- Dec 18, 2011
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- If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
- United Kingdom
- What type of forum member are you?
- Practising Electrician (Qualified - Domestic or Commercial etc)
Here is a thread I started recently which you might find useful http://www.electriciansforums.co.uk...ectrical-forum/83094-cu-change-checklist.html also pop in 'cu changes and you' into the search bar and a thread by Jason will come up which is very useful.
I would always do at least a global N-E IR check on the pre-work visit as it will show up any possible faults which will trip your sparkly new RCD's, you can then warn the customer before hand and avoid any embarrasment. I didn't do this on my very first CU change (not that long ago) and there was a fault and panic set in!!!
You dont have to spend 2 hours testing for free before hand but I would certainly do everything on the above check list (perhaps 1/2 hour in total) .
As the others have said 7Mohms is well within the regulations.
I would always do at least a global N-E IR check on the pre-work visit as it will show up any possible faults which will trip your sparkly new RCD's, you can then warn the customer before hand and avoid any embarrasment. I didn't do this on my very first CU change (not that long ago) and there was a fault and panic set in!!!
You dont have to spend 2 hours testing for free before hand but I would certainly do everything on the above check list (perhaps 1/2 hour in total) .
As the others have said 7Mohms is well within the regulations.
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