That’s great advice and means I can plan for a complete revamp. To address the RCD issue will mean a replacement CU regardless (only 6 slots). So, I may as well bring the main board up to date at the same time, and add in the EV. In the meantime, I really need to establish if an intentional or misguided error was made with the RCD choice.
What is the relationship between:
Amendment 2 BS 7671:2018 IET Wiring Regulations (BS 7671:2018+A2:2022)
BS EN IEC 60335-2-40:2024+A11:2024
My heat pump manufacturer appears to be hiding behind the HPA March Guidance. Prior to that, they say it was up to the Electrician to fit the correct type based on BS 7671 (hinting they did not offer guidance)
Does one trump the other, or is it more complex than that?