I've heard it said (possibly on here) that when wiring singles the CPC conductor must have the same size as the line conductor, but I'm struggling to find evidence that backs this up. If 2.5mm T&E can have a
1.5mm CPC, why would the situation be different for singles?The closest the regs come to agreeing is 543.1.4 and table 54.7, but surely I'm allowed to use the adiabatic equation (543.1.3) to arrive at a possible smaller CPC size, or not?
Alex