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Outbuildings - multiple consumer units

Former Community Member
Former Community Member
Evening all,


In a situation where I'm shortly going to be rewiring a new house I'm moving into and am hoping someone can provide me with some clarity on the best way to provide power to multiple outbuildings. 

Essentially I had planned to install a main consumer unit indoors and then feed the outbuilding via an RCBO on this consumer unit, i.e. consumer unit to, twin and earth, to junction box internal, to SWA across the garden, to secondary consumer unit in outbuilding - repeat this 2 or 3 times to the various outbuildings I need power in. However when doing a bit of research on the subject there seems to be differing opinions on whether to do this or to install a Henley block at the main incoming supply and then come out of that with one feed to my 'main consumer unit' and another feed out to the 'secondary outbuilding consumer unit' or multiple consumer units. It never occurred to me that this was an option and frankly I'm in a muddle as to what the consensus is on best practice, some mentioning a Switched fuse also.


If anyone could give me their opinion on what the safest and best practice is i'd be extremely grateful! TIA
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  • 0
    If the water pipe to the main outbuilding is plastic, it won't (can't!!) need bonding. Definitely take the possibility of a car charger into account when rating your SWA for the distribution circuit. It might give you more options with the car charger later on, if you make that outbuilding TT. I'd be inclined to make all the outbuildings TT. Use the house earthing arrangement to protect the SWA only. That depends on how easy it is to get rods in. You know the site best.


    Dave
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  • 0
    If the water pipe to the main outbuilding is plastic, it won't (can't!!) need bonding. Definitely take the possibility of a car charger into account when rating your SWA for the distribution circuit. It might give you more options with the car charger later on, if you make that outbuilding TT. I'd be inclined to make all the outbuildings TT. Use the house earthing arrangement to protect the SWA only. That depends on how easy it is to get rods in. You know the site best.


    Dave
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