To true Tab!!! And to think they are letting me wire up a school! I just put $40,000 of lightening protection in, lots of green and yellow wires, lets hope they are right! All metal buildings up here. As long as the input current isnt more the 10 amps, you can use a heavy duty lead, active - red/brown neutral - black/blue and there should be somewhere for earth to go, either a screw clamp or something like that. The pic is a little unclear, but that last screw in the terminal block should be the earth. just cant see what lines up with what very well. Felix