J
Jordanh1992
A BS 88 fuse protects a 20A radial socket outlet circuit. The circuit is wired using 2.5mm2 single core cable installed in a 16m length of PVC conduit. A separate protective device conductor consisting of a 1.0mm2 PVC cable is used. Assuming that no correction factors are applicable and that the value of Ze is given as 0.5 ohms, determine whether the circuit complies with IET wiring regulations for shock protection? The nominal voltage (Uo) may be taken as 230 volts.
How do I figure out if the maximum disconnection time is 0.4 or 5 seconds, so then I can work out what the maximum Zs allowed for a 20a BS 88 fuse is...
Ze = 0.5 ohms
R1 + R2 = 25.51 (table 11 OSG)
Mf = ???
L = 16mm2
Any little tips you guys could give me, I'm new to all this so go easy!
Thanks
How do I figure out if the maximum disconnection time is 0.4 or 5 seconds, so then I can work out what the maximum Zs allowed for a 20a BS 88 fuse is...
Ze = 0.5 ohms
R1 + R2 = 25.51 (table 11 OSG)
Mf = ???
L = 16mm2
Any little tips you guys could give me, I'm new to all this so go easy!
Thanks