12Kva to 20Kva single phase domestic upgrade

FintanMcluskey · 26-02-2024 9:51pm #1

Hi all

Trying to do some figuring out which is the best domestic upgrade option to supply a garage with welder, air compressor etc.

Currently the house has has 12Kva supply which won't be sufficient to power a welder in an adjacent garage etc.

3 phase is cost prohibitive, so I'm thinking of upgrading to a 20kva single phase supply to the house and subsequently bringing a cable out to the garage.

My question is, is such a supply (20kva) sufficient for the welder in the following link?

Is it OK to bring a supply from the house fuse board to a nearby garage to supply such a welder?

https://www.mauricedoodysales.com/oxford-swf-mig-welder-410amp-220v

JL spark · 27-02-2024 12:07am

Anything is possible,

your existing installation will need work , the mains cable will need changing along with the board , test whole house and certify, new earth rod outside too in 16sq cable ,

what age is the house

Lenar3556 · 27-02-2024 10:56pm

That welder would need the guts of 10KVA, so 20KVA would seem fine. But it may end up quite expensive. The house might need quite an upgrade.

Depending on the amount of this work you are doing, a 20 kva diesel generator - at maybe €6k + vat might be worth considering, particularly if it was only a few hours a week.