installed in the space containing a recessed luminare,
    the luminaire shall be installed in such a manner as to
    provide for the subsequent installation of thermal
    insulation.


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                       SECTION 4




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             SECTION 5 - EARTHING




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                       SECTION 5

Clause 5.5.1.3 Labeling
   The main earthing conductor shall have a permanent label
   attached at the connection to the earth electrode with a
   legible warning against disconnection in the following
   form:
   WARNING: ‘MAIN ELECTRICAL EARTHING
   CONDUCTOR—DO NOT DISCONNECT’
   Exception: Where the method of connection to the
   electrode precludes disconnection this requirement need
   not apply.



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                      SECTION 5




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                       SECTION 5


Clause 5.6.2.5 Showers and bathrooms

   Any conductive reinforcing within a concrete floor or
   wall forming part of a shower or bathroom shall be
   bonded to the earthing system of the electrical installation
   to avoid any potential differences that may occur between
   conductive piping (including taps, drain, etc) connected
   to, or in contact with, the electrical installation earthing
   system and the concrete floor or wall.




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                       SECTION 5



Clause 5.6.2.5 Showers and bathrooms (continued)
   An equipotential bonding conductor, in accordance with
   Clause 5.6.3, shall be connected between the reinforcing
   material and any part of the earthing system within the
   room.

   Note: Clause 5.6.3.2(b) requires 4mm2 conductor.




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                  PART 2 - SECTION 6
                  DAMP SITUATIONS

Clause 6.7 Sanitization and general hosing-down operations
       Electrical installations where the requirements of this
       clause may apply include, without limitation, food
       production or processing areas and agricultural or
       horticultural premises, such as rooms, locations or
       areas where —
   (a) livestock are kept; or
   (b) feed, fertilizers, vegetable or animal are produced,
       stored, prepared or processed; or



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                       SECTION 6

Clause 6.7 Sanitization and general hosing-down operations
(continued)

 (c) Plants are grown, such as greenhouses or hydroponic
     installations; or
 (d) Agricultural or horticultural products are produced,
     prepared or processed, e.g. dairies, drying, stewing,
     pressing out, fermenting, butchering, meat processing,
     etc.
 Clause 6.7.4.4. Switchboards shall have IPX6 enclosures.



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            PART 2 - SECTION 7
   SPECIAL ELECTRICAL INSTALLATIONS

Clause 7.3 Electrical Generation Systems

   New Clause covering:
   (i) Engine-driven generator sets;
   (ii) Stand-alone power systems, e.g. photovoltaic, wind
         turbine etc;
   (iii) Grid-connected inverter systems.




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                       SECTION 7

Clause 7.3.5.2.2 - RCDs

 Where an electricity generation system includes an inverter,
 the RCD shall be of a type suitable for the waveform of the
 particular inverter, and in accordance with the inverter
 manufacturer’s instructions.

 Note: Requirements for types of RCDs are set out in Clause
 2.6.2.2.



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                        SECTION 2


Clause 2.6.2.2 – Types of RCDs
States in part:
   In Australia, an RCD shall be of the type that tripping is
   ensured when the waveform is sinusoidal.
Note:
1. The possible waveform of a fault current to earth can
   affect the operation of an RCD and shall be taken into
   account for the selection of the type of RCD.



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                      SECTION 7




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                      SECTION 7




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                      SECTION 7

Clause 7.8 – Specific Electrical Installation Standards

This Clause outlines those Standards that are applicable to
specific electrical installations.
AS/NZS 3001 – Relocatable installations and their site
                     supply;
AS/NZS 3002 – Shows and carnivals;
AS/NZS 3003 – Electromedical treatment areas;
AS/NZS 3004 – Marinas and recreational boats;



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                       SECTION 7

Clause 7.8 – Specific Electrical Installation Standards
(continued)
 AS/NZS 3012 – Construction & demolition sites;
 AS/NZS 3832 – Cold-cathode illumination systems (HV
                    neon);
 AS/NZS 3015 – Telecommunications networks power
                    supplies;
  Installations complying with AS/NZS 3018 (Single
  domestic installations) are deemed to comply with this
  Standard.


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                       SECTION 7

Guidance Standards:
AS/NZS 3010 – Generating sets;
AS/NZS 3014 & 3016 Electric fences
AS/NZS 4249 Film, video & TV sites.

Appendix A contains a list of referenced documents,
compliance with which is called up as a mandatory
requirement for those Standards listed as ―Normative
References‖.



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                    SECTION 8
                   VERIFICATION

Clause 8.3.6.2 Results
The insulation resistance between –
(a) the conductors of consumers mains and submains; and
(b) live and earthed parts of an electrical installation, or
    parts thereof, including consumers mains and submains
shall be not less than 1 MΩ.




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                        SECTION 8

Clause 8.3.9.1 Socket outlets not RCD protected
    The impedance required for automatic disconnection of
    supply to socket outlet circuits not RCD protected shall
    be verified by –
(a) verification of the total resistance (Rphe) of the active
    and protective earthing conductors; or
(b) where supply is available, verification of the earth fault
    loop impedance,
    in accordance with Clause 8.3.9.3. (eg. measurement or
    by using a fault loop impedance test device).
S. 12 Electrical Safety Regulation 2002.

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                      SECTION 8




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                       SECTION 8

Clause 8.3.10 Operation of RCDs
Where supply is available, the function of the RCD shall be
verified by the operation of the integral test device, or by
the use of special test equipment.

Tests shall be performed on each final subcircuit protected
by an RCD to verify that the RCD functions correctly to
disconnect the designated circuit

Clause 8.3.10.3 — The RCD shall disconnect
supply.



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                        SECTION 8

Clause 8.4 Date of initial energisation of an installation

The date of initial energisation of an installation should be
available on-site, either by marking or in an accessible
record.

Either month and year or year only will be acceptable.




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                     APPENDIX C




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                     APPENDIX C




economic growth and social wellbeing through
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                      APPENDIX C


Examples of other Tables in Appendix C:
TABLE C1 – Maximum demand – single & multiple
             domestic;
TABLE C2 – Maximum demand – non-domestic;

TABLE C3 – Maximum demand – Energy demand method
           for non-domestic installations;
TABLE C8 – Guidance on the loading of points per final
           subcircuit.


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                     APPENDIX D




economic growth and social wellbeing through
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                      APPENDIX D


Examples of Tables in Appendix D:

TABLE D1 – Sinking of posts/poles in ground;
TABLE D2 – Force exerted by aerial line conductors;
TABLE D6 – Round hardwood pole - strength ratings;
TABLE D10 – Grade 250 steel pipe strength ratings;
TABLE D12(a) – Grade 350 steel square section strength
               ratings.



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            OTHER NEW APPENDICES

APPENDIX E – Electrical installation requirements in
             National Building Codes (e.g. BCA);
APPENDIX F – Installation of surge protective devices;
APPENDIX G – Degrees of protection of enclosed equipment
             (i.e. IP ratings);
APPENDIX H – WS Classification of wiring systems (i.e.
             fire ratings);
APPENDIX I – Protective device ratings and sizes of
             imperial cables;
APPENDIX J1 – Symbols used in this Standard.


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              WHAT HAPPENS NEXT?

 Electrical work commenced under AS/NZS 3000:2000
  prior to 01/06/2008 may continue;
 Electrical work which has been quoted and a contract has
  been awarded may be performed under AS/NZS
  3000:2000;
 Large projects designed under AS/NZS 3000:2000 (e.g.
  shopping centres) may be performed under that Standard.
 Can be applied immediately, but comes into force in Qld on
  01/06/2008.




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Description: It is only natural that installing electrical wiring for a new home, summer cottage, or addition to existing structures has joined the realm of “Do It Yourself” projects.