John Rumm wrote:

The only type I have seen are the very high sensitivity clamp meters,
that you place around the phase and neutral to your appliance / circuit
/ whatever of interest. They then measure the (very small) imbalance if
present.

Not cheep mind:

http://wiki.diyfaq.org.uk/index.php?...up_access_tips

Err, error no. 42: context mismatch in link destination :~) Perhaps you
meant http://www.martindale-electric.co.uk/clamp.htm#cm67

--
Andy