A couple of questions for you.
The electrician that rewired our house ran a 10mm2 SWA to our outbuilding. The total length of the cable is about 45m. It is in ducting underground at a depth of approximately 1.2m.
Now, my understanding is that the max load for 10mm2 underground over 45m would be about 8.8kW.
So, for my questions...
When installing a consumer unit in the outbuilding:
Would I treat the incoming SWA cable to the outbuilding as if this were the main supply in any other home?
I only ask as the main cable from the DNO looks thinner than a 10mm2 SWA. Though the tails are 25mm2
When installing a consumer unit do I have to consider the maximum load of 8.8kW from the outbuilding consumer unit to my house or can I focus on the cable selection and demand on what is effectively the ‘consumer’ side of the consumer unit?
My proposed setup for the outbuilding would be:
6A RCBO - Outside Lighting - 56W
6A RCBO - Downstairs Lighting - 98W
6A RCBO - Upstairs Lighting - 112W
6A RCBO - Smoke Detectors - 20W
16A RCBO - Electric Radiators - 3.4kW
16A RCBO - Outside Sockets - <1.8kW
32A RCBO - Downstairs Sockets - <2.4kW
32A RCBO - Upstairs Sockets - <500W
32A RCBO - Kitchen Appliances - 5.3kW
45A RCBO - Water Heater - 10.0kW
The electrician that rewired our house ran a 10mm2 SWA to our outbuilding. The total length of the cable is about 45m. It is in ducting underground at a depth of approximately 1.2m.
Now, my understanding is that the max load for 10mm2 underground over 45m would be about 8.8kW.
So, for my questions...
When installing a consumer unit in the outbuilding:
Would I treat the incoming SWA cable to the outbuilding as if this were the main supply in any other home?
I only ask as the main cable from the DNO looks thinner than a 10mm2 SWA. Though the tails are 25mm2
When installing a consumer unit do I have to consider the maximum load of 8.8kW from the outbuilding consumer unit to my house or can I focus on the cable selection and demand on what is effectively the ‘consumer’ side of the consumer unit?
My proposed setup for the outbuilding would be:
6A RCBO - Outside Lighting - 56W
6A RCBO - Downstairs Lighting - 98W
6A RCBO - Upstairs Lighting - 112W
6A RCBO - Smoke Detectors - 20W
16A RCBO - Electric Radiators - 3.4kW
16A RCBO - Outside Sockets - <1.8kW
32A RCBO - Downstairs Sockets - <2.4kW
32A RCBO - Upstairs Sockets - <500W
32A RCBO - Kitchen Appliances - 5.3kW
45A RCBO - Water Heater - 10.0kW