don't use rcbos for TT

[mrloy99]

Manufactors instruction leaflet states {on schneider electric rcbo)
Do not use on installations that require double pole switching eg IT or TT.

 

[Geordie Spark]

I’ve only got two RCBO’s in my flat, they’re coming out as soon as I get around to it.
I priced up Hager DP units, good job I was sat down when I saw the price. There’s bags of room in the board so a couple of MCB’s and a second RCD will be going in. It also means I can split the two rings between the two RCD’s. BTW it’s a 16[SUP]th[/SUP] board.

Before you ask, it’s how I found it when I moved in.

Are you sure you are competent to carry out this work??

 

[D Skelton]

Oh dear Tony! Carrying out electrical work in a house without being NICEIC registered! Don't be suprised when the Part P police come a'knocking! A cowboy now as well as a Yorkshireman, it just keeps on getting better and better!

 

[Geordie Spark]

Oh dear Tony! Carrying out electrical work in a house without being NICEIC registered! Don't be suprised when the Part P police come a'knocking! A cowboy now as well as a Yorkshireman, it just keeps on getting better and better!

Shall we flip a coin or spin a bottle of something to decide which of us is going to grass him up? :devil:

 

[GLENNSPARK]

Oh dear Tony! Carrying out electrical work in a house without being NICEIC registered! Don't be suprised when the Part P police come a'knocking! A cowboy now as well as a Yorkshireman, it just keeps on getting better and better!

but i am...and he rang me up asking if i`d do it for him....

which kind of blows geordie`s sly comment at #21 out of the water as well......:27:

 

[Geordie Spark]

but i am...and he rang me up asking if i`d do it for him....

which kind of blows geordie`s sly comment at #21 out of the water as well......:27:

More like Tony phoned your mother and she told you get round there and do it.

 

[GLENNSPARK]

More like Tony phoned your mother and she told you get round there and do it.

oh so he told you did he?...

only half the story as i was also told that if i didn`t i was to `get up them stairs without no tea`...

 

[Geordie Spark]

oh so he told you did he?...

only half the story as i was also told that if i didn`t i was to `get up them stairs without no tea`...

I like your mother ... she has style.

 

[telectrix]

didn't do a good job of passing it on though. :24::tank:

 

[GLENNSPARK]

I like your mother ... she has style.

yeah...she has.

 

[GLENNSPARK]

didn't do a good job of passing it on though. :24::tank:

my style comes across loud n clear in my posts & replies...

its a style all my own.....aften imitated...but never matched....

 

[telectrix]

can't match that. i only got a couple of zippos.

 

[GLENNSPARK]

can't match that. i only got a couple of zippos.

not much then against my..erm...5 i think ...at the last count...

 

[telectrix]

but i bet you not got a harley davidson one. that's worth 3 "ordinary" ones.

 

[GLENNSPARK]

but i bet you not got a harley davidson one. that's worth 3 "ordinary" ones.

well no...

see when i get them i dont plan on riding out for a week....

it just sort of....happens...

 

[not clever]

Do you know of any manufacturers that make single module double pole RCBO's?

I do & so do you, you'll have to visit the other forum to see & purchase them though.....................

 

[D Skelton]

I do & so do you, you'll have to visit the other forum to see & purchase them though.....................

You've lost me

 

[mrloy99]

What they are trying to say is RCBOs are single pole and should not be used where double pole is required, They are not saying do not use on tt, why would they?

I think they are......In a TT installation neutral is also classed as a line conductor,And as such if isolation to a particular circuit is required for maintenance or alteration we are supposed to be able to isolate both poles without having to knock the whole installation off via the mainswitch RCD. I am thinking that double pole CBs could be the answer(rather than dp rcbo's) I know that they are available,and you are still 30ma protected via main switch rcd. I'm a wee bit surprised mr Niceic hasn't made an issue about this before.

 

[D Skelton]

I think they are......In a TT installation neutral is also classed as a line conductor,And as such if isolation to a particular circuit is required for maintenance or alteration we are supposed to be able to isolate both poles without having to knock the whole installation off via the mainswitch RCD. I am thinking that double pole CBs could be the answer(rather than dp rcbo's) I know that they are available,and you are still 30ma protected via main switch rcd. I'm a wee bit surprised mr Niceic hasn't made an issue about this before.

Because it isn't an issue. DP isolation is all that is required on a TT installation, it doesn't say where. Also, a neutral is never a line conductor.

 

[Knobhead]

Oh dear Tony! Carrying out electrical work in a house without being NICEIC registered! Don't be suprised when the Part P police come a'knocking! A cowboy now as well as a Yorkshireman, it just keeps on getting better and better!

There's a way around it. As I'm retired I'll get Glenn to do it for me

 

[Engineer54]

Originally Posted by mrloy99
. I am thinking that double pole CBs could be the answer(rather than dp rcbo's) I know that they are available,and you are still 30ma protected via main switch rcd. I'm a wee bit surprised mr Niceic hasn't made an issue about this before.

Far more sensible to have an all RCBO (SP+N) CU, than a couple of RCD's and a rack of DP MCB's, on a TT installation!!

Also have you considered the size that 10 circuit DP CU will be?? You'll be looking at providing at least a 26 way CU, including the DP isolation switch and 2 X RCD's, and that's not allowing for say a couple of spare ways for the future!! ...You won't be purchasing one of them for 50 odd quid!! lol!!