Hello, I have a 16amp fuse which I want to change or at least thinking of changing too a 32amp there’s currently no wires coming off it. Can I first wire a 4mm cable from a 16amp in case I do change to 32amp? Also I’m going to wire this to my shed. I’m going to wire up a few double sockets as a radial circuit from this fuse too my shed. I’m wondering if this is plausible using the 4mm on the 16amp incase I need to change too 32amp. As well as is it ok to wire say 5/6 double sockets onto a board in my shed as this shed workshop is going to be a music production area so will need a lot of plugs. Many thanks in advance. If there’s a qualified electrician I can talk too or someone who knows what they’re doing that I can personal message this would be ideal. Thank you .
As said the domestic wiring is not simple, however in the main we follow convention then test to see if it's within the limits.
I am not that good at maths, so I wrote myself a java script program to test if I am within limits, so to start with 4 mm cable is rated between 17.5 amp and 37 amp depending on installation method.
Volt drop also varies 12.8 mV/A/m to 10.3 mV/A/m but in the main we don't wire to limits, although as a SWA cable the 4 mm can take over 32A buried installation method 100 which it is likely to be valid for part of run down brings you down to 27A.
It is rare to use 32A on a domestic socket circuit, and because a consumer unit or new circuit needs notifying under part P to DIY a shed or garage normally one would limit the supply to 13A as the price sores if you need to notify.
This is going to be for a music production studio. So I’ll have music equipment. Can I make a radial circuit but on a wooden board? And I currently have 3 spare 16amp that I am going to wire down too the shed. Well only wire one down. But was thinking of changing it too a 32amp as I thought 16 may not be enough. Can I run a 4’mm cable from a 16amp fuse as I don’t see why I couldn’t use a large diameter wire as long as I don’t use a smaller one than 2.5mm if that makes senses
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