Onoff

Wherever you want as it's an extension and not a new build or rewire pretty much.

The OSG, (On Site Guide) makes no mention of the 450 / 1200 dimensions being to the centre lines. In fact it says "between" and shows the top of the switches at 1200 and the bottom of the sockets at 450.

No, not all. Think a high level tv socket, fan isolator switch etc. Not a lot of point in saying you need a fan switch at low level for a person in a wheelchair to isolate the fan that they couldn't get to anyway.

Except Part M 1.18 is contradictory! Says to the centre line but shows the lower sockets with the bottom edge at 450mm! Just put bottom edge of sockets no lower than 450mm, top edge of switches no higher than 1200mm.

That's good. Clipped direct against timber is not considered totally surrounded!

I'm looking in the OSG, specifically Table F2. If the cable is totally surrounded by thermal insulation, for example 500mm or more then you must derate by a factor of 0.5. It assumes the insulation has a thermal conductivity greater than 0.04 Wm-1K-1. (Sorry, can't do "to the power" of on this phone). Surrounded for only 50mm of its length it's still a factor of 0.88. In layman's terms, passing through insulation creates a pinch point/hot spot for the cable.

Over what length will it pass through the "loft roll" and will it be totally surrounded by said thermal insulation? It's important as you may have to apply a derating factor.

Used one of these, a 500mm B&Q flexi. In the words of he who must be obeyed. "A bit more than hand tight is usually ample. Say 1/2 turn or so". It's easily accessible through the back of the (still unfinished ? ) cupboard:

I remember similar concerns! Thinking the "gap" between bath and wet room corner would be tight. Tbh I was more concerned you would feel off balance when crossing the very corner of the wet room corner where it's laid to falls. In reality you don't even notice it. With hindsight I'd have gone steeper on the falls. Having that OSB there and it looks like an immovable object as the wet room corner did for me. Once done you'll wonder what the fuss was about.

I chamfered the bath corner as well as sinking the bath. Also the sides rake inward. Works really well.

Do we know it's that?

Ref Method 101# in Table 4D5 applies assuming his insulation is thicker than 100mm. Then 4mm is rated at only 22A. Would need to up to a 6mm.

You could run both off of one breaker at the cu then one "big" cable and split at the heaters. Or give each it's own breaker or rcbo and "small" cable. Personally I'd separate them for complete control. What length of cable run approx and how will it be installed? Clipped direct, under insulation etc.

Depends on the club policy I guess!

Take a pic of the trannie up the pole if there is one.

Surprised my name didn't come up as in too poor to buy a Tesla! ?

460V centre tapped to earth. Phases are 180 rather than 120 deg apart. So centre tap is neutral. Like a big site tranny. The incomer is just a standard 3P one. Might make it a bit easier if you were into making phase converters for machinery! I'm working with HV boys tomorrow so will ask them over tea why this is done.

I keep my working area spotless...go figure.

Rural I bet. Not split phase is it? 460V between phases but still 230V L-N, L-E.

If you had OCD you'd get a f**king broom & Hoover out! ? Glad I didn't go white grout on the floor.

The Wolseley, black, solvent weld: 36mm OD - (1 1/4" ID) 43mm OD - (1 1/2" ID) 56mm OD - (2" ID)

I think the model S is much more a knicker dropper in terms of looks that the 3. The S to me says low slung coupe. The 3 is a bit more squat ans family compact looking. Only my opinion, don't get me wrong I'd happily have either! Maybe Tesla should think about slide in drive trains and power packs for other makes...

Tesla just need to make their cars look sexy now! ?

No offence taken, you know me! What do you mean? Everything was pretty well considered tbh and done for a reason. As @ProDave will attest to, "50mm" doesn't necessarily mean the same thing with all makes of fitting especially on eBay. Mixing solvent weld and compression can be a mare. The Geberit wall drain waste was some weird, nominally 50mm bit of mdpe then the black solvent weld a bit different size wise. The 50mm can be inside diameter or outside. Got all my waste from the local Plumb Centre: https://www.wolseley.co.uk I didn't move without @Nickfromwalessay so!

Bath waste here is 50mm solvent. I've an accessible flexi waste from the trap onto solvent waste: The bath waste is 50mm solvent weld in the slab. There's a T coming up and the basin goes into that in 32mm solvent via a reducer. Anti siphon trap on the basin so the bath emptying doesn't make ths basin trap gurgle. Shower / wall drain waste goes from the mdpe waste on the Geberit wall drain to 50mm solvent via a compression coupler. Deep shit if that ever leaks!