Thermoplastic (polyvinylchloride) insulated cables are used for general-purpose lighting and power systems.
They have a maximum workingtemperatureof70°C, which governs the cables' ability to carry current, along with their cross-sectional area (CSA).
What is the characteristics of 6491X
Designed for drawing into trunking and conduit systems because the insulation does not provide mechanical protection by itself.
Construction is that of PVC insulated Solid or Stranded copper conductor coloured brown or blue.
What other colours does 6491X come as
Other colours include grey, white and green&yellow stripes for use as a circuit protective conductor (CPC).
The uses of a PVC insulated and unsheathed cables
This cable is used for domestic and industrial wiring and is suitable for service wiring where a circuit protective conductor is required for all circuits and there is little risk of mechanical damage.
What can you do with PVC insulated and unsheathed cables
May be clipped direct to a surface, sunk in plaster or installed conduit or trunking It is the simplest and least expensive cable.
Construction is of one to three core copper, solid or stranded conductors.
The characteristics of a PVC insulated and unsheathed cable
The conductors are covered with a colour coded PVC insulation and then contained in a PVC outersheath which provides minimalprotection from mechanical damage.
What are the colours of a PVC insulated and unsheathed cable
The core colours are brown, blueblack and grey the CPC is uninsulated copper and the outer sheath colour is normally white or grey
The advantages of PVC insulated and unsheathed cable
Cheap to install - (no special techniques needed)
Insulation is waterproof - (not connections)
Long life time - should last 30 yrs of normal service
Easy to install - no special techniques needed
Cheap to buy
The disadvantages of PVC insulated and unsheathed cables
Insulation becomes brittle below 4°C
Insulation becomes soft above 60°C
Poor mechanical strength
Affected by sunlight (become brittle under UV light)
The uses for Single core PVC Insulated sheathed cable
This cable is suitable for surface wiring where there is little risk of mechanical damage
Used as a 'Meter Tail', for connecting the CCU/destitution board to the PES(Public Electricity Supply meter
What is Single core PVC Insulated sheathed cable's construction
PVC Insulated and PVC Sheathing stranded plain copper conductor
The insulation colours are normally grey through other colours are available
SY Cable (Steel wired Braided Flexible)
Instrumentation and control equipment, for tooling machinery production lines, and in flexible applications for free movement without tensile load. Suitable for use in dry, moist and wet rooms
The characteristics of, SY Cable (Steel wired Braided Flexible)
The galvanised steel wire braid serves as protection against mechanical traverse load and acts as a magnetic screen against interference
Sy control cables are not suitable for fixed wiring applications requiring compliance with the regulations set out in BS7671
What does a SWA cable consist of
Multi-core cable consists of PVC or XPLE insulated conductors made from copper or aluminium with a PVC sheath
The next layer is made up of stranded steel wire armour covered with PVC sheath
What are SWA cable used for
Used in main and sub-main supplies, control circuits, etc. It comes in a variety of shapes and sizes
Why clip SWA
SWA is heavier than thermoplastic insulated and sheathed
Extra care must be made when clipping it
Make sure the clipping is not loose otherwise it could bring down a wall, if it was a larger SWA cable
SWA Terminations - parts
Shroud
Earthing ring
Gland body
Gland nut
There are two types of glands: CW(inside) & BW(outside)
Advantages of SWA
Good mechanical strength
Wide variety of choice of types
Can use the armouring as a CPC
Disadvantages of SWA
Expensive to buy
Expensive to install
Large and heavy at times
Requires special terminations
FP200 Cable - Construction
Constructed from a solid or stranded copper conductors covered in silicon rubber insulation
This cable can come with a range of conductors being 2-19 cores
The instillation conductors are covered with a laminated aluminium screen which is bonded to the sheath
The sheath is made of robust thermoplastic low smoke zero halogen which is an excellent moisture barrier
Advantages of FP200 Cable
Fire resistant as to silicon rubber insulation rapidly converts into silicon dioxide, which is a good electrical insulator
The cable is easy to handle and terminate
No special tools are needed in installing and terminating
it has good age resistant insulation
Cable bends easily without using tools. It can be used for the instillation of fire systems and emergency lighting systems
Disadvantages of FP200 Cable
The silicon rubber insulation has not the greatest mechanical strength
The bend radius of FP200 should be closely adhered so to avoid damage to the cable
MICC(Mineral Insulated Copper covered) Hard wiring cable
The inner conductors are made if copper. The outer sheath is also copper, sometimes covered in PVC.
The insulation is magnesium oxide, which is a good insulator, it also keeps the conductors in place
There are two general types of MI - Light gauge which has a thinner outer sheath than heavy gauge
Advantages of MICC
Good mechanical strength
Wide variety of choice over type, can use the armouring as a CPC