"Dave Liquorice" wrote in message
ll.net...
On Fri, 15 Aug 2008 12:47:01 +0100, wrote:
Section 1 - 80A/30mA RCD
32A - MCB - Ring - 2.5mm T&E - 30M - Downstairs Sockets
32A - MCB - Ring - 2.5mm T&E - 40M - Upstairs sockets
32A - MCB - Ring - 2.5mm T&E - 25M - Kitchen Sockets
Spare (Blanked)
Section 2 - 80A/30mA RCD
06A - MCB - Radial - 1.5mm T&E - 20m - Downstairs lighting
06A - MCB - Radial - 1.5mm T&E - 25m - Upstairs lighting
Spare (Blanked)
Would you ot be better splitting the lighting/power between the boards:
section 1
Downstairs Sockets
Upstairs lighting
Kitchen Sockets
Trouble is with that a "fault" on the downstairs ring will turn of the
lights upstairs. Plungeing anyone up there into sudden and unexpected
darkness...
Personally I'd rather the lighting was not on an RCD but it appears that
17th Ed won't allow that.
Having three rings on a single 30mA trip might start to push things these
days with so many devices having SMPUs and "leaky" supression components
across the mains. IIRC the recomendation is for no more that 10 such
devices per 30mA trip...
Okay, so I started with a three way CU, then decided 2 way, now I think I
should have a single way, with a 100A switch, and use more RCBO's!
Here is the revised plan for the house CU
Consumer Unit 1 - House
14 module, 100A switch
32A - RCBO - Ring - 2.5mm T&E - 30M - Downstairs Sockets
32A - RCBO - Ring - 2.5mm T&E - 40M - Upstairs sockets
32A - RCBO - Ring - 2.5mm T&E - 25M - Kitchen Sockets
32A - MCB - Radial - 4.0mm XPLE SWA 2core - 15m - Garage Sub main, Earth
exported via steel wire.
16A - MCB - Radial - 2.5mm T&E - 10m - Built in Oven
16A - MCB - Radial - 2.5mm T&E - 10m - Built in Microwave/Oven
16A - MCB - Radial - 2.5mm T&E - 10m - Induction Hob
16A - MCB - Radial - 2.5mm T&E - 10m - Kitchen Fridge
10A - RCBO - Radial - 1.5mm T&E - 20m - Exterior Lights
06A - RCBO - Radial - 1.5mm T&E - 20m - Downstairs lighting
06A - RCBO - Radial - 1.5mm T&E - 25m - Upstairs lighting
06A - MCB - Radial - 1.5mm T&E - 05m - Alarm System
Spare (Blanked)
Spare (Blanked)