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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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  • That earthing conductor is a bit iffy. Mine at home is similar and looks very weedy, but in fact it is 4 strands of 4 mm² copper so all is well. However, I can make out only 3 strands in this installation.

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  • That earthing conductor is a bit iffy. Mine at home is similar and looks very weedy, but in fact it is 4 strands of 4 mm² copper so all is well. However, I can make out only 3 strands in this installation.

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