Mercury 2 Pair Telephone Cable CCS 100m - White

The Mercury 2-pair telephone cable is a 100m roll of white-jacketed telecommunications cable with four copper-clad steel (CCS) conductors arranged as two twisted pairs. Each conductor measures 0.45mm in diameter with a combined cross-sectional area of 0.16mm² per pair, and the overall cable diameter is 3.6mm. The pairs are colour-coded for straightforward identification during termination.

Designed for residential and light commercial telephone installations, the cable supports one or two phone lines and is compatible with standard RJ11, RJ12 and RJ45 connectors. The white outer jacket keeps installations discreet when surface-run along skirting boards or behind trunking, and the 3.6mm diameter allows the cable to be pulled through tight conduit runs or wall cavities without excessive force. The 100m roll suits multi-room installations or small office setups where several extension points are needed from a single distribution point.

The copper-clad steel construction provides mechanical strength against accidental pulls or snags while maintaining adequate signal performance for voice telephony. CCS conductors are harder and more resistant to stretching than pure copper, making the cable easier to terminate cleanly into screw terminals or punch-down blocks. The 1.8kg roll weight is light enough to handle on a ladder during overhead cable runs.

What connectors does this cable work with?

The 2-pair configuration is compatible with RJ11, RJ12 and RJ45 connectors. For single-line telephone use, RJ11 is the standard UK domestic connector. For two-line systems or more complex setups, RJ12 or RJ45 can be used depending on the equipment.

What's the difference between CCS and pure copper?

Copper-clad steel (CCS) has a steel core with a thin copper coating. It's mechanically stronger and more resistant to stretching than pure copper, making it easier to pull through conduit and terminate cleanly. For voice telephony over typical domestic distances, CCS provides adequate signal performance at lower cost.

How many phone lines can this cable support?

Two pairs support up to two separate phone lines. Each line requires one pair (two conductors). If you only need a single line, the second pair can be left unused or used as a spare for future expansion.

Can this cable be used outdoors?

The white PVC jacket is intended for internal installations. For outdoor runs the cable should be protected inside conduit or trunking rated for external use, as direct UV exposure will degrade the jacket over time.