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How to supply a 20A Distribution cct?

Sorry if this is too simplistic a question but I'm wondering what you think, given I've had conflicting views from a trade assoc tech dept and Hager tech dept.


A 65m, SP+N, 20A (estimated, but could be subject to some increase) distribution cct, fed from within a commercial setting (an osteopathy/acupuncture service provided in a converted ground floor flat), is to supply a shed/summerhouse with a couple of sockets (for a kettle and TV) and a couple of LED bulkheads (via cb's in the shed CU), sited at the end of the garden. How would you supply the distr. cct at the meter position?

- From a henley block in the existing tails:

              - Its own modular enclosure containing DIN rail mounted main switch and 20A fuse carrier.

              - A rotary handled 20A fused switch disconnector.

- From a 20A cb in the existing CU.


From the trade assoc., one said from the CU, another said it's got to have its own main sw, another said no problem with the modular encl and fuse carrier. While Hager said its got to be the rotary type, not the fuse carrier.


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  • Former Community Member
    0 Former Community Member
    Z,


    As this isn't a final circuit or a lighting circuit exclusively, then I'd be inclined to call it a distribution circuit which would allow for a max. 5% volt drop. Admittedly, on a bit of 6mm² cable, you wouldn't have much room for expansion before you reach the cap of 5% and very limited on what you can power, but just playing devils advocate. I'd stick it on a 10mm².


    Just wait until they want to run a hot tub off of it!




    We aren't talking about a spherical cow in a vacuum here.

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  • Former Community Member
    0 Former Community Member
    Z,


    As this isn't a final circuit or a lighting circuit exclusively, then I'd be inclined to call it a distribution circuit which would allow for a max. 5% volt drop. Admittedly, on a bit of 6mm² cable, you wouldn't have much room for expansion before you reach the cap of 5% and very limited on what you can power, but just playing devils advocate. I'd stick it on a 10mm².


    Just wait until they want to run a hot tub off of it!




    We aren't talking about a spherical cow in a vacuum here.

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