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waste of time/money/effort/copper to put another cable in

It’s been mentioned before on here. Don’t know what advantage is of taking 2 3+e to the rose?

Which is just a dot on my phone?

What good point did I miss

Being sensible, I would put a 2 way metal CU into the garage. Metal one to future proof. Put it near the ev charger or where cables enter the garage. It must have an RCD. 6A mcb for lights 16 or 20A for sockets. Should you want to use the ev charger in the future you can talk to a spark. But...

The cpc looks so shiny to be so old the insulation has faded

If neutrals were looped at the switches, wouldn’t that avoid having to get up a ladder? (Except maybe, the room with the fault ?)

Modern ways Seam to only like one cable per mcb (except rings). If someone has gone to the trouble of running a cable all the way back to the CU it may as well be on its own mcb. (Is the thinking)

I don't think he has an RCBO to hand. I guess he could use the other one, on the other light circuit if he wanted to go this way

My old belling, had 2 massive nuts. (not metric sized!), Those were when things were built proper.

It's a bungalow with later loft conversion

So you could turn all the power off. Turn off the problem light circuit MCB. Disconnect the light circuit neutral from the bar. Set your multimeter to ohms / 200R where is buzzes when the probes are connected. Measure between earth bar and the light circuit N wire. If you get a reading it's...

So does your CU contain 1 RCD, 2 RCD's or all RCBO's. RCDs and RCBOs can be identified as they have a Test button

This partly shows the safety ES holder. 1. large collar of insulating material, so you can't touch the metal when running. 2. The metal thread you can see in the picture isn't connect to a phase conduction. It only makes connection when the thread is ~90% in, and by that time, you are unable...

I don’t think you will get an agreement here. You understand downstairs will have benefits of being on a ring and if it’s easy to resolve. Sounds like your having a new cu so plenty of spare ways. As a minimum I would want 20A. Sometimes you can get 25A which would do the kitchen well. So if...

Just pointing out things have improved. Sunray. Not sure what you mean. It’s fine the lamp has metal thread

I always consider the polarity change to be an American thing, so more burgers than Germans. Polarity isn't such a problem on modern ES holders. There are 2 safety features to prevent problems. 1) The metal is enclosed so fingers can't touch it. 2) There are 2 thread rings. The one close to the...

My thought was the same as sunray. But I don’t know if we were allowed to add the additional wire between the light and left sw

Turn off that B40. See what doesn’t work. And if it’s not important, see if the trips stop too

That light circuit next to the 100mA. Any outside lights on it? Any water in them ?