Dead Tests - Board Change

[sparkytim]

I like to drop socket/switch plates when testing.Gives a better reading, I can see if earth sleeving is present and can show up loose terminations.

But this can mask compression low insulation faults

Always retest AFTER refixing sockets back.

 

[spinlondon]

But this can mask compression low insulation faults Always retest AFTER refixing sockets back.

Sorry, I obviously didn't make my self clear.

I was refering to testing Zs at each socket.

 

[Nicky Tesla]

if you get a high reading on a socket try flicking the switch back n forth a few times this sometimes clears it. This seems to be the case with sockets on cooker switches a lot for some reason.

 

[Nicky Tesla]

Also it wasnt 2.5 n 1.0 cos it was imperial but simply the equivalent which was originally something gauge. can anyone remember what it was. I know that the earth only has 3 strands which identifies it.

 

[m4tty]

Is it 3/029 for lighting and 7/029 for sockets and 7/036?

 

[PC Electrics]

Also it wasnt 2.5 n 1.0 cos it was imperial but simply the equivalent which was originally something gauge. can anyone remember what it was. I know that the earth only has 3 strands which identifies it.

Are you refering to the circuit with the high r2? if so, how do you know it's imperial? The OP hasn't specified the cable size.

The r2/r1 ratio from Mattys results (2.54) is much closer to that expected of 2.5,1.0 (2.44) than it is to 7/029,3/029 (2.26), all else being equal.

 

[Nicky Tesla]

Are you refering to the circuit with the high r2? if so, how do you know it's imperial? The OP hasn't specified the cable size.The r2/r1 ratio from Mattys results (2.54) is much closer to that expected of 2.5,1.0 (2.44) than it is to 7/029,3/029 (2.26), all else being equal.

It is likely to be 1.0mm if stranded also instead of multiplying by 1.67 you multiply by 2.5 which comes out as 88ohms

also in the previous post ie 3/029 the first number refers to the amount of strands.