On Wednesday, June 19, 2013 9:38:12 AM UTC+1, Richard Russell wrote:

As it happens the point is moot anyway. As an experiment I bypassed the RCD so I could power up the circuit for a few hours. The result is that (maybe through some local heating drying out the moisture) the leak is now reduced below the trip threshold and it's running fine again with the RCD re-instated. The problem may recur, of course, but I'll worry about that if and when it happens.

it inevitably will.

Converting to 12-0-12v is another option


NT