Why do we do it the way we do in the UK?

[Electrics]

Was just watching a video of an RCBO install and found it weird that the breakers are double pole yet still have to have a fly lead.

Why don't we do it like this:

Ignore the gibberish coming out of his mouth and take a look at the unit. L+N coming from the supply, feeding the bottom of the first RCD. All the RCD's are linked together by the linking bars running down the left, giving them all L+N feed. The feed then goes through the RCD out the top, into the bus bar that's linked across the tops of all the MCB's. The L+N of each circuit comes out the bottom. This does away with the need for a neutral bar (there is one but they are used when there is no linking bar employed and you have to run an N to each RCD), several main neutral cables and the need to fill the unit with loads of extra cabling, not to mention cost saving on the materials.

Why, even with dual pole RCBO's, do we still make them use fly leads when we could simply link them all to N via the main RCD in? Makes no sense to me.

Having said that we're still the only country i know of that uses rings.

Anyone think we'll eventually catch up and stop doing things in such weird ways? Although i guess one drawback of the way they do it in Europe is that their multi tier units are standard for almost any regular sized home and they are anywhere from £3-700.

 

[telectrix]

My spelling is gone to pot?

pot or pit?

 

[Julie.]

My spelling is gone to pot?

You've let your English teacher down,
You've let your fellow electricians down,
But most of all

You've let yourself down.....

 

[telectrix]

but his teacher is Irish. ?

 

[Julie.]

but his teacher is Irish. ?

To be sure.

 

[telectrix]

remindsme of the air fungus pilot sends out a mayday. controller asks him his height and location.....

" Oi'm 5 ft 10in. and sitting at the front. of this machine"

 

[Julie.]

remindsme of the air fungus pilot sends out a mayday. controller asks him his height and location.....

" Oi'm 5 ft 10in. and sitting at the front. of this machine"

 

[LastManOnline]

but his teacher is Irish. ?

I am determined to never spell showir incorrectly again

 

[Mikegh]

Just getting round to having a good look at that

DP Isolator and ssd's part of the changes to rules

Bathroom and general lighting now shared on rcbos, single pole(note the sign lol, no ir testing at load terminals, dunno about that likely a backward step imo )

All type A 30ma protection , think Hagers been that way for a while ?

Presume you're fitting control for 2 instantaneous showers?

 

[Mikegh]

That's re:the Hager board lastmanonline fitted. ^^

 

[LastManOnline]

Presume you're fitting control for 2 instantaneous showers?

No. It's just one shower. But from now oni, m going with a Co tractor and running a 10mm straight to shower. I had hoped to have the DB installed today but could, nt start until late afternoon. Anyway have a, peeka at the attached pic

 

[nicebutdim]

Showur.

 

[LastManOnline]

Showur.

I wondered how long it would take for someone to bite. As always you are wide alert.

 

[nicebutdim]

Almost out of vowels, but thankfully I know four of them ?

 

[Mikegh]

No. It's just one shower. But from now oni, m going with a Co tractor and running a 10mm straight to shower. I had hoped to have the DB installed today but could, nt start until late afternoon. Anyway have a, peeka at the attached pic

Ah yes ok but there is a problem with that method and I've seen it in use occasionally

I presume you're running a control pair to a switch to control the supply to the shower

The problem is that unless you break the 10sq supply using an Isolator you're not actually providing local isolation

I would stick with the isolator, a crabtree ceiling mount Isolator works well

 

[LastManOnline]

I presume you're running a control pair to a switch to control the supply to the shower

Yes. There will be an "on/off" control switch outside the door.

The problem is that unless you break the 10sq supply using an Isolator you're not actually providing local isolation

I, ve not heard that particular take on it myself. I do know that this method of installation is becoming increasingly more common. I also think that most 40/50 amp isolators are not adequate for 10mm.