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EKAS 2.1.5.1 Power cable and conductor terminations. UEE31307 Certificate III in Refrigeration and Air Conditioning Stage 2A Units: UEENEEPOO1B Chris Hungerford Thursday, August 28, 2014. Functions of a cable gland.

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EKAS 2.1.5.1Power cable and conductor terminations

UEE31307 Certificate III in

Refrigeration and Air Conditioning

Stage 2A

Units: UEENEEPOO1B

Chris Hungerford

Thursday, August 28, 2014

functions of a cable gland
Functions of a cable gland
  • Hold the cable into positions so that no undue mechanical stress is placed on the terminations.
  • Limits the spread of fire.

Cable glands can be designed to perform these functions:

          • Dust protection
          • Water tight seal.
          • Explosion protection.
          • Vermin proof.

2.1.5.1.A

cable glands
Cable Glands
  • General Purpose Weatherproof Glands for Armoured Cable
  • General Purpose Weatherproof Glands for Unarmoured Cable
  • Cable Glands for Braided EMC Shielded Cable

2.1.5.1.A

cable glands1
Cable Glands
  • PVC Cable Gland Shrouds
  • Metal Locknuts
  • Metal Earth Tags
  • NYLON CABLE GLANDS (IP68)

2.1.5.1.A

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AS/NZS-3000:2007, SAA Wiring Rules

3.7 ELECTRICAL CONNECTIONS

3.7.1 General

Connections between conductors and between conductors and otherelectrical equipment shall provide electrical continuity andadequatemechanical strength.

2.1.5.1.B

solderless lugs
Solderless lugs

Ross - Courtney lug.

Stanco lug

2.1.5.1.B

crimps
Crimps

Terminating - crimp lugs.

Joining cables of the same size - crimp links.

When crimping it is important that the correct crimp type lug for the cable and the correct tool for that lug is used.

AS/NSZ 3000 cl 3.7.2.3.2

2.1.5.1.B

terminal connections
Terminal connections

AS/NZS 3000 cl 3.7.2.4

Blue point connectors (BP)

Line taps.

Articles terminals.

Terminal strips.

Bolted & clamp connectors

2.1.5.1.B

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AS/NZS-3000:2007 SAA Wiring Rules

3.7.2.7 Soldered connections

Where a soldered connection is used the design shall take account ofcreep, mechanical stress and temperature rise under fault conditions.

2.1.5.1.B

conductor colouring as nzs 3000 table 3 4
Conductor colouringAS/NZS 3000 Table 3.4

Colour

Function

Earth/bonding

Green/yellow

Neutral

Black

Light blue

Active

Red Brown, dark Blue, Grey, White, any colour other than green/yellow, green, black, yellow or light blue

2.1.5.1.C

stripping of insulation
Stripping of Insulation.
  • Avoid using a knife on smaller cables.
  • Tear the insulation off, don’t cut.
  • Do not indent any conductor material.
  • Be sure not to remove excessive insulation.
  • Remake any damaged insulation.
  • The only connection for an extension lead is via an approved plugtop and socket.

2.1.5.1.C

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AS/NZS-3000:2007 SAA Wiring Rules

3.7.2.2 Preparation for connection

The insulation on a conductor shall not be removed any further than isnecessary to make the connection.

For connections between insulatedconductors the connection shall be insulated to provide a degree ofinsulation not inferior to that of the conductors.

Any damaged insulationshall be reinstated.

2.1.5.1.C

insulation of conductors
Yes

Electrical insulation tape

Epoxy kits

Heat shrink

No

Masking tape

packing tape

sticky tape

silicon mastic

Insulation of conductors

2.1.5.1.C

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AS/NZS-3000:2007 SAA Wiring Rules

3.7.2.6 Mechanical stress

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

2.1.5.1.C

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AS/NZS-3000:2007 SAA Wiring Rules

3.7.2.3.1 Loosening of connections

Connections shall be made so that no loosening is likely because of vibration,alteration of materials or temperature variations towhich the connections

are likely to be subjected in normal service.

2.1.5.1.C

terminations and connections
Terminations and connections
  • Connections must not be soft soldered before compression terminations.
  • Must be seated correctly.
  • Free of dirt and oxides.
  • Use a suitable lug or connector.
  • Insulated to the equivalent of the original insulation.
  • Earth connection must be painted if exposed to weather

2.1.5.1.C

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Further readings

Questions Topic 7 Q1-Q23

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