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Use of plastic backboxes rather than metal, use of multistranded rather than solid core cables for power/lighting

wpqs

I am undertaking a complete rewiring project in Malta. The local electrical regulations are based on the latest IEE Wiring Regs, but there are few unexpected practices:

  1. Plastic backboxes are used rather than metal. This is because they are chased into limestone blocks, not brick, so metal backboxes tend to corrode.
  2. Single core cables are run inside plastic conduit rather than using twin core and earth in a PVC jacket. The cables are also multistranded rather than solid core, though for some terminations the wire is capped and crimped to give a solid core like end

I want to follow local practices as far as possible, but would be grateful for any advice about the above. What changes, if any, should I ask for? What are the disadvantages/ advantages of the above?

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  • 0

    Try doing an internet search “Indian wiring versus Gulf wiring”

    shishirameng.com/.../

  • 0 in reply to Sparkingchip

    That is quite an amusing article. I could probably write a short commentary comparing UK and 'Gulf' wiring styles as well but I think I'd better not as it might come rather too close to a real Prince Philip moment...

    The real trick of course is to use an adequate wire. I'd be wary of any design in say 2.5mm2 solid core, that was so near the knuckle that the fractionally different resistance of changing to a 2.5mm flex caused it to fail or indeed altered performance measurably. If something really is that close, please use the next size up.  In terms of 'correct' cable choice that is really entirely environmental, and once inside plastic conduit the no of strands used to make up the cross sectional area is largely irrelevant, though more strands does make it easier to pull in, but the overall bundle a bit fatter.

    Mike.

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  • 0 in reply to Sparkingchip

    That is quite an amusing article. I could probably write a short commentary comparing UK and 'Gulf' wiring styles as well but I think I'd better not as it might come rather too close to a real Prince Philip moment...

    The real trick of course is to use an adequate wire. I'd be wary of any design in say 2.5mm2 solid core, that was so near the knuckle that the fractionally different resistance of changing to a 2.5mm flex caused it to fail or indeed altered performance measurably. If something really is that close, please use the next size up.  In terms of 'correct' cable choice that is really entirely environmental, and once inside plastic conduit the no of strands used to make up the cross sectional area is largely irrelevant, though more strands does make it easier to pull in, but the overall bundle a bit fatter.

    Mike.

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