MCB ratings for CBus modules

["Tracey Gardner" <tracey.gardner@xxxxxxxxxxxx>]

Isn't the breaker in circuit to protect the cable not the fitting?
If the cable is 1.00 sq mm then it will carry 10 amps, so a 10amp or 6amp
MCB would be appropriate.
Why would you want to go as low as 1or 2 amps?

Tracey

>>
>> As far as i am aware "C" curve type circuit breakers are
normally used in
>> a
>> Domestic install here in Oz.....Wasnt aware of  "B"
curve  circuit
>> breakers(although have used "D"curve for motors)  ,
which seems to be
>> what
>> people should be using on the load side for each dimmer
channel......
>> Would
>> be good to get something smaller than 6amp..........2amp available
in B
>> curve ???...........
> Under fault conditions (like a lamp blowing), the current seems to go
much
> higher than 6A
> anyway (since it trips a B type 10A & 16A MCB, although not a B
type 32A
> MCB) - so is
> there any practical difference between a 1A/2A MCB and a 6A one? Would
a
> 2A MCB of the
> same type as a 6A MCB trip first? I guess that since the current
reaches
> the limit of the
> 2A MCB fractionally before  it reaches the limit of the 6A MCB, it is
> possible. But I
> would have (naively) thought that the difference in time is
insignificant.
>
> I can see there's a difference if you were worried about somebody
> installing lights that
> run beyond the 1A limit - but since this is a domestic install that I
> control, that's not
> going to happen.
>



--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 266.9.5 - Release Date: 07/04/2005