Rcbo's tripping times

[jimmy84]

I am testing a new build installation of 90 flats all the flats have 1 16a Rcbo when I test the tripping times I get a higher reading at 5x than 1x on all 90 flats they r all wylex can anyone help me on this matter

 

[Plonker 3]

Do the times meet what is required for the earthing system?

 

[Leesparkykent]

What times are you getting?

 

[jimmy84]

Yes time comply with current regs but unsure y I'm getting these times

 

[Guest77]

Yes time comply with current regs but unsure y I'm getting these times

hello mcfly hello, what times are you getting ??????

 

[jimmy84]

Times r 16 Ms 1x and 18.7 ish for 5x

 

[trev]

So if they comply. what the almighty bloody hell are you concerned about?
Good grief!

 

[Geordie Spark]

hello mcfly hello, what times are you getting ??????

Evening Mark! :wink_smile:

Quarter past six.

 

[Guest77]

Times r 16 Ms 1x and 18.7 ish for 5x

did you check the times at 0 degrees and 180 degrees?

 

[Guest77]

Evening Mark! :wink_smile:

Quarter past six.

Evening fella.

 

[jimmy84]

Yes but took max readings never come across this before

 

[Guest77]

Yes but took max readings never come across this before

Of course I understand your post, it is out of sync although well withing regs, I would have ramp tested them myself after to see what the actual trip time were, I would suggest at a guess 20-22 was the reading in ms.

 

[Leesparkykent]

I know it maybe a bit of a stupid question, but where are you carrying out the RCD test? At the terminals?

 

[jimmy84]

No been testing at the socket

 

[Guest77]

No been testing at the socket

Have you got a hard hat?

 

[trev]

No been testing at the socket

Oh dear, don't you know the proper way to test these things?

 

[davesparks]

No been testing at the socket

Go back and carry out the test correctly and then see what the results are

 

[jimmy84]

Will test at terminals but never had this before testing at the socket thanks for ur help

 

[davesparks]

Will test at terminals but never had this before testing at the socket thanks for ur help

You test at the terminals with the outgoing cables disconnected, otherwise any leakage will adversely affect the test and cause it to trip faster and may pass when it should fail.

 

[atm84]

I've had this problem before and put it down to them being at different degrees.