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LEE WARD: HERE WE HAVE A METAL ENCLOSURE WITH THERMAL FIBREGLASS INSULATION USED AS WIRING PROTECTION – SCARY!
To protect cables when they enter a consumer unit we should use appropriate methods, accessories and fittings. This could include rubber or PVC grommets for a simple cable installation to offer the cable protection against sharp metal edges. For meter tails this might be a cable entry gland that has the line, neutral and earthing conductor installed through the same gland. This would provide secure and sealed protection from damage and external influences.
This installation has a few issues. The meter tails have no means of support for the cables and terminations. The use of fibre glass wool to prevent abrasion from the sharp metal edges would not offer much in the way of protection. This also would not offer any protection from wires or fingers being pushed through the openings and therefore allowing access to live parts.
One other thing to bear in mind is that the use of fibre glass wool would not increase the protection against the spread of fire.
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