Thanks that is really helpful. I think this is a dual heating element. Industrial switch eh, doesn’t surprise me with this house. The thought of cranking that to on terrifies me.
Got an electrician coming to do the fuse box soonish so will arrange for an upgrade to my immersion wiring.
Many...
B5E0CAEB-54A2-476E-9132-3C20D9E11152 by DamianB posted 20 Jun 2018 at 7:34 AM I have a switch in my kitchen above which is live and I suspect used to power the immersion and maybe a fan. This looks as if it feeds another switch in my airing cupboard which looks ancient...