Wiring cable conductors are stranded, high conductivity plain annealed copper wires meeting the requirements of class 2 in BS 60228 specifications for “Conductors in insulated cables and cords”. Wiring cables with solid copper conductors are offered up to 2.5mm2.
INSULATION The insulation of standard wiring cables is PVC grade Type TI 1 of BS 7655 (formerly BS 6746) suitable for a maximum continuous conductor operating temperature of 70?C. Where specifically required, wiring cables can be offered with heat resistant PVC insulation, Type TI 3 (90?C). CORE IDENTIFICATION Unless specifically agreed otherwise, insulation colors are in ac More info
INSULATION The insulation of standard wiring cables is PVC grade Type TI 1 of BS 7655 (formerly BS 6746) suitable for a maximum continuous conductor operating temperature of 70?C. Where specifically required, wiring cables can be offered with heat resistant PVC insulation, Type TI 3 (90?C). CORE IDENTIFICATION Unless specifically agreed otherwise, insulation colors are in accordance with BS 6004 specifications as follows: Single Core: Red, Black, Blue, Green/Yellow, Brown, Grey. Note: Insulation colors other than the above may be manufactured on customer request. FINISH Wiring cables have a smooth finish and are continuously marked with DUCAB by printing or embossing on the external surface. VOLTAGE RATINGS The non-sheathed general purpose type 6491X cables are rated 450/750V (450V to earth, 750V between conductors). These cables are considered suitable for fixed protected installations in lighting fittings and inside appliances, switchgear and control gear for voltages up to 1000V a.c. or up to 750V to earth d.c.. CURRENT CARRYING CAPACITIES AT AMBIENT TEMPERATURE 30?C The tabulated current carrying capacities relate to continuous loading and are also known as the “full thermal ratings” implying that the cables will operate at their maximum conductor continuous temperature of 70?C. The data is extracted from IEE Wiring Regulations (BS 7671). The tabulated current rating capacities also relate to installations where the overload protection is afforded by a fuse to BS 88 or BS 1361 or a miniature circuit breaker. Where the conductor is protected by a semi-enclosed fuse to BS 3036, the size of the conductor is to be such that its tabulated current carrying capacity is not less than the value of the fuse rating adjusted by multiplier 1.38 in addition to the correction factors for ambient temperature, thermal insulation and grouping. For details refer to IEE Wiring Regulations.