On 29/4/09 10:05, Michael Lush wrote: > A frend of mine has a Power Owl > > http://www.greenstamp.co.uk/product_info.php/cPath/33/products_id/68?gclid=COmqvdzclZoCFR4hnAodx3XzNw This works because the conductors come into the meter separately. It has the same issues as all clamp meters. S.