I asked the builders to install a separate continuous 40amp RCBO to the garage and data cable. They did neither
They fitted a 10mm cable jointing it outside with Wagos in a small 4" box. Used 6mm Wago and trimmed the 10mm cable to fit into the Wagos
. We opened the joint box checking for earth connections when we moved the connectors they just fell off the wires. We upgraded to a much larger box with 10mm connectors.
I need to feed the CT input back from the meter or internal consumer unit to the Zappi. Main fuse is 80amp which potentially could blow if he had the car charging, having a shower(electric) tumble drier going and making a cup of tea
The Zappi will throttle down charging from the current drawn by the house reading the CT information. It easier to dig a trench around the house to the garage whilst soil is still soft, lay a conduit and feed small cat5/6 cable through it.