I used high temperature cable for one element and even higher tolerance for the other, which is a longer run so that I can use seperate power sockets. Two elements get to the boil quickly, and one is enough to keep it rolling. Jobs a good ‘un – can’t wait to fit a hopstopper and use it anger!
The Boxshed Brewery 
That looks the nuts matey! So you don’t need 3 phase or anything for those elements? Where did the cable come from?
Thanks, glad you like it – it’s still working well, too! Obviously knocking up a boiler yourself isn’t *actually* very sensible and there are all sorts of dangers and legal issues involved with not being a registered plumber / electrician etc… etc…. But as long as you know that, it’s a great project. I used BES for most of my parts – they are good value and nearly always deliver next day. Cabling is important, obviously, and you really can;t use too long a run of it. You should be able to find 20A and 25A at any specialist electrical supplier. I found some at a local ironmongers and some I just happened to have already. I would LOVE three-phase power, but this works by running each element to a separate mains ring, both of which fortunately present in my garage. Ideally I would have a nice dedicated ring in there with ‘commando’ sockets. Don’t burn out that big hole saw!