Timeguard rcd socket won’t trip with tester. Help please

[dnjr]

Dear All
Installation tncs. Wyler re-wireable fuses
I’ve fitted 2 x timeguard rcd sockets to provide protection for extension leads going outside but neither will trip with my tester. Trip fine on test button
Also trip when I do earth loop test ( fluke tester)
Socket tester says it’s all ok
Zs before I changed to rcd socket was 0.45
Doesn’t trip on ramp test
Ze 0.21
What the hell am I missing

Advise appreciated
Cheers

 

[dnjr]

Agree with Strima, think you may have an IR fault. Have you done that test? Had similar experiences before, RCD not tripping & RCD tripping on Zs test. Both done to IR fault, neutral earth. That said, that was RCD at origin of circuit, but worth considering.

Yep. IR test done before I started
L/e 180m. L/e 179m. Limited l/n as I couldn’t get to dishwasher or washing machine sockets

 

[dnjr]

Agree with Strima, think you may have an IR fault. Have you done that test? Had similar experiences before, RCD not tripping & RCD tripping on Zs test. Both done to IR fault, neutral earth. That said, that was RCD at origin of circuit, but worth considering.

Yep. IR test done before I started
L/e 180m. L/e 179m. Limited l/n as I couldn’t get to dishwasher or washing machine sockets

 

[dnjr]

Dear All
Installation tncs. Wyler re-wireable fuses
I’ve fitted 2 x timeguard rcd sockets to provide protection for extension leads going outside but neither will trip with my tester. Trip fine on test button
Also trip when I do earth loop test ( fluke tester)
Socket tester says it’s all ok
Zs before I changed to rcd socket was 0.45
Doesn’t trip on ramp test
Ze 0.21
What the hell am I missing

Advise appreciated
Cheers

Just been informed I’ve reached 100 posts. Does that mean I can attend the electricians arms. Could murder a pint

 

[Midwest]

Yep. IR test done before I started
L/e 180m. L/e 179m. Limited l/n as I couldn’t get to dishwasher or washing machine sockets

There you go, disconnect DW and see what happens. Try L/N to earth, see what you get (with DW connected).

 

[westward10]

Just been informed I’ve reached 100 posts. Does that mean I can attend the electricians arms. Could murder a pint

Not until you get those sockets to trip

 

[dnjr]

There you go, disconnect DW and see what happens. Try L/N to earth, see what you get (with DW connected).

Why would having that plugged in stop them tripping
Not heard of an appliance stopping rcd tripping

 

[dnjr]

Not until you get those sockets to trip

Harsh

 

[Wilko]

Hi - can I ask which model you're testing? I've seen one that had a weird (to me anyway) separation between the 2 earth connections on the device. If you had that problem your tester would probably not attempt the test, so it's a long shot

 

[Midwest]

Why would having that plugged in stop them tripping
Not heard of an appliance stopping rcd tripping

You learn something every day.

PS The appliances may not cause the RCD, not to trip, but it may cause your MFT, to fail to test the RCD.

 

[Octopus]

Yep. IR test done before I started
L/e 180m. L/e 179m. Limited l/n as I couldn’t get to dishwasher or washing machine sockets

Which is why such appliances should ALWAYS have accessible sockets or isolation switches ....

Just saying

 

[dnjr]

Hi - can I ask which model you're testing? I've seen one that had a weird (to me anyway) separation between the 2 earth connections on the device. If you had that problem your tester would probably not attempt the test, so it's a long shot

View attachment 41331

Hi Wilkinson
Single is TFA01w
Double is TFA05w
Single only had one earth connection
Double had 2 I think as in a standard double socket
Cheers

 

[dnjr]

You learn something every day.

PS The appliances may not cause the RCD, not to trip, but it may cause your MFT, to fail to test the RCD.

Cheers Midwest. Will check that when I’m back

 

[mhar]

Could you have ir'd the new sockets? Some really don't like it

 

[dnjr]

Could you have ir'd the new sockets? Some really don't like it

No. Ir tested before I started remedials ( did an EICR )

 

[Deleted member 9648]

These are timeguard active ones. I wondered if they need a ‘special ‘test but apparently not

If Timeguard sockets are anything like the timeswitches........stopped using their timeswitches because of constant comeback calls. Not used their RCD sockets but would have no confidence in them at all.