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How to supply a 20A Distribution cct?

Farmboy
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.


F
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    you should only be prepared to do a proper job, then that means if need be come in  with a quote that is erring on the high side to cover the pain, and be half expecting to be under cut.  If you are under-cut you have not exactly lost your dream job, and if you do get the job, at least you won't make a loss on it if it takes a bit longer.


    If the application is temporary, then an extension lead out the window may well be the correct solution for the cost-benefit trade off. It won't work very well of course but that may be where he is happy  to be. Or the other cheapo beloved of garages of a certain era, of twin and earth on a catenary wire - OK so long as inspected regularly for sun damage.
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    you should only be prepared to do a proper job, then that means if need be come in  with a quote that is erring on the high side to cover the pain, and be half expecting to be under cut.  If you are under-cut you have not exactly lost your dream job, and if you do get the job, at least you won't make a loss on it if it takes a bit longer.


    If the application is temporary, then an extension lead out the window may well be the correct solution for the cost-benefit trade off. It won't work very well of course but that may be where he is happy  to be. Or the other cheapo beloved of garages of a certain era, of twin and earth on a catenary wire - OK so long as inspected regularly for sun damage.
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