Iam pulling #14 stranded with 600 volt insulation into a wire way thats being used by the control contractor.His wires are 18/2 sheilded cable with 300v insulation carrying 24v ac.My conductors are also carrying 24v ac.The control guy say's I can not use his wire way becouse of the different insulation value. If we are carrying the same voltage I do not see why use it!