Work is about to start on hard landscaping in my garden and there is a gazebo and shed planned for one corner.
My plan is to update my current fuseboard (RCD and wired fuses) to an MCB type (with RCD) and add a circuit (or two) for the garden.
There is a 25 metre run from the current consumer unit to the new shed position and I would like to run an SWA cable under the new patio and path position to avoid the chance of a spade hitting it.
From the new shed position, I planned a small CU to feed a couple of indoor sockets (fridge freezer/power tools), an outdoor socket (strimmer etc), a pond pump, some (low voltage type) lights and a quartz heater.
The gazebo will be tall enough to mount a 1-2kw quartz heater in the centre of the roof leaving enough clearance. The heater will be controlled by a suitable "dimmer".
I would appreciate some advice from the group:
- What gauge SWA should I use assuming a 16A supply over that length? 2.5 or 4mm?
- Should I use an extra cored cable to supply the heater separately?
- Should I supply the power from the house on the non trip side of the CU and provide the RCD function in the shed CU?
- Should I use the house supply earth via the SWA shield or install a separate rod at the shed location?
Thanks for your help,
Colin M