Vulcanized India Rubber Cable
Tail rubber insulation tends to disintegrate and muck accumulates on cable ends causing leakage.
Vulcanized india rubber cable. Comes in 2 forms. It is then covered with cotton tape and cotton braiding. Tough rubber sheathed trs vulcanized rubber insulated vri cables. These type of wires are used in 250v cts wiring casing or capping or cleat wiring and conduit wiring.
The conductors are covered by vulcanized india rubber. Vir wires are available in sizes like 1 18 3 20 7 20 7 16 and 19 16. Indian rubber cables were used in australia from the turn of the last century to the 1950s. Its main drawback is that sulphur reacts very quickly with copper and for this reason cables using vir insulation have tinned copper conductor.
Vulcanized india rubber has greater mechanical strength durability and wears resistant property than pure rubber. The thickness of the vulcanized indian rubber depends on the voltage. Vir vulcanised indian rubber electrical cables b efore the introduction of pvc the majority of electrical cables used had vulcanised india rubber vir for insulation and protection. Vulcanised india rubber insulated cable.
Its main drawback is that sulfur reacts very quickly with copper and for this reason cables using vir insulation have a tinned copper conductor. If you are living in a home that has not been inspected in some time it could be possible that the cables that can be found throughout your home may actually be made up of vir cables. Reliance electricals top electrical shop in coimbatore and offers electrical goods cables wires switches switchgear industrial fan led light emergency light tube light decorative light table fan copper wire dealers wholesalers distributors suppliers in coimbatore. Finally it is dipped in bitumen compound.
Vulcanised indian rubber or cables that were used throughout australia up until the 1950s. Wires vulcanized india rubber in this type of wire a tinned copper conductors or aluminum conductors are used. Vir vulcanised indian rubber. Prior to the use of pvc insulated cables becoming common in the 1960s most cables installed in domestic dwellings were of the rubber insulated tough rubber sheathed trs type.
Vulcanized india rubber has greater mechanical strength durability and wear resistant property than pure rubber. The vir insulation is generally used for low and moderate voltage cables. Along with imperial t e one of the most common historic wiring cables still in use. Here a 3 20 wire means numerator 3 denotes the number of conductors used and the denominator 20.
The vir insulation is generally used for low and moderate voltage cables. The vir cables were used in the majority of the wiring in properties and on the whole did not have an earth wire attached the continuous protective circuit.