Peter,
What if it is RMC? not PVC, the megger will find faults, where an ohmmeter will not, it's breakdown your looking for not continuity when testing for insulation.
One handy piece of equipment to have, is a megger, with AFCI's and GFCI.s in branch circuits, the megger sure helps find circuit problems that cause these devices to trip.
[This message has been edited by LK (edited 08-26-2005).]
