mortgage retention advice for current installation upgrade

[walkthenrun]

Hi guys,
i need to carry some work out to get my house to pass its mortgage retention, i had a mate from napit come round and do a electrical installation inspection condition report, as one of the retention on my mortgage is due to the old electrical installation. at the moment there is a 15 way merlin gerin consumer unit. I have identified all the circuit apart from one 15A breaker. anyway i was hoping to change the current unit to rcbo's i think this is probably the best thing at the moment considering the size of the house so if anything does go rong i can localise the problem more easily. guys i have come for advice as i dont know which unit to buy? am i doing the right thing by going for rcbo's. i need something that will allow me have at least 13 different circuits. the only thing i have found upto now is a Wylex 11 way Consumer Unit Type NH1104 that i could put 11 circuits on. The immediate advice my friend give me was to condition report was to update the consumer unit so that the shower is rcd protected, the lights in the bathroom are ip65. the supply to the summer house and the pond shed is in swa cable. is it possible to just take the current consumer unit and swap it directly for an 11 way rcbo consumer unit. would everything carry on working as it is working perfectly now.
i have identified each circuit as follows
1. annexe consumer unit and outdoor floodlight consumer unit (60A) (10mm cable and 2.5mm)
2. cooker (50A) (6mm)
3. upstairs sockets (32A) with two fuse spurs in garage from ring final in above main bedroom (2.5mm)
4. downstairs sockets (32A) (2.5mm)
5. 15A?
6. 5A lights in boiler room (G), garage(G), utility(G),main bathroom(U), small blue room(U), hallway(U), pink room(U) and kids room(U) G-ground U-upstairs (1.5)
7. shower (50A) (6mm 8.5kw shower clipped direct to wall)
8. main bedroom (U) and ensuite lights (U) (5A) (1.5mm)
9. kitchen(G) dining room(G) sitting room (G) and toy room lights (G) (5A) (1.5mm)
10. boiler (5A) (1mm)
11. Pond shed hager consumer unit (60A) (10mm)
12. summer house volex consumer unit (60A) (10mm)

some pictures are included thanks
main consumer unit

main c.u and outdoor lighting c.u

pond c.u

summer house c.u

annexe c.u

thanks in advance for your immediate advice if any more pictures are required please let me know thanks

 

[Engineer54]

These MG breakers are mostly type 2 using the older ratings, the shower breaker is a newer type B unit, and is a 50A unit!!
So yes they are 60A breakers rather than 63A. MG did make 32A as well as 30A type 2 breakers for a good while too, just to confuse things further!! lol!!

 

[walkthenrun]

First off, what does this mortgage retention mean by ''old electrical installation'' From what i can see, i can't see a problem with the type of wiring. What did your friend come back with as far as the condition report, ...was there any code 1's or 2's highlighted?? If there isn't, i can't see how the mortgage company can maintain that retention order!!

i believe they were my words "old electrical installation" not the mortgage companies, the installation address was a remortgage and unfortunately the last owners spent nothing at all on upkeep, so the mortgage report said that electric, gas, defective rendering, pointing etc would all need to be fixed before they would release the 10,000 they are charging us interest on that they will not pay till the work is complete. so the new boiler has been installed, the defective render has been cut and beaded, needs rendering, and now i am trying to do the electrical installation as i have complete level 2 and am currently studying level 3 and working as a mate. i believe they just want a certificate to show the installation is safe, i dont think anyone will give me a certificate till the board has been updated till it has at least rcd, but then im thinking if im going to all that cost anyway why not spend the extra hundred quid and fit rcbos instead.

 

[walkthenrun]

Whoever installed the MG CU's didn't scrimp on costs, and will still probably be better than anything in the present Domestic market CU's ranges... lol!!

this is my worry am i taking something good out to replace it with a wylex board ;-( hmmm

 

[walkthenrun]

Hi. If you took the Amp ratings from MCB’s, I would be well interested to know in circuits 1, 2, 7, 11 and 12, what size of cable they protecting especially for shower 60A, it has to be a hell of a shower and a hell of a cable…..and then cooker 50A, that would be a very powerfull cooker???

Al

bear with me im going to remove the cover and post a picture of cable sizes

 

[Spoon]

These MG breakers are mostly type 2 using the older ratings, the shower breaker is a newer type B unit, and is a 50A unit!!
So yes they are 60A breakers rather than 63A. MG did make 32A as well as 30A type 2 breakers for a good while too, just to confuse things further!! lol!!

We use Merlin Gerin Type C60HB's and in the catalogue I have it goes from 50A to 63A

 

[Engineer54]

Nope, the current BS7671 requirements are not retrospective to a previous complying installation . So all you need is a current cert confirming that the installation is suitable for continued service. eg, No code 1's or 2's!!

 

[Engineer54]

We use Merlin Gerin Type C60HB's and in the catalogue I have it goes from 50A to 63A

Ah, but that's today's ratings, these are ''Type 2'' breakers rated at the then standard 60A. Were not talking about the newer type B breaker that has been installed for the shower...

 

[walkthenrun]

Hi. If you took the Amp ratings from MCB’s, I would be well interested to know in circuits 1, 2, 7, 11 and 12, what size of cable they protecting especially for shower 60A, it has to be a hell of a shower and a hell of a cable…..and then cooker 50A, that would be a very powerfull cooker???

Al

if the shower no 7 is 6mm no2 looks to be 6mm too and that leads me to believe breakers 1+11+12 are all 10mm

 

[DPG]

What's the second cable going in to that 1st breaker? Daz

 

[walkthenrun]

We use Merlin Gerin Type C60HB's and in the catalogue I have it goes from 50A to 63A

is it possible to change the shower breaker i have at the moment to an rcbo in the same consumer unit (praying it is possible)

 

[walkthenrun]

What's the second cable going in to that 1st breaker? Daz

it is a feed for the small consumer unit to the right of the main c.u, which is responsible for the ring, that feeds the outside floodlights

 

[DPG]

What's the second cable going in to that 1st breaker? Daz

Ah, I've just re-read the OP, it's a security light fed from the 60A breaker! Daz

 

[Spoon]

Ah, but that's today's ratings, these are ''Type 2'' breakers rated at the then standard 60A. Were not talking about the newer type B breaker that has been installed for the shower...

I think im getting confued here.
They may have done 60A in the past but the shower MCB is a 50A type B, hence the B50 under the type C60HB.

 

[walkthenrun]

Nope, the current BS7671 requirements are not retrospective to a previous complying installation . So all you need is a current cert confirming that the installation is suitable for continued service. eg, No code 1's or 2's!!

could you give me an example of a code 1 or code 2 would that be something like does not conform to IP2X where there is risk of fatality

 

[Spoon]

is it possible to change the shower breaker i have at the moment to an rcbo in the same consumer unit (praying it is possible)

You shouldnt have to. As per Eng54 post 21.