Why do circuit breakers go up for on and down for off?

Whole-house RCDs are a right pain. At our previous house we had one spur that ran to an outhouse. If there was a storm, the house RCD would trip if the spur's MCB was turned on, but would not if the spur was turned off. After losing a freezer full of food because the whole house had tripped, we got into the habit of turning off the "outside" MCB whenever we were not using it - and especially if we were going away on holiday.

If each ring main or spur had had a separate RCD, only that circuit would have tripped if there was an apparent earth leakage problem.

But I imagine RCDs are expensive and MCBs are cheap, so circuits are protected only by over-current, and then the whole house is protected by earth-leakage RCD.

Apart from cost, is there any disadvantage in dispensing with over-current MCBs altogether, and protecting each circuit with its own over-current/earth-leakage combined circuit breaker so as to confine the power-loss to the smallest practicable set of appliances?

No metal can stand the temperature needed to go blue (>10,000K).

So why is it sometimes green for cold? My skin is never green, as I don't photosynthesise.

The chrome on my motorbike exhaust tuned blue, but not at >10000K.

I can buy MCBs for my CU for about £3.50 or RCBOs for about £35 - although I managed to find them online for about £17 when I was changing mine.

I can't think of any. There are even additional advantages - unlike most MCBs, the RCBO isolates both live and neutral when off. The ones on mine can even remain connected, but off, for working on the circuit or for carrying out insulation resistance testing.

Yes, patients like my sister who is undergoing chemotherapy and is now in isolation, having picked up a chest infection and norovirus in hospital.

Is that going to happen tho given the way you lot are so keen on ring mains ?

I had 15. Only thing they did was piss on a few monitors and delaminate them.

That's an accurate butt. I can see 999, but not 911.

Don't be ridiculous. Cats have stereo vocal chords.

Mine couldn't locate themselves for peanuts. Maybe I shouldn't have fed them peanuts.

Most people get along with their neighbours. And aren't those 8x LNBs 8 seperate devices? Buggering one won't break the others.

They don't have to know. It's us that buys the tyres.

That's no more meaningfull.

Very unlikely for all those things to happen at once. I didn't get vaccinated either, I never wear a seatbelt, and I never enter the lottery. Remote chances don't interest me.

The multiple LNBs/transponders (or whatever) won't be for different users, they'll be for different muxes, i.e. frequencies/polarisations.

And neighbours might get on in a "Good morning, how are you" kind of way, but that doesn't mean they will realise that their system is buggering up others' reception, as that is a technical matter.

Starboard=steerboard, and most steersmen were right handed.

No, they are for different tellies. Because there are so many muxes and frequencies that its so unlikley that you will want to view two programs on the same mux, that each port on the wall into which a telly plugs has its own LNB.

And neighbours might get on in a "Good morning, how are you" kind of

I wouldn't think they are

Loosey lefty and righty tighty. For bolts...

I remember as a lad going to nick a few light bulbs from cars at Ron Charlton's scrapyard. Whilst going about that we noticed the number of cars that had very bent steering wheels, this i was told was because the drivers having hit most anything their body flew forward and their chest impacted the wheel and bent it, and no way could we bend it back.

Ron's old boy there said that most all the drivers in that sort of impact didn't survive:(

Then came a seatbelt's and that became a thing of the past once people started using them and we got round the stupidity of "its better to be thrown clear of the car you know" idiocy.

I know someone who's an ex A&E consultant he'll give you chapter and verse on car injuries;!...

So you could use a lightbulb as a fuse?