Increase mcb capacity. Notifiable?

[7029 dave]

As ^^^^ nothing more to be said.

 

[Meggerman]

Dunno if this has been mentioned. But are you actually chasing a ring that isn't a ring? 2 cables in a mcb don't mean it's definitely a ring. You've tested r1 and no continuity so I could be 2 radials. You need to do more testing

It has been mentioned.

 

[Meggerman]

What is wrong with cartridge fuses? They have a higher breaking capacity than circuit breakers to BS EN 60898. I have them in my house and no intention of changing them!

They may have higher breaking capacity, but as MCB's breaking capacities is at least 6KA it is not a problem is it. I was really referring to wylex 3036 / 1361 type as there would be no RCD present (unless add on or an upfront... which is crap either way)

 

[GMES]

Good old JRC could have rewired the whole house by the time this get's resolved!

 

[Meggerman]

Good old JRC could have rewired the whole house by the time this get's resolved!

I miss that guy. I wonder if he ever found that fault?

 

[Risteard]

They may have higher breaking capacity, but as MCB's breaking capacities is at least 6KA it is not a problem is it. I was really referring to wylex 3036 / 1361 type as there would be no RCD present (unless add on or an upfront... which is crap either way)

Not saying there is a problem with the breaking capacity of circuit breakers. But there is a lot to be said for fuses, e.g. for discrimination. (60898s in series won't discriminate.) And my installation with 1361s has RCD protection.

 

[Meggerman]

Not saying there is a problem with the breaking capacity of circuit breakers. But there is a lot to be said for fuses, e.g. for discrimination. (60898s in series won't discriminate.) And my installation with 1361s has RCD protection.

In my experience MCB discrimination is not an issue in houses. A home owner being able to reset an MCB after a lamp blows instead of replacing fuses is a real plus. Have you got a front end RCD for the whole install at home or what set up do you have?

 

[GMES]

Yeah good old Jamie I will give him one thing, he could take a good bashing and hold is own, fair play to him I say.

 

[Risteard]

No, not a front-end. Just split board with not all circuits RCD-protected. Wouldn't have a problem with a front-end though if necessary. The only time it has ever tripped is with water under the kettle lol.

 

[Meggerman]

No, not a front-end. Just split board with not all circuits RCD-protected. Wouldn't have a problem with a front-end though if necessary. The only time it has ever tripped is with water under the kettle lol.

Ok mate. At a guess is that Hager or MEM out of interest?

 

[Rockingit]

1. it's not notifiable as it's not a new circuit. 2. it's optional whether or not you fit RCD> personally i would prefer to fit one if the customer was happy to pay.

Disagree. If you change the CPD then you have fundamentally changed the operating characteristics of that circuit which makes it notifiable. Otherwise, if it wasn't notifiable then logically neither would a CU change - it's not different!

 

[Andy78]

Disagree. If you change the CPD then you have fundamentally changed the operating characteristics of that circuit which makes it notifiable. Otherwise, if it wasn't notifiable then logically neither would a CU change - it's not different!

As much sense as your logic makes, that's not the scope of part P and it would not be notfiable.

 

[davesparks]

But where do you draw the line?
If changing one MCB is not notifiable, is changing two notifiable?
How about 4? Or changing all of the MCBs in a board? Or changing an mcb for an RCBO?

 

[Andy78]

But where do you draw the line?
If changing one MCB is not notifiable, is changing two notifiable?
How about 4? Or changing all of the MCBs in a board? Or changing an mcb for an RCBO?

You draw the line where part P says you draw the line which, wrong or right, is there in black and white.

 

[Meggerman]

But where do you draw the line?
If changing one MCB is not notifiable, is changing two notifiable?
How about 4? Or changing all of the MCBs in a board? Or changing an mcb for an RCBO?

The Line is drawn. It is not a new circuit, it is not notifiable. However is does require certification.