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Just me? I'm saying I don't know how it will behave and those calculations are meaningless.

I'd be more likely to assume it's given for 230V, that's the european standard. Either way, induction hobs are far from a purely resistive load (it's in the name) so you can't assume the current drops with the voltage.

Yes, selv and pelv are another method of meeting the requirements without running within safe zones and providing RCD protection/earthed metallic containment. I'd rather not, which is why I've asked about the direction of the cable runs and floor construction. However, if the cables are going...

trv

Because they're low voltage and don't pose risk of electric shock. Is that a newly plastered wall? Is this ground floor or upstairs, and are you certain about the existing wiring going up from the sockets? What is your floor contruction?

Definitely a good idea, you want to give it the best chance of getting outside before it condenses, otherwise it'll just sit in the duct until it freezes/evaporates again

I don't know but on a related tangent, I think efficiency drivers also contribute to the lack of robustness in a lot of things, not necessarily just the fact it's cheap materials or poorly made. Pumps for instance pack more of a punch in a smaller format than they used to, but even with full...

I'm with you, its a piece of history probably hand wound by somebody's grandad! Nice to think it's still buzzing along nicely all these years later.

The fuse carrier might say 100A, but without removing it you can't be certain what the actual fuse size is - it's common practice for smaller fuses to be fitted. You may be able to find this out from the DNO, if they don't know then most electricians wouldn't have qualms about checking it. Looks...

@ericmark I know what you're saying, I don't think that's the case though. The design load of the entire installation can be taken into consideration rather than speculating that every single circuit is simultaneously being used to the brink of overload - otherwise the right hand RCD would be...

I would say you shouldn't have any AAVs fitted to an open vented system full stop. In an unvented system it wouldn't matter if it was on the return.

Are you saying diversity isn't taken into account for that? If so that's news to me, and I wouldn't be surprised if other electricians have fallen foul of it (I would like some proof though).

The RCD type units supplied in most (all?) EV chargers aren't compliant with the british standards because they're not a mechanical switch with a test button. So basically, you do have to have a RCBO but there's no reason you couldn't have one fitted to that CU (I'm not sure whether lewden make...

As you alluded to in your previous post the chance of a PEN fault is pretty remote - the reason it's mandated for car chargers is that in the event of a fault the chance of coming into contact with energised metalwork is extremely high, this isn't necessarily the case for a lot of portable tools...

Can't see it saving you any money at all, you can pick up one of the Screwfix tethered chargers for £350, and that's only a single unit to install. I don't see a massive issue with your idea, technically chargers are supposed to be supplied with a "dedicated" circuit but you could argue it would...

You can get them for about a quid in Screwfix, but yes.

The fused spur is already there, I'm just proposing you change the back of it for a slightly deeper one

You'd be better off replacing your programmer rather than your thermostat for a dual channel receiver. Then you can control the hot water and heating through the wireless thermostat.

Lol you're dreaming, once it's in it'll be staying like that till the end of time! If using pvc conduit you use these and swap the bush for a m20 stuffing gland. Cut a short nipple of conduit to join. Or you can use a junction box if you prefer.

A couple suggestions/questions. Does your ring circuit currently have RCD protection? If not, you'll need to fit a RCD socket for outside. Does the light need to be switched? A lot of outside lights have PIR (motion) sensors and dusk to dawn settings. If you're running the cable externally...