Hope to get some advice here please. We've had some work done on the house today and a gas fitter has managed to drill through the electrical ring main. He's effected a repair as shown:
Two concerns: (1). He's used a stranded cable, not sure of the size but it doesn't look like 2.5mm^2. Can you mix stranded and solid cable? It's not a big worry as I have plenty of spare T+E so I think I'll change it for peace of mind. (2). The connector blocks are rated at 16A 400V, our ring main is 30A 240V, do these connectors need to be changed as well?
Thanks in advance!