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College > Types Of Cables > Flashcards

Types Of Cables Flashcards

1
Q

What factors affect what cable you should install?

A
  1. The wiring system already in place.
  2. Moisture.
  3. Temperature.
  4. Possible impact damage.
  5. Possible explosive atmosphere.
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2
Q

What are thermoplastic cables?

A

These are cables that can be reheated and reshaped multiple times.

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3
Q

What are thermosetting cables?

A

These cables cannot be reshaped once they have been set they cannot be changed.

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4
Q

What is the operating temperature of thermoplastic cables?

A

70oC

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5
Q

What is the operating temperature of thermosetting cables?

A

90oC

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6
Q

What is the proper name for twin and earth cable?

A

PVC/PVC Twin and CPC Cable.

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7
Q

Where is twin and earth cable usually used?

A

Domestic installations.

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8
Q

Where do you usually run twin and earth cables.

A

Buried in walls, or under floorboard but it can also be in trunking.

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9
Q

What does PVC stand for?

A

PolyVinylChloride.

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10
Q

What is PVC used for in cables?

A

For outer sheaths and insulation on certain cables.

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11
Q

What type of cable is twin and earth?

A

Thermoplastic cable.

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12
Q

What is the smallest size twin and earth cable you can get?

A

1mm2

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13
Q

What is the largest sized twin and earth cable you can get?

A

16mm2

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14
Q

D

A

D

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15
Q

How big will the CPC be on twin and earth cable?

A

Unless the cable is 1mm2 the CPC will always be smaller than the other conductors.

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16
Q

What colour is low smoke cable?

A

White.

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17
Q

What is the name for low smoke cable?

A

LSZH or Low Smoke Zero Halogen.

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18
Q

What does LSZH stand for?

A

Low Smoke Zero Halogen.

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19
Q

What is the maximum operating temperature of twin and earth cable?

A

70oC

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20
Q

Where are XLPE cables used?

A

These cables are used as the final connection to a water heater.

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21
Q

What cables are used as the final connection to water heaters?

A

XLPE cable.

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22
Q

What temperature can XLPE cable last to?

A

90oC

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23
Q

How much mechanical protection does PVC single cables provide?

A

Not much, they require additional protection usually via conduit.

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24
Q

What additional protection do PVC singles require?

A

Usually conduit. PVC or metal

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25
Q

Why does PVC single cables require additional protection?

A

Because there is no outer sheath for the additional protection

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26
Q

What is the operating temperature of PVC Single cables?

A

70oC

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27
Q

D

A

D

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28
Q

Where is white flexible cable usually used?

A

In domestic installations where you can see the cable.

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29
Q

What is the maximum operating temperature of white flexible cable?

A

This depends on the cables rating as there are different variants.

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30
Q

What size is the earth on white flexible cable?

A

It will always be the same size as the conductors.

31
Q

What is considered a flexible cable and what is considered a flexible cord?

A

Up to and including 4mm2 is a flexible cord anythig bigger is a flexible cable.

32
Q

What does SWA stand for?

A

Steel Wire Armoured.

33
Q

What is another name for SWA cable?

A

Steel wire armoured or “Armoured Cable”

34
Q

What do you use as the CPC on SWA cable?

A

The steel armouring can be used as the CPC.

35
Q

How much mechanical protection does SWA cable provide?

A

high mechanical protection because of the steel armour.

36
Q

Where is SWA cable used?

A

Mostly in industry but it’s also used to provide a supply to a sub supply.

37
Q

What cable don’t you need to use an RCD with and why?

A

SWA Cable because the outer sheath should be connected to earth.

38
Q

What is the operating temperature of SWA cable?

A

90oC

39
Q

Is SWA cable a thermosetting or thermoplastic cable?

A

Thermosetting.

40
Q

Is white flexible cables a thermosetting or thermoplastic cable?

A

Depends on what one you buy as there is different types.

41
Q

Are single PVC cables a thermosetting or thermoplastic cable?

A

Thermoplastic.

42
Q

Is XLPE cable a thermosetting or thermoplastic cable?

A

Thermosetting.

43
Q

Is twin and earth cable a thermosetting or thermoplastic cable?

A

Thermoplastic.

44
Q

What is another name for mineral insulated cable?

A

Pyro or MICC cable.

45
Q

What is another name for pyro?

A

MICC or Mineral insulated cable.

46
Q

What is another name for MICC?

A

Pyro or Mineral insulated cable.

47
Q

What is orange Pyro used for?

A

General use.

48
Q

What is white Pyro used for?

A

Emergency lighting.

49
Q

What is red Pyro used for?

A

Fire alarms.

50
Q

What is the maximum operating temperature of Pyro?

A

Up to 1000oC

51
Q

Where is Pyro most commonly used?

A

It is most commonly used in emergency or high risk environments. It can also be used in listed buildings.

52
Q

What sized conductor would you choose when using Pyro over standard cables.

A

You would choose a smaller cable because of the mineral insulation.

53
Q

How much mechanical protection is given with MICC?

A

This has very high mechanical protection, it can maintain the gap between the cables even when it is completely flattened.

54
Q

How long does MICC cable last?

A

It is non ageing.

55
Q

What is the mineral used in MICC cable?

A

Magnesium oxide powder.

56
Q

What does FP stand for in FP cable?

A

Fire protection.

57
Q

What is another name for Fire Proof cable?

A

FP cable, usually FP 200.

58
Q

What does the number after FP mean?

A

The higher the number the higher the fire protection rating.

59
Q

Up to what temperature will FP cable last

A

It will last up to 830oC.

60
Q

Where is FP cable used?

A

In emergency systems. Mostly for fire alarms.

61
Q

What is the metal interior of FP cable used for?

A

Mechanical protection and fire protection.

62
Q

How much mechanical protection does FP200 cable have?

A

A high level of protection.

63
Q

What is a data cable commonly called?

A

A Cat cable

64
Q

What does “UTP” stand for in data cables?

A

Unshielded twisted pair.

65
Q

What is the abbreviation for “unshielded twisted cables”?

A

UTP cables.

66
Q

Why are data cables shielded and twisted together?

A

This is done to prevent cables getting interference between band 1 and band 2 cables.

67
Q

What does “STP” stand for in data cables?

A

Shielded Twisted Pair.

68
Q

What is the abbreviation for “shielded twisted pair cables”?

A

STP.

69
Q

What is an SCTP cable?

A

This has an earthed shielded screen inside the cable to further protect against interference.

70
Q

How do data cables transfer data?

A

Via electricity.

71
Q

What do you connect data cables to?

A

An RJ45 connector.

72
Q

How do Fibre Optic cables transfer data?

A

By using light refracting down the cable, transferring binary information.

73
Q

Why can’t you look down a fibre optic cable?

A

If the other end is made off there is a chance you can be blinded from the light in the cable.

74
Q

What is a fibre optic cable made of?

A

Glass.

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