Rcbo neutral and functional earths

[Ian1981]

Thoughts on this please, functional earth leads obviously showing signs of heat damage, the greenish coloured neutral leads compared to the blue ones are coloured throughout their length, maybe heat has caused this?

 

[Ian1981]

They are functional earths and should be coloured cream tho I think the colour has now changed to pink, they are white looking normally, they have definitely changed to a darker shade.

 

[Lucien Nunes]

If the yellowing is caused by airborne contamination, I would expect that where the flyleads are cable-tied together, surfaces in close contact would be less discoloured. The discolouration could have occurred before installation, but it still seems odd that the neutral tails are so uniform as they would have been bundled up. I agree with posts above that heat alone is not the cause. Parts near the heat source would have burnt or melted before the rest had been so strongly affected.

It will be interesting to hear back from Schneider, but until they respond, I would not rule out the possibility that they are counterfeit. Schneider / Merlin Gerin MCBs have been faked in the past although crudely, they were merely switches with no tripping mechanism. But in my line of work we see fake products that can seem to work well unless pushed hard. Of course a faker would probably want to avoid any visual clues such as abnormal colours, but their QA procedure is probably less exacting than Schneider's.

 

[freddo]

Would be interesting to hear the outcome! Those functional earths are really yellowed compared to how new the rest of the unit looks

Schneider / Merlin Gerin MCBs have been faked in the past although crudely, they were merely switches with no tripping mechanism. But in my line of work we see fake products that can seem to work well unless pushed hard.

I have been installing some large air handling units and a chiller over the last week, the chiller control panel has a Schneider MCCB switch as an isolator and various Schneider contactors, none of them look quite correct. Hope they aren't fake too. The unit screams 'made in china' with it's sloppy construction and incoherent labels and instructions.

 

[freddo]

|Somehow posted twice!