Microhmmeter using the four wire Kelvin bridge principle. A lot of the requirements for conductor resistance can be found in BS EN (IEC) 60228. Armour resistance requirements are normally found in the cable specifications themselves.
Flexing tests are used to assess multicore flexible cables liable to be subject to regular flexing during use. The test checks the correct operation of the cable at rated current and voltage and that no short or open circuits occur.
Flexible cable types used on portable equipment and extension leads.
Two pulley moving carrier cycles 30,000 times whilst the cable is loaded with test weights and subject to rated supply current and voltage. The monitoring equipment checks for open circuits and short circuits between conductors or between the conductors and the test frame.
Main standard for PVC wire and cable commonly used in final circuits in UK buildings, including the familiar "flat twin and earth" and "meter tails".
Commonly known as PVC twin and earth, 6242Y, 6243Y.
British Standard type of “soft skin” fire resistant screened cables commonly used with fire alarms and emergency lighting.
Commonly known as fire alarm / emergency lighting cable / soft skin fire alarm cable.
Fire resisting armoured power cables with low smoke halogen free (LSHF) sheathing, and enhanced circuit integrity properties.
Commonly known as fire resistant SWA, fire alarm / emergency lighting cable / soft skin fire alarm cable.