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Types Of Cables Flashcards

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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
Why does PVC single cables require additional protection?
Because there is no outer sheath for the additional protection
26
What is the operating temperature of PVC Single cables?
70oC
27
D
D
28
Where is white flexible cable usually used?
In domestic installations where you can see the cable.
29
What is the maximum operating temperature of white flexible cable?
This depends on the cables rating as there are different variants.
30
What size is the earth on white flexible cable?
It will always be the same size as the conductors.
31
What is considered a flexible cable and what is considered a flexible cord?
Up to and including 4mm2 is a flexible cord anythig bigger is a flexible cable.
32
What does SWA stand for?
Steel Wire Armoured.
33
What is another name for SWA cable?
Steel wire armoured or “Armoured Cable”
34
What do you use as the CPC on SWA cable?
The steel armouring can be used as the CPC.
35
How much mechanical protection does SWA cable provide?
high mechanical protection because of the steel armour.
36
Where is SWA cable used?
Mostly in industry but it’s also used to provide a supply to a sub supply.
37
What cable don’t you need to use an RCD with and why?
SWA Cable because the outer sheath should be connected to earth.
38
What is the operating temperature of SWA cable?
90oC
39
Is SWA cable a thermosetting or thermoplastic cable?
Thermosetting.
40
Is white flexible cables a thermosetting or thermoplastic cable?
Depends on what one you buy as there is different types.
41
Are single PVC cables a thermosetting or thermoplastic cable?
Thermoplastic.
42
Is XLPE cable a thermosetting or thermoplastic cable?
Thermosetting.
43
Is twin and earth cable a thermosetting or thermoplastic cable?
Thermoplastic.
44
What is another name for mineral insulated cable?
Pyro or MICC cable.
45
What is another name for pyro?
MICC or Mineral insulated cable.
46
What is another name for MICC?
Pyro or Mineral insulated cable.
47
What is orange Pyro used for?
General use.
48
What is white Pyro used for?
Emergency lighting.
49
What is red Pyro used for?
Fire alarms.
50
What is the maximum operating temperature of Pyro?
Up to 1000oC
51
Where is Pyro most commonly used?
It is most commonly used in emergency or high risk environments. It can also be used in listed buildings.
52
What sized conductor would you choose when using Pyro over standard cables.
You would choose a smaller cable because of the mineral insulation.
53
How much mechanical protection is given with MICC?
This has very high mechanical protection, it can maintain the gap between the cables even when it is completely flattened.
54
How long does MICC cable last?
It is non ageing.
55
What is the mineral used in MICC cable?
Magnesium oxide powder.
56
What does FP stand for in FP cable?
Fire protection.
57
What is another name for Fire Proof cable?
FP cable, usually FP 200.
58
What does the number after FP mean?
The higher the number the higher the fire protection rating.
59
Up to what temperature will FP cable last
It will last up to 830oC.
60
Where is FP cable used?
In emergency systems. Mostly for fire alarms.
61
What is the metal interior of FP cable used for?
Mechanical protection and fire protection.
62
How much mechanical protection does FP200 cable have?
A high level of protection.
63
What is a data cable commonly called?
A Cat cable
64
What does “UTP” stand for in data cables?
Unshielded twisted pair.
65
What is the abbreviation for “unshielded twisted cables”?
UTP cables.
66
Why are data cables shielded and twisted together?
This is done to prevent cables getting interference between band 1 and band 2 cables.
67
What does “STP” stand for in data cables?
Shielded Twisted Pair.
68
What is the abbreviation for “shielded twisted pair cables”?
STP.
69
What is an SCTP cable?
This has an earthed shielded screen inside the cable to further protect against interference.
70
How do data cables transfer data?
Via electricity.
71
What do you connect data cables to?
An RJ45 connector.
72
How do Fibre Optic cables transfer data?
By using light refracting down the cable, transferring binary information.
73
Why can’t you look down a fibre optic cable?
If the other end is made off there is a chance you can be blinded from the light in the cable.
74
What is a fibre optic cable made of?
Glass.

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