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Commercial 400v supply quality

Philip Conlan

I recently came across this DNO cutout and wanted to get other opinions on its current state. 

I'm trying to get a better understanding of what is "good practice" when it comes to commercial and industrial installations.

For me I notice...

- the main cutout is positioned upside down. 

- the extra cable entering the top connecting a single phase, with the exposed earthing conductor connecting to the MET. 

Is this acceptable and also is there anything else that that would require attention?

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  • I have seen much worse.

    The incoming cable generally enters the cut out from below, but I am not aware of any requirement to do it that way. The main earthing conductor looks rather small but might be just adequate.

    The relatively tight bend in the service cable is slightly concerning. probably OK if it has always been like that, with the bend made in new cable and the connections in the cut out made after bending the cable.

    If however the bend was made by some unauthorised person whilst relocating the cut out, then I would be concerned that the now well aged cable might have been damaged and/or the connections strained or loosened. 

  • in reply to broadgage

    Oh I have no doubts there are worse out there, I'm sure I will come across some horrors. 

    I'm pretty sure the service cable has been like this for some time now so I'm not too concerned about that, but it could well be that it has been moved a few years back to accommodate a new building structure adjacent to it. 

    Thanks for your response.

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  • in reply to broadgage

    Oh I have no doubts there are worse out there, I'm sure I will come across some horrors. 

    I'm pretty sure the service cable has been like this for some time now so I'm not too concerned about that, but it could well be that it has been moved a few years back to accommodate a new building structure adjacent to it. 

    Thanks for your response.

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