Two way lighting Fault

[cm304eex]

Hi all I have just installed two way lighting but when i switch on the power the mcb trips trips straight away. i have carried out insulation resistance test and they all came back fine r1 r2 all fine the fault is only on the strapper. any ideasbad day explode

 

[Manator]

Lighting - Downloads - Talk.electricianforum.co.uk... a forum with a difference.

Check the diagrams to see if you have wired the two way correctly.

 

[Ali]

Did you do the IR test with the switches in both 'on' positions?

Have you checked the obvious - are the neutrals on the right RCD?

No doubt someone else will be along soon to offer loads of good advice.

 

[Andy™]

if IR tests come back fine and MCB trips, then you have not tested IR correctly. you did operate the switches, didnt you?

 

[cm304eex]

Hi all yes I did operate switches I even disconnected strappers and tested them individually.

 

[Andy™]

the fault is only on the strapper. any ideasbad day explode

how do you know this?

as for 'any ideas?' how about replace the cable?

 

[Doc Hudson]

Do you mean the MCB or RCD is tripping? If it is the MCB you have wired directly across live & neutral with your switch arrangement. Did you do IR tests between L & N or just (L+N) to E. Could be you have the ends of your two-way switching on the wrong terminals at the ceiling rose, (if there is one).

Doc H.

 

[cm304eex]

HI all found the fault I had wired the switch incorectly:yellow card

My boss was not very happy with me as I swore blind I had got it right.

 

[Andy™]

IR should have found it. how did you wire it?