J
jumpin jax
For domestic i think a real time saver is to get a R2 lead, this also allows quick cpc testing at every point. Just make sure there are no painters or plasterers on site or the lead won't last too long!
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Discuss what tests are you doing on consumer unit change. in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net
Well, RCD's are installed nowadays so no need to do insulation resistance test, cos yer RCD won't set if there's a problem. Then a couple of Zs tests here and there to make sure you've got an earth.
The rest of the testing is carried out at home. :behead:
This is the ESC advise
10.2. In addition, as a minimum, the following testsshould be carried out to the existing circuits
connected to the replacement consumer unit.
• A continuity test of the protective conductor of
each circuit, to the point or accessory electrically
furthest from the consumer unit and to each
accessible exposed-conductive-part.
• A continuity test of all ring final circuit
conductors.
Note
R1+R2 values are not mentioned
Here is a link if you want to refer to their bumph
http://www.esc.org.uk/fileadmin/user_upload/documents/industry/best_practice/BPG6_09.pdf
You should always be conducting tests ''Prior'' to any CU change!!
Errr, ... there are normally no RCD's in the CU ''Before'' changing the CU, ....But there is AFTER!! ...IR testing is essential, Pre a CU change. You may not be able to get either RCD to hold in after your CU change if the insulation levels are too low!!!
Even after a CU change, and even if the RCDs are holding in, IR testing should be carried out as a matter of course, it's a record against which any future EICR can be compared. Which in essence, is one of the fundamental reasons of EICR's in the first place, ...monitoring any deterioration of the installation!!....
Sorry, I thought that by putting the little picture on the end, you would realise it was ment as a joke.
Naturally R1&R2 or R2 would be required for the first test mentioned.
You should always be conducting tests ''Prior'' to any CU change!!
Errr, ... there are normally no RCD's in the CU ''Before'' changing the CU, ....But there is AFTER!! ...IR testing is essential, Pre a CU change. You may not be able to get either RCD to hold in after your CU change if the insulation levels are too low!!!
Even after a CU change, and even if the RCDs are holding in, IR testing should be carried out as a matter of course, it's a record against which any future EICR can be compared. Which in essence, is one of the fundamental reasons of EICR's in the first place, ...monitoring any deterioration of the installation!!....
The 'real world' problem with tests prior to a CU change is more often than not you are asked to quote for the job. So you go round and carry out a full set of tests which takes time...and then dont get the job....sod that.
When we quote for a CU change a visual inspection is usually sufficient to get a feel for the likelyhood of any issues,and our quote clearly states that any problems encountered during the CU change may incur extra cost. Testing and inspection is then carried out at the time of the change. I am an experienced fault finder and cant recall any issue which added more than a couple of hours to a job. I've done hundreds of cu changes and there have never been any customer problems with this approach.
This might not be a text book approach,but there are no ideal solutions here....a text book approach is liable to result in me carrying out a pir for nothing....and I aint doing that.
Those who cant trace faults may prefer not to adopt this way of doing things.
Personally I don't do a Zs measurement on radial circuits if I can help it. I use Ze+(R1+R2). Particularly on lighting circuits I don't like removing roses etc to get to the earth when the cct is live.
Who was the elecsa chap? I have David Turpin turning up tomorrow to do my assessment.
Reply to what tests are you doing on consumer unit change. in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net