hello could somebody please help me...I i was wondering what the maximum length for a lighting circuit wired in 1.5mm sq cable protected by a 6 amp mcb...also the maximun length of a ring final circuit wired in 2.5mm sq protected by a 32 amp mcb.
A ring may serve up to 100 m sq of floor area and, in theory, may have any number of sockets outlets or fused connection units directly connected to it. There is a limit to the length of cable permissible in a ring circuit. Assuming that the surrounding temperature does not exceed 30 degrees centigrade and that cables are not bunched together or covered with insulation of any kind, this is 68 metres for circuits protected by a cartridge fuse and for circuits protected by an MCB.
With 1 mm sq. cable, one circuit may serve up to 1200 Watts and must not exceed 83 m of cable length measured without the switch length. However, where there are long cable lengths, use 1.5 mm sq. cable instead which allows a maximum cable length of 126 m measured without the switch length
could somebody tell me if these statements are true please
A ring may serve up to 100 m sq of floor area and, in theory, may have any number of sockets outlets or fused connection units directly connected to it. There is a limit to the length of cable permissible in a ring circuit. Assuming that the surrounding temperature does not exceed 30 degrees centigrade and that cables are not bunched together or covered with insulation of any kind, this is 68 metres for circuits protected by a cartridge fuse and for circuits protected by an MCB.
With 1 mm sq. cable, one circuit may serve up to 1200 Watts and must not exceed 83 m of cable length measured without the switch length. However, where there are long cable lengths, use 1.5 mm sq. cable instead which allows a maximum cable length of 126 m measured without the switch length
could somebody tell me if these statements are true please