UK Please help

[KadirUK]

Hi,

I would genuinely appreciate some guidance. I am currently completing training for my City & Guilds 2391-52 practical, and as there is some time before I take the test, so I wanted to get some on hands training done at home, in safe manner. I've decided to make my own single phase training board, like the one I've used at the training centre. I am now stuck as I've hit a knowledge barrier and can't find the appropriate solution. Please see images and questions below.

This is my training board

This is how I plan on powering the training board, with a 13a fused cable

My problems start here, I plan on using a 2.5mm cable to connect to this, is this ok?

Assuming a 2.5mm cable is ok for the front side, at the rear I have another problem, as I have 16mm supply cables feeding the consumer unit. I need to step these down in size to fit the 2.5mm cables from the front. What is the correct procedure for doing this and what do I need to buy to fit and proceed?

I will also run a 2.5mm earth cable from the socket on the front side to the consumer earth bar and also run another 10mm earthing cable from the consumer unit earth bar to the main protective bonding on the training board. Is this ok?

I know there are a lot of questions here and please understand that I am in training and it's hard to get tutors to help you when you're not in the training centre. I would really appreciate guidance with this. I hope I'm on the right path with what I'm doing, and if not I am happy to learn.

Thanks

 

[nicebutdim]

Can you post a photo of the new wiring layout of the consumer unit. In your original pic, you have two neutral cables in the top of the left hand RCD.
You should never have two, the place to join the neutrals is in the appropriate neutral bus bar.
MK usually provide a layout fish ram for you to follow.

I'd wondered about those neutral cables, but wasn't sure what was right or wrong. A Google image search showed several MK Sentry dual RCD boards set up exactly the same, so I'm guessing the neutrals are probably welded(?) together.

 

[Taylortwocities]

Ah, could be. I haven’t touched an MK board for 10 years.

 

[pc1966]

If you add a "fake earth" terminal to the supply neutral of your test rig, rather like a PME earth coming off the DNO cut-out neutral, then you can use that only for your MFT's earth when doing RCD testing. That way you can trip the RCDs in your example CU without tripping the RCD plug supplying the system.

 

[telectrix]

Ah, could be. I haven’t touched an MK board for 10 years.

same with the 2 L's. that's how they are made. 2 cables in each ferrule. BG are similar i think.

 

[KadirUK]

“And then there was light “ thanks mate!!!
View attachment 65251

Thank you