Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 38 replies
  • Subscribers 32 subscribers
  • Views 8218 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

EICR C3 mixed manufacturer breakers

Martyn
I know this will have been discussed in the past but we are on Amd 1 of the 18th now so I thought I would renew it.


The Best practice guides list mixed manufacturer breakers in a consumer unit or distribution board as a C3.


As far as I am aware Bs7671 does not have a Reg on it beyond manufacturers instructions and given EICR's are based on this standard perhaps it is justified on that basis.


Most on here will be familiar with the 16kA 'rule' in BSEN61439 Annex ZB or its predecessor BSEN60439 Annex ZA


I avoid C3's like the plague because they give all the wrong signals to a client and clearly by definition are for things which are a breach of the regs, I'm not too keen on the insurance risk of a C3 either.


My question here would be what fault rating can one apply to an enclosure where there are mixed breakers given a manufacturer will only have certified their equipment with their devices?


Enjoy!


Martyn
Parents
  • 0
    Looking at the lack of distortion or cracking to the outer plastic shell, and the fact the exposed tops of the brass rivets look like they have been cut or drilled, while the inside has failed, I think the plastic case contained the worst of it, and it has been opened after the fact as part of a forensic operation as to why it is not working and smells of burnt.

    The de-soldered bridge that is on the wonk , and the burnt out track in the middle of the figure indicate a failure of the electronics, not a gross overload of the breaking mechanism - as Alan alludes overloaded breakers look poorly at the arc traps - weld lines and the metal bent like warm toffee are the overload clues missing here.

    If you have a photo of the other side of the PCB it my be possible to work out the make.

    I think the factory date is july 2012
Reply
  • 0
    Looking at the lack of distortion or cracking to the outer plastic shell, and the fact the exposed tops of the brass rivets look like they have been cut or drilled, while the inside has failed, I think the plastic case contained the worst of it, and it has been opened after the fact as part of a forensic operation as to why it is not working and smells of burnt.

    The de-soldered bridge that is on the wonk , and the burnt out track in the middle of the figure indicate a failure of the electronics, not a gross overload of the breaking mechanism - as Alan alludes overloaded breakers look poorly at the arc traps - weld lines and the metal bent like warm toffee are the overload clues missing here.

    If you have a photo of the other side of the PCB it my be possible to work out the make.

    I think the factory date is july 2012
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines