The Collaborative International Dictionary of English v.0.48:
Nonconducting \Non`con*duct"ing\, a. Not conducting; nonconductive; not transmitting a fluid or force; -- used especially of electric current; thus, in electricity, wax is a nonconducting substance. [1913 Webster +PJC]WordNet (r) 3.0 (2006):
nonconducting adj 1: not able to conduct heat or electricity or sound [syn: nonconductive, nonconducting, non-conducting] [ant: conductive]