Quick answer, I would have thought it matters not unless the terminals identified as such. A long time ago I asked the DNO lads why they wlould not allow for a 4 pole isolator to feed an off peak and normal supplies and there answer was their supervisor had nitpicked because one of the terminals was marked "N" so you could not then have two Ns and two Ls and also for same reason the N must be the incommer N and the outgoer N was unmarked.
Quick answer, I would have thought it matters not unless the terminals identified as such. A long time ago I asked the DNO lads why they wlould not allow for a 4 pole isolator to feed an off peak and normal supplies and there answer was their supervisor had nitpicked because one of the terminals was marked "N" so you could not then have two Ns and two Ls and also for same reason the N must be the incommer N and the outgoer N was unmarked.
