Steel Wire Armoured Cable - SWA BS6724 Cable

SWA BS6724 Cable

The construction of an SWA cable, however, does depend on the intended use of the cable. When the power cable needs to be installed in a public area, for example, a Low Smoke Zero Halogen (LSZH) equivalent, called SWA BS6724 Cable must be used. After the King’s Cross fire in London in 1987 it became mandatory to use LSZH sheathing on all London Underground cables – a number of the fatalities were due to toxic gas and smoke inhalation. As a result, LSZH cables are now recommended for use in highly populated enclosed public areas. This is because they emit non-toxic levels of Halogen and low levels of smoke when exposed to fire. SWA Cable BS6724 – which meets the requirements of British standard BS6724 – has LSZH bedding and a black LSZH sheath.