Is there a CCC comparison table for old stranded wires anywhere?
I have a domestic installation, about 40 - 50 years old I wd say, and there are only 4 circuits, one is the sockets, with 2 wires into a 3036 30A fuse. I assumed it was a ring but it isnt, its not connected. The break is between the kitchen and rest of the house and theres been a kitchen conversion done, so Im assuming the fitter has bodged the wiring in a junction box somewhere. But is it possible its 2 radials, 1 for kitchen and 1 for the rest? The wire is 7 strand silver colour, so aluminium? but elsewhere in sockets there is a mixture of stranded and solid red and black.
I havent got the means currently to measure each strand (im going to get a micrometer, any suggestions from where?) but the overall wire size compared to a solid 2.5mm does look bigger.
The customer has had no fuse blowing problems (there again he probably wouldnt) but I told him it looks like the ring has been broken and needs re-connecting but I need to check...
The largest R1R2 reading on the circuit is 0.72 ohm and the largest Zs is 1.09.. phew! Ive fitted a dual rcd box, put the two socket wires into one 32A fuse as before temporarily and there are no problems on test results, apart from obviously no ring. No signs of charring at wire terminations either..
I have a domestic installation, about 40 - 50 years old I wd say, and there are only 4 circuits, one is the sockets, with 2 wires into a 3036 30A fuse. I assumed it was a ring but it isnt, its not connected. The break is between the kitchen and rest of the house and theres been a kitchen conversion done, so Im assuming the fitter has bodged the wiring in a junction box somewhere. But is it possible its 2 radials, 1 for kitchen and 1 for the rest? The wire is 7 strand silver colour, so aluminium? but elsewhere in sockets there is a mixture of stranded and solid red and black.
I havent got the means currently to measure each strand (im going to get a micrometer, any suggestions from where?) but the overall wire size compared to a solid 2.5mm does look bigger.
The customer has had no fuse blowing problems (there again he probably wouldnt) but I told him it looks like the ring has been broken and needs re-connecting but I need to check...
The largest R1R2 reading on the circuit is 0.72 ohm and the largest Zs is 1.09.. phew! Ive fitted a dual rcd box, put the two socket wires into one 32A fuse as before temporarily and there are no problems on test results, apart from obviously no ring. No signs of charring at wire terminations either..
