- Reaction score
- 3,010
I highlighted the condition of an installation several months ago to a client.
In short there is a basement which is very wet and the board holding the cut outs and switch fuses is rotten, and now starting to collapse.There are a TP mains cut out, SP mains cut out, isolators for both and switch fuses for both which along with a 10 way CU for the cellar circuits.
The board needs replacing which will require the DNO out.
The basement requires sealing and drying first, very much not being done by us.
Not only is the area wet it is also very humid with condensed water on all surfaces and as a result I refuse to touch anything until dry and safely isolated.
My proposed sequence is as follows:-
1, Contract out the sealing and drying of the of the area and to improve ventilation to deal with humidity.
2, Fit new board to house all DNO equipment.
3, Contact DNO and have them move the cutouts and meters, along with new isolators, onto the new board.
The installation will now be isolated from mains.
4, Dismount all remaining switch gear and fit new board.
5, Inspect all remaining switch gear and replace all that requires replacement.
6, Fit new CU for cellar circuits, fully 18th edition compliant. My intention is to go fully RCBO with surge protection and AFDD as this is a listed building.
7, Dead test the distribution circuits and all circuits in the new CU.
8, Energise.
9, Live test the distribution circuits and all circuits in the new CU.
10, Return to service.
Questions
1, Does the sequence seem reasonable.
2, Are the DNO going to play ball?
3,Why am I wearing my partners knickers?
4, As I've only altered the protective devices of the distribution circuits I only need to ensure these are 18th Edition compliant? (The Cellar CU will be given the works along with all associated circuits.)
5, Any useful ideas and pointers very much appreciated.
Oh, I've been working for 36 of the last 48 hours so if this seems garbage please cut me some slack.
In short there is a basement which is very wet and the board holding the cut outs and switch fuses is rotten, and now starting to collapse.There are a TP mains cut out, SP mains cut out, isolators for both and switch fuses for both which along with a 10 way CU for the cellar circuits.
The board needs replacing which will require the DNO out.
The basement requires sealing and drying first, very much not being done by us.
Not only is the area wet it is also very humid with condensed water on all surfaces and as a result I refuse to touch anything until dry and safely isolated.
My proposed sequence is as follows:-
1, Contract out the sealing and drying of the of the area and to improve ventilation to deal with humidity.
2, Fit new board to house all DNO equipment.
3, Contact DNO and have them move the cutouts and meters, along with new isolators, onto the new board.
The installation will now be isolated from mains.
4, Dismount all remaining switch gear and fit new board.
5, Inspect all remaining switch gear and replace all that requires replacement.
6, Fit new CU for cellar circuits, fully 18th edition compliant. My intention is to go fully RCBO with surge protection and AFDD as this is a listed building.
7, Dead test the distribution circuits and all circuits in the new CU.
8, Energise.
9, Live test the distribution circuits and all circuits in the new CU.
10, Return to service.
Questions
1, Does the sequence seem reasonable.
2, Are the DNO going to play ball?
3,Why am I wearing my partners knickers?
4, As I've only altered the protective devices of the distribution circuits I only need to ensure these are 18th Edition compliant? (The Cellar CU will be given the works along with all associated circuits.)
5, Any useful ideas and pointers very much appreciated.
Oh, I've been working for 36 of the last 48 hours so if this seems garbage please cut me some slack.