Are RCCB main switches ok to be used for 17th Edition installs?

[beatboaby924y]

Hi

Well guys wondering if you could help me, I went to price a loft conversion job yesterday where the guy is converting his loft into a bedroom and bathroom. I was probably going to run a new ring main for the sockets and a new lighting circuit for the lights which there is space for in the db. However I found a rccb main switch protecting the db and I was wondering if this is up to 17th edition standard or if the main switch would need to be changed to a rcd main switch (if I could source one) or if the db would need to be changed altogether to one with dual Rcd's incorporated in it?


I understand that rccb's detect's unbalancing in the load when it trip's and doesn't give overload and short circuit protection like a rcd does but wasn't sure if it still could to be used for 17th edition installs. Obviously depending on this will effect the price of the job.


Sorry if this is a stupid question but when I did my 17th edition I can't remember them covering rccb's only the new type of dual rcd dbs. Don't know if maybe I just answered my own question :bulb2:, but thought I would check with you guys first.

Thanks in advance.

Rob

 

[DurhamSparky]

its fine as long as its 30ma!....!!! make sure bonding is in place!! an RCCB is Just another name for a RCD!

 

[Guest123]

An RCD doesn't offer any overload protection either.:wink_smile:

 

[beatboaby924y]

Thanks for your input guys.

Yeah it was 30mA. Always thought that they were different, learn something new every day.

 

[Knobhead]

RCD = Residual Current Device
RCCB = Residual Current Circuit Breaker

Both taste the same.

 

[nikmet]

Were you thinking of ELCB when you were thinking of a difference?

 

[Top Cat]

RCD = Residual Current Device
RCCB = Residual Current Circuit Breaker

Both taste the same.

Were they both live when you tasted them!

Went to a manufacturers presentation a while back on RCD's. He said they were the best on the market. We asked him to prove it by touching live to earth but he would'nt!

 

[Knobhead]

Were you thinking of ELCB when you were thinking of a difference?

Two totaly different animals.

 

[Deleted member 26818]

It's RCBOs that provide overcurrent protection.
Residual Current Breaker with Overload.

 

[rich.250]

I thought Rcd was just a term to cover rcbos and rccbs??
Rcbo have overload as spin said.

I would try to put new ccts in a seperate cu or change the
Cu to try and get some segregation in the event of a fault.
Don't loose it all etc.
I think reg 314...

 

[beatboaby924y]

think I was getting mixed up with rcbo's.

 

[malcolmsanford]

Hi

Well guys wondering if you could help me, I went to price a loft conversion job yesterday where the guy is converting his loft into a bedroom and bathroom. I was probably going to run a new ring main for the sockets and a new lighting circuit for the lights which there is space for in the db. However I found a rccb main switch protecting the db and I was wondering if this is up to 17th edition standard or if the main switch would need to be changed to a rcd main switch (if I could source one) or if the db would need to be changed altogether to one with dual Rcd's incorporated in it?




I understand that rccb's detect's unbalancing in the load when it trip's and doesn't give overload and short circuit protection like a rcd does but wasn't sure if it still could to be used for 17th edition installs. Obviously depending on this will effect the price of the job.


Sorry if this is a stupid question but when I did my 17th edition I can't remember them covering rccb's only the new type of dual rcd dbs. Don't know if maybe I just answered my own question :bulb2:, but thought I would check with you guys first.

Thanks in advance.

Rob

Can I ask why you want a ring final and a new lighting circuit for just a bedroom.

 

[beatboaby924y]

It was just to split the circuits up. Also the rest of the house is done in conduit so would save breaking into it. Could of course still do that if I get the job.

 

[GLENNSPARK]

I thought Rcd was just a term to cover rcbos and rccbs??
Rcbo have overload as spin said.

I would try to put new ccts in a seperate cu or change the
Cu to try and get some segregation in the event of a fault.
Don't loose it all etc.
I think reg 314...

but you start going down the change the C/U route......can of worms is that as you will have to provide an EIC.....together with a schedule of inspections and schedule of tests for all circuits fed from that C/U...who knows what nastys you might find...lol.....if no room then an add on board is the way here.....

 

[GLENNSPARK]

and as has been said here already....RCDs give earth fault protection.....RCBOs give both earth fault and short circuit protection..,...