We're having SPEN bring 18KVa 80A supply under the lane into the hedge on our site for domestic usage. We are having to provide a cabinet for SPEN to house their meter board nestled into the hedge. From this meter board we will then get our sparky (yet to be commissioned) to run a cable underground to serve a consumer unit indoors.
My question is; What will be (roughly) the physical size of the isolator switch that will be required to also be within the meter cabinet?
Presumably we will need something akin to one of these? Isolators Switch Fuses - QVS Electrical Supplies | Electrical Wholesaler
Obviously we will later be employing a sparky for all the works beyond the meter, but all I need for the moment is the physical size of the right type of switch as per the link. From this information we can then build the cabinet big enough to not only house SPEN's gear and the meter, but also our isolating switch.