Indeed, I would need to have new cable run from the distribution board=20 which would have a circuit breaker with combined RCD. According to the blurb has an internal leakage protection, which appears to= =20 be an auto reset type, though i'd like to take the unit apart to check=20 that. The earthing would be back to the house earth point in the distribution=20 box. I foresee some problems as this type of heater is not common here at all=20 and electricians may well scratch their heads, it's difficult enough to=20 obtain 4 and 6mm^2 twin and earth though not impossible. In the UK (unless it has changed) showers units of this type must be have=20 their own 30A circuit with pull cord power interrupt by the shower. Water=20 supply must be direct from the mains not via the water tank. Australia=20 doesn't have cold water tanks installed in houses, everything is via the=20 water main. Colin -- cdb, colin@btech-online.co.uk on 27/02/2012 =20 Web presence: www.btech-online.co.uk =20 =20 Hosted by: www.justhost.com.au =20 =20 This email is to be considered private if addressed to a named individual= =20 or Personnel Department, and public if addressed to a blog, forum or news= =20 article. =20 =20 =20 On Sun, 26 Feb 2012 11:31:02 -0500, Carl Denk wrote: :: : Make sure there is a GFCI with proper connections to the internal :: electrical parts of the unit. I believe the NEC (USA electrical :: code) :: would require that, as electrical outlet within arms reach of a :: water :: source. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .