Shed consumer unit

[dward49]

Hi guys and girls,

I'm newly qualified and want to confirm my method is sound before I commence any work. I'm registered with my CPS so can notify new circuits in domestic.

I have a new customer that has asked for lighting and power to the garden shed (wood construction). The existing installation is an economy 7 setup, with 2 consumer units. The 24hr CU is a MK Sentry (Plastic) Dual RCD split board with no free ways. Supply is TN-C-S PME, no supplier isolator fitted. Bonding in place. E7 night rate CU is earthed via 24hr CU, 24hr CU to cutout.

The shed is approximately 12m from the house. The ground between the house and the shed is concrete, with no damage to be made to it.

The plan in brief:

• Isolate DNO supply by pulling fuse - (my DNO permits this with scheme membership).
• Replace existing henley block for 5 way DP to enable additional feed
• Install MET & connect to cutout. From MET to both existing CU's and confirm readings.
• Install Fused Switch (Lewden FS) via Henley
• Fused Switch to 6mm T&E, through wall to Wiska adaptable box.
• Wiska adaptable box to 6mm 3 Core SWA.
• SWA will run via a catenary wire to shed, then clipped direct and brought into shed. At this point, I'll either use another adaptable box and move back to 6mm T&E or bring the SWA into shed and into lewden consumer unit.
• Shed CU (63A RCCB, 16A MCB, 6A MCB) will provide lighting radial and power radial, installed within flexicon and metal sockets.

The shed/workshop is used quite a bit, but with no extreme power requirements. Sewing machine, lighting, electric heater.

I've attached a few photos and a sketch to give an idea - apologies, I'm no artist!

D.

 

[Midwest]

Why would anyone mention TT?

I know, whats motorcycle racing go to do with it!