I always wondered what the little holes are for!

[Phil Thompson]

So you’re really Pedantic Pete lmao

 

[Marvo]

If you link single pole MCB's across the toggles like this the spring inside one of the MCB's isn't strong enough to trip all three so it just leaves 2 of the phases connected if there's a tripping fault on one phase.

Replace it with a T/P MCB.

 

[Phillip]

Come on guys and girls, that's a big no no mod. Expected one MCB trip to switch all three is asking a bit much. What if one trys to trip, and the other two mcb's says no your not. I think you can see what could happen next. The big and only answer to thist is get this/who firm to court.

 

[DPG]

Come on guys and girls, that's a big no no mod. Expected one MCB trip to switch all three is asking a bit much. What if one trys to trip, and the other two mcb's says no your not. I think you can see what could happen next. The big and only answer to thist is get this/who firm to court.

I think we already agree on that one.

 

[*-jester-*]

Some 1 pole MCBs can be linked together, I've seen it in control circuits on multi-phase or multiple supplies (essential & non-essential etc) ...but it is achieved using a linking mechanism that connects adjacent MCBs through a removable cover on the side of the MCB.
HOWEVER these link kits usually include a link bar.

So I agree with the consensus that a piece of copper wire used as a link bar is definitely dodgy.

 

[chrisdungan]

Really!!
which ever way you spin this it has a bad feel to it.
Whats the rest of the PV instal like?
DC string or microinverters??
I'd want to cast a very critical eye over the whole PV system.
If it's a DC string system just remember it will be generating high voltage DC not a huge current but if a fault develops in the DC side it can have very nasty consequences

 

[PJElectricalSW]

Thanks for the comments, I don't think the install is particularly good to be honest.

I do not know any details of the installation company and whether the main electrical contractor also installed the PV or not but there are a lot of other very curious installation 'quirks' that I do not think are correct.

The more I look the worse it gets, I have just been fire fighting at the moment doing the critical work. I shall be back in the new year to carry out a full report and tidy the DB. Who knows what lurks inside there but I know rats would be right at home in there!

edit: I guess it would be the last one to touch the board would be in court defending himself (me) and the PV guy should be sweating!

 

[Jymbob]

Hm. Given the feed in tariff is about to vanish I wouldn't be surprised if a lot of questionable companies are throwing out as many installs as they can to clear stock and get their cheques from the government before they quietly dissolve the company and swan off to pastures new!