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Telephone Cable

Telephone cable on this page is Mercury cable sold in 100m lengths. Choose the 804.856UK flat profile cable, which has four stranded pure copper cores and a white sheath, or one of the economy telephone cables, which use a solid copper clad steel conductor with colour coded insulation and come as a 4 core cable or with 3, 4 or 6 pairs. Each cable fits RJ11, RJ12 and RJ45 type connectors.

Choosing Telephone Cable

Choose the conductor first, then the number of cores or pairs the job needs, and finally the plug you plan to fit.

Pure copper flat profile cable

The 804.856UK is a low profile telephone and data cable made from pure copper. The 804.856UK strand count is 4 x (7 x 0.15mmØ), so its 4 cores are made of seven 0.15mm strands apiece. The sheath is white.

Economy copper clad steel cable

The economy telephone cables have a solid copper clad steel (CCS) conductor rather than pure copper, and the insulation on these cables is colour coded. The 808.211UK is the 4 core version with a 3.6mm diameter. The 808.213UK has 3 pairs, the 808.215UK has 4 pairs and the 808.217UK has 6 pairs.

Cores, pairs and connectors

Count the conductors your outlets and equipment use before you order, then pick the cable that matches. The 804.856UK and 808.211UK have 4 cores, and the other three economy cables have 3, 4 or 6 pairs. Every cable here fits standard RJ11, RJ12 and RJ45 type connectors.

CableConductorSizeLength
804.856UKPure copper, stranded4 cores, flat profile100m
808.211UKSolid CCS4 core, 3.6mm diameter100m
808.213UKSolid CCS3 pairs100m
808.215UKSolid CCS4 pairs100m
808.217UKSolid CCS6 pairs100m

Related categories

Ready-made leads are in RJ11 telephone leads, plugs are in RJ45 connectors, and network cable is in network and data cable. See the Mercury cables range and the wider cables range.

Brands we stock in Telephone Cable

Mercury.

Frequently asked questions

What is pure copper telephone cable?

Pure copper telephone cable has copper conductors, while copper clad steel (CCS) cable has a steel conductor clad in copper. The Mercury 804.856UK flat profile cable has 4 stranded pure copper cores of seven 0.15mm strands each, a white sheath and a 100m length. The Mercury 808.211UK, 808.213UK, 808.215UK and 808.217UK economy cables use a solid copper clad steel conductor instead.

What is the conductor in the economy telephone cable?

The economy telephone cables have a solid copper clad steel conductor, often shortened to CCS, with colour coded insulation. This applies to the 808.211UK 4 core cable and to the 808.213UK, 808.215UK and 808.217UK, which have 3, 4 and 6 pairs. All four come in a 100m length.

Can RJ11 and RJ45 plugs be fitted to this cable?

Yes, telephone cable takes RJ11 and RJ45 plugs where it is compatible with those connectors. The Mercury 804.856UK is compatible with RJ11, RJ12 and RJ45 connectors, and the Mercury economy cables fit standard RJ11, RJ12 and RJ45 type connectors. Choose a plug to suit the socket or equipment it will connect to.

How are telephone cable pairs counted?

A telephone cable pair is two cores, so a 3 pair cable has 6 cores and a 6 pair cable has 12. The Mercury 808.213UK has 3 pairs, the 808.215UK 4 pairs and the 808.217UK 6 pairs, while the 808.211UK has 4 cores, or 2 pairs. The 804.856UK flat profile cable has 4 cores, and all five come in a 100m length.

What is flat telephone cable?

Flat telephone cable is telephone and data cable with a flat, low profile sheath. The Mercury 804.856UK is a flat profile cable with 4 pure copper cores, stranded from seven 0.15mm strands each, and a white sheath. It comes in a 100m length and fits RJ11, RJ12 and RJ45 connectors.

  • Established 1975
  • Birmingham trade counter
  • UK-only supply

Written by the West Midlands Electrics technical team

Updated

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