Discuss Faulty rcd? in the Electrical Forum area at ElectriciansForums.net

M

Marbles

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:  American Electrical Advice Forum

Domestic installation, rcd tripped on supply to garage which then feeds a barn 25 metres away via swa. supply cable to garage is swa and tests out fine on insul res and continuity as does swa to barn. connect any load to con unit in barn even with no earth and rcd trips? Circuits in barn show healthy insul res readings? any ideas chaps?
 
M

Marbles

ran out of time today will try tomorrow, seems strange that with good insul res readings the rcd trips even with a pendant connected across supply?
 
S

StuSpiers

Well an rcd test will take the guess work out.

did you carry out all IR tests?

L - N, L - E, N - E

Is pme exported?
or is it on a seperate spike?
 

Taylortwocities

-
Esteemed
Arms
Reaction score
2,796
Is this a brand new installation, or an existing one that has mysteriously started to have this problem.

If it's new, it sounds like a neutral in the wrong busbar, or neutral link not taken out between busbars in an RCD consumer unit.
 
M

Marbles

its an existing installation with a new 17th edition twin rcd board bin added, yes insul res tests done between all conductors?
 
A

adamh

as others have said do a ramp test on the rcd. If all is well try disconnecting each circuit individually and then loading the installation to rule out the possibility of parallel paths.
 
D

Deleted member 9648

its an existing installation with a new 17th edition twin rcd board bin added, yes insul res tests done between all conductors?

Are you saying you've replaced the CU to an existing install?....if so you've got a N in the wrong bar.
 

Taylortwocities

-
Esteemed
Arms
Reaction score
2,796
yeah test button is functioning

That is NOT how you test an RCD.

The test button is a very basic functional test.

From the sound of it "someone" has done a board swop and mixed up the neutrals.
That "someone" also has not done the required tests on the existing and the altered installation.
 

Reply to Faulty rcd? in the Electrical Forum area at ElectriciansForums.net

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
Top