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JOHN RAMSAY: 3 PHASE TAILS ENTRY…
BS 7671 requires the protection of cables during selection, installation, inspection and testing. This is to ensure that the cables are not damaged.
The method shown for the entry of the meter tails into the metal enclosure has not taken into the account the requirements of Regulation 522.8.5. This ensures that cables and conductors are supported and not exposed to undue mechanical strain.
Regulation 526.7 is also applicable here; where a connection is made to an enclosure there will be adequate mechanical protection and protection against other external influences.
There has been no attempt to provide any form of protection by not utilising a proprietary cable gland to secure the terminations. There also has been no effort made to protect the cables from abrasion from the sharp metal edges of crudely cut holes in the metal distribution board. The remaining metal swarf within the distribution board can result in further damage to the cables and terminations.
Therefore, the classification code would be a C2, Potentially dangerous, urgent remedial action required due to the risk of damage and strain on the terminations.
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