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What are the requirements for a consumers main switch on a TPN 200A new supply ? Can the tails from the metering go straight into a panel board with a 4 pole 200A MCCB as the main switch, or do you have to install a separate isolator

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The new mains cut out and metering are being installed shortly , this will feed a 250A Panel board adjacent to the service head. The panel board will have a four pole 200A MCCB as a main switch and will therefore isolation all of the upstream installation. It seems pointless installing a separate main switch but will the supplier accept this and will it comply. UKPN and the electricity supplier  are sitting on the fence , well they would be if you could talk to anyone !

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    Just spotted this - apologies for the late reply.

    I have seen installations in the UKPN area exactly as you describe - panel board with MCCB main switch fed directly from the cut-out (CT metering). Cables in 100x100 metal trunking for neatness and protection.

    Having an isolator in between obviously has some benefits as Andy said. Disadvantage is that an 200A isolator is large and expensive, also it's another possible point of failure.

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    Just spotted this - apologies for the late reply.

    I have seen installations in the UKPN area exactly as you describe - panel board with MCCB main switch fed directly from the cut-out (CT metering). Cables in 100x100 metal trunking for neatness and protection.

    Having an isolator in between obviously has some benefits as Andy said. Disadvantage is that an 200A isolator is large and expensive, also it's another possible point of failure.

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