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Topic Title: Inspection & Testing
Topic Summary: Certification of electrical work
Created On: 18 September 2013 09:38 AM
Status: Read Only
Linear : Threading : Single : Branch
 Inspection & Testing   - mazzy2000 - 18 September 2013 09:38 AM  
 Inspection & Testing   - AJJewsbury - 18 September 2013 09:56 AM  
 Inspection & Testing   - John Peckham - 18 September 2013 09:58 AM  
 Inspection & Testing   - OMS - 18 September 2013 10:10 AM  
 Inspection & Testing   - daveparry1 - 18 September 2013 11:30 AM  
 Inspection & Testing   - MrP - 18 September 2013 12:11 PM  
 Inspection & Testing   - alanblaby - 18 September 2013 03:31 PM  
 Inspection & Testing   - rocknroll - 18 September 2013 03:51 PM  
 Inspection & Testing   - Parsley - 18 September 2013 04:25 PM  
 Inspection & Testing   - leckie - 18 September 2013 04:26 PM  
 Inspection & Testing   - OMS - 18 September 2013 05:34 PM  
 Inspection & Testing   - Zs - 18 September 2013 09:58 PM  
 Inspection & Testing   - Legh - 18 September 2013 10:50 PM  
 Inspection & Testing   - AJJewsbury - 18 September 2013 04:19 PM  
 Inspection & Testing   - AJJewsbury - 18 September 2013 10:19 PM  
 Inspection & Testing   - John Peckham - 18 September 2013 10:29 PM  
 Inspection & Testing   - normcall - 19 September 2013 06:33 AM  
 Inspection & Testing   - davezawadi - 19 September 2013 07:07 AM  
 Inspection & Testing   - leckie - 19 September 2013 07:32 AM  
 Inspection & Testing   - dickllewellyn - 19 September 2013 07:53 AM  
 Inspection & Testing   - OMS - 19 September 2013 03:15 PM  
 Inspection & Testing   - leckie - 19 September 2013 05:22 PM  
 Inspection & Testing   - iie62478 - 19 September 2013 05:42 PM  
 Inspection & Testing   - OMS - 19 September 2013 06:11 PM  
 Inspection & Testing   - kj scott - 19 September 2013 06:33 PM  
 Inspection & Testing   - OMS - 19 September 2013 06:42 PM  
 Inspection & Testing   - kj scott - 19 September 2013 06:53 PM  
 Inspection & Testing   - OMS - 19 September 2013 07:40 PM  
 Inspection & Testing   - leckie - 19 September 2013 09:33 PM  
 Inspection & Testing   - OMS - 20 September 2013 10:15 AM  
 Inspection & Testing   - Parsley - 20 September 2013 10:54 AM  
 Inspection & Testing   - OMS - 20 September 2013 11:57 AM  
 Inspection & Testing   - Parsley - 20 September 2013 02:33 PM  
 Inspection & Testing   - leckie - 20 September 2013 03:31 PM  
 Inspection & Testing   - OMS - 20 September 2013 04:18 PM  
 Inspection & Testing   - sparkingchip - 20 September 2013 07:39 PM  
 Inspection & Testing   - kj scott - 20 September 2013 07:59 PM  
 Inspection & Testing   - Legh - 20 September 2013 01:36 PM  
 Inspection & Testing   - kj scott - 19 September 2013 08:08 AM  
 Inspection & Testing   - mazzy2000 - 19 September 2013 08:27 PM  
 Inspection & Testing   - dickllewellyn - 19 September 2013 09:31 PM  
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 18 September 2013 09:38 AM
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mazzy2000

Posts: 35
Joined: 25 June 2013

I know this topic has been discussed previously, but I am trying to gauge opinion a bit further.

My team of electricians recently carried out a distribution board replacement feeding circuits at a small railway station and in their opinion, it does not require an electrical installation certificate. My interpretation of the regulations is that this work should have been certified in accordance with 610.6 as it is an alteration in accordance with 610.4.

There are two types of certificate, but the notes on the minor works cert preclude it from being used for DB changes; therefore, an electrical installation certificate must be issued together with a full schedule of inspections and tests. This would include relevant tests/inspections on all the final circuits, even though they have only been disturbed at the distribution board.

Their argument is that there is already a valid periodic report for the board and that the board is being changed from a 30 year old Ottermill quicklag style to a modern Schneider board with type B/C circuit breakers; therefore, it is safer.

Another agrument for issuing the certificate would be for recording the differences between the two installations, even though they have likely been improved e.g. main switch characteristics, different circuit breaker characteristics (5A to 6A, 30A to 32A etc.). Also, this cert is signed off to indicate that the new installation has been designed, constructed and inspected/tested in accordance with 7671.

As a compromise, they have agreed to carry out protective conductor continuity and earth fault loop impedance tests as a minimum in accordance with 1.4 of guidance note 3. It is reasonable to assume that conductor details and insulation resistance etc. are unchanged as the circuits have not been altered. These would be re-evaluated at the next periodic inspection/test for the entire installation (which would stay at the same schedule as it was before the board was changed e.g. last done in 2011, net due in 2016 even though one of the DBs was changed and tested/inspected in 2013.

Is this considered a reasonable approach to DB replacements?
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