try using the "how to section"
I will give you a clue.......
its here http://www.diynot.com/pages/el/el085.php
(and before you start moaning that that is for a shower, they both have the same thing in common, they both use electricity to heat an element) and when you have done it go for the BIGGER size
To try an be a liitle helpful... assuming a UK supply of 240 volts an 11Kw load would require a minimum of a 45amp rated supply. this would mean a supply cable of at least 10sq mm from the consumer unit and a sutable MCB or fuse in the consumer unit. Hope this helps.
yes that is true, by my point is that all the poster had to do was to look in the how to section, and it says 6 -10mm cable and as i said use the bigger one.
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