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8 metre meter tails

Pete Murphy
Hello All,

Scenario is; conversion of basement with a 3P supply to 3 separate flats. TNCS. To get a new CU into the furthest flat I've proposed 25mm singles in Scottish Power red conduit. The conduit would be run in the correct zone in a void about 100mm above a plasterboard ceiling with no insulation at this point. I get the max current to 80A for this method and a fused switch would be installed at the origin after the DNO cut out Have I missed anything here? I'd assume to measure volt drop to the origin and disconnection times to the CU as per.

Thanks for your time,

Pete
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    I can't help thinking that SWA will be easier than drawing 25mm² into conduit. Using 3-core (one core for c.p.c. in parallel with the armour) should give you as good if not better Zs results than singles in plastic conduit too. With a steel CU and steel switchfuse, glanding off the SWA would be straightforward too.

       - Andy.
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  • 0
    I can't help thinking that SWA will be easier than drawing 25mm² into conduit. Using 3-core (one core for c.p.c. in parallel with the armour) should give you as good if not better Zs results than singles in plastic conduit too. With a steel CU and steel switchfuse, glanding off the SWA would be straightforward too.

       - Andy.
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