Rcd not triping

[Wee wire]

Hi looking a little help. Replaced a consumer unit in a house with a contactum 8way dual rcd split board. After finishing it I tested with rcd tester at 1 time and 5 times with the rcd tripping in correct times. I went to connect up boiler after with the cable dead I cut it but the rcd would not trip. Then at the db I linked out the earth bar and neutral bar and neither rcd tripped to try and see if it would anyone any ideas?

 

[WPD Lad]

Rcd won't trip when it's dead

 

[Wee wire]

But not even with a n to e fault

 

[WPD Lad]

But not even with a n to e fault

Its not really a fault if it's dead, how are you expecting the rcd to operate?

 

[MarkieSparkie]

Hi, welcome to the forum.

 

[WPD Lad]

Hold an RCD or RCBO in your hand with nothing connected, flip it to on and press test, report back

 

[Wee wire]

Sorry when I mean dead on the load side of a spur with the supply side live

 

[1amp]

if its tripping in the correct times then theres nothing to worrie about, however RCDs should trip whe you cut through the cable even if its dead because its detecting a dead short between live and neutral

 

[WPD Lad]

Sorry when I mean dead on the load side of a spur with the supply side live

The RCD needs to see an imbalance to trip, short the earth and neutral when it's live

 

[VoltzElectrical]

if you isolate a circuit using the MCB then cut through the cable, the RCD covering the circuits should (will) trip if the rcd is working.

 

[Wee wire]

Why do u think it's not then

 

[Wee wire]

I have shorted them out at spur an at db still doesn't trip

 

[Knobhead]

if its tripping in the correct times then theres nothing to worrie about, however RCDs should trip whe you cut through the cable even if its dead because its detecting a dead short between live and neutral

It's time you did some reading!

 

[drew35]

Is it the 1st of April today?

 

[sedgy34]

Hi looking a little help. Replaced a consumer unit in a house with a contactum 8way dual rcd split board. After finishing it I tested with rcd tester at 1 time and 5 times with the rcd tripping in correct times. I went to connect up boiler after with the cable dead I cut it but the rcd would not trip. Then at the db I linked out the earth bar and neutral bar and neither rcd tripped to try and see if it would anyone any ideas?

your spur for the boiler is double pole so when you cut it it didnt register through the rcd

 

[Wee wire]

Wat about when I linked out e an n bar

 

[Guitarist]

if its tripping in the correct times then theres nothing to worrie about, however RCDs should trip whe you cut through the cable even if its dead because its detecting a dead short between live and neutral

Really, please do as Tony says...

 

[alli]

If you cut the wire after a double pole fused spur the only cable connected back to the fuse board is the earth, therefore no fault will be seen by the RCD

Edit: Sorry , Sedgy34 beat me to it

 

[Richard]

What did the rest if your testing show? Were the results what you expected them to be? What was the earthing arrangment out of interest?

Rich

 

[Des 56]

Its a little disapointing to hear some silly responses in this thread

Especially since its not as if rcds and why and how they operate takes a rocket scientist to understand

 

[GLENNSPARK]

i think people get mixed up with "if the circuit is dead" and "if the RCD is dead"....if the circuit is dead..but the RCD is still energised....then it will still sense a N-E fault on the dead circuit.....but if the RCD is dead....then of course it wont sense any faults on the circuit/s it feeds.....

 

[Wee wire]

i think people get mixed up with "if the circuit is dead" and "if the RCD is dead"....if the circuit is dead..but the RCD is still energised....then it will still sense a N-E fault on the dead circuit.....but if the RCD is dead....then of course it wont sense any faults on the circuit/s it feeds.....

Is it a faulty rcd then if so why would the tester still give good tripping times