Failed MCBs on Volex consumer unit

[NotMe]

Bought a pre-assembled split load cons. unit from Screwfix

?id=82204&ts=15099) a couple of months ago.

Fitted it and connected everything apart from the light circuits as I was planning to re-wire all of them at a later stage.

Today I finished re-wiring the light circuits, and found out that 4 of the 5 MCBs (the four left-most in the picture) have all failed. They have not been used since the box was bought, and are clearly faulty - switches either up (on) or down (off) result in no contact.

Nothing major (never had a problem with Screwfix in these situations, and I will be very surprise if they don't replace the faulty ones) - just looks a bit strange....

Any thoughts?

[legin]

The bus bar is under the tightening terminals at the bottom as opposed to clamped inside?

Regrda Legin

[legin]

The bus bar is under the tightening terminals at the bottom as opposed to clamped inside?

Regrda Legin

[ARWadsworth]

This seems to be common on Volex boards. They are a swine to add a new breaker without dropping the bus bar.

Adam