Joint neutrals on lighting

[ultinator]

Hi. Up and downstairs have been interconnected in many places. RCBO's for each circuit won't work without re-wiring. Originally on 3036's. board been upgrded to RCBO's on all else. Is it better to a) put up and down on same RCBO? b) put both circuits into 6a mcb's so they are separate still. Or put an rcd to protect the two 6a mcb's in a desperate board?
there is no earth on any lighting, nor have i altered its wiring from when i arrived. So is it ok to leave un rcd protected so it stays as was or use an rcd to protect it?

id like to use and rcd to protect 2mcb's but there is only 3ways left in board(need 4 otherwise)

 

[somersetsparks]

link does work....just had a quick glance at it.....
load of patronising rubbish.....

Just read - it says in the remedies table -
bonding clamps not to bs951 - do not proceed with changing consumer unit.
What a load of crap, i think we can judge if a clamp is suitable or not

 

[shanky887614]

hmm did the guy bang his head or something?

an mcb provides overload protection

an rcbo stands for RESISDUAL CURRENT BREAKER with OVERLOAD protection


basically an rcbo is an rcd and a breaker in one magic box

 

[shanky887614]

hmm did the guy bang his head or something?

an mcb provides overload protection

an rcbo stands for RESISDUAL CURRENT BREAKER with OVERLOAD protection


basically an rcbo is an rcd and a breaker in one magic box

why would someone use an rcbo to protect mcbs is a little off really, if its tight for ways install another ccu next to it or replace with a bigger one

 

[GLENNSPARK]

why would someone use an rcbo to protect mcbs is a little off really, if its tight for ways install another ccu next to it or replace with a bigger one

as i have already pointed out i think he was refering to putting each lighting circuit on its own mcb on one side of the board.....as i have said already a no-no

 

[boycie]

correct me if im being really thick. rcds detect earth faults, so what is the point of rcd protection on a circuit with no earth ?

 

[telectrix]

if you get hold of the live you yourself form the leakage path to earth. the RCD should trip before the current through your body reaches the magical 30mA.

 

[ultinator]

not sure where were at here,
RCBO is rcd and mcb in one right
if you had an 80a main switch and then an rcd protecting two mcbs isnt that in principle overload protection and rcd protection protecting 2 mcbs.
so a 10a rcbo protecting two 6a mcb (which yes is wrong and wont be done) but isnt that the same sorta thing its overload and earth leakage protecting mcb's of a lower rating?
Also there is no more space, hence the reason of space constraints. nothing will fit..

Let the harrassment begin again

 

[boycie]

i wouldnt say your being harrassed mate ! you posted a problem just see people trying to get you to do a proper job !

 

[woko]

One RCBO, written advice for a rewire. Collect money and move on........

 

[ultinator]

I have already collected the money and moved on, but i am sending my mate from the pub to finish the last easy bits off i.e. testing and certification and the spiel about how **** the lighting is and they should pay me more to do the lighting. and they get to enter a raffle for one free minor works. the cowboy special.

But no seriously thanks to everyone, despite what some may say this forum is helpful and the people are broadly knowledgeable.

 

[telectrix]

i'm broadly, but i'm on a diet. i've cut out chips on tuesdays.

 

[telectrix]

and beer before noon.