RCD not tripping on test

[spark 68]

Those readings are R1, R2, Rn readings and they look fine to me!

R2 is 66% of R1/Rn

It is r1, r2 and rn for a start on the end to ends, and his r2 is lower than is r1 and rn, it should be 66% higher for 2.5/1.5 T&E

 

[LED Lighting]

It is r1, r2 and rn for a start on the end to ends, and his r2 is lower than is r1 and rn, it should be 66% higher for 2.5/1.5 T&E

Sorry just seen my mistake - sorry!

 

[spark 68]

Deleted: blonde moment Lol

 

[Octopus]

0.19, already answered that

I'm guessing you mean that the Ze is 0.19. Can you set the RCD and does the test button work? I would now venture to suggest that the CPC has a voltage on it.

 

[jmc1683]

sorry mate, you must have joined us late. i already answered everything your asking in the first posts. RCD is setting, test button working, all circuits working fine. checked all connections, swapped RCD....

 

[Octopus]

sorry mate, you must have joined us late. i already answered everything your asking in the first posts. RCD is setting, test button working, all circuits working fine. checked all connections, swapped RCD....

Voltage on the CPC?

 

[dagrat]

It is r1, r2 and rn for a start on the end to ends, and his r2 is lower than is r1 and rn, it should be 66% higher for 2.5/1.5 T&E

Not necessarily, I would agree on an initial verification it should be 1.67 higher, but from what the op says this is an existing installation and the low r2 is probably due to parallel earth paths so not really a problem

 

[Risteard]

well the results from original RCD on DB1,

utility ring
times 1 - 27.2 ms
times 5 - 8.18 ms

downstairs sockets
times 1 - 27.4 ms
times 5 - 7.98

I didnt record the results after i swapped RCD, just that it did trip on test

One RCCB can't have two different trip times.

 

[spark 68]

Not necessarily, I would agree on an initial verification it should be 1.67 higher, but from what the op says this is an existing installation and the low r2 is probably due to parallel earth paths so not really a problem

Agreed, but as this is domestic and subject to being tested properly (end to ends) ie. disconnected at the CU/DB end, you would need at least two parallel paths to lower the reading, it should warrant further investigation to rule this in or out when you do not get the expected readings, especially while fault finding.