Stromag Engineers Ltd. Offers Jointless Monoconductor Bar System. Stromag Engineers Ltd. Also manufactures Single pole individually insulated conductors, single pole PVC housing, tepeofrm copper conductor, multi conductor, pvc hosing Jointless Monoconductor Bar System is a single PVC housing that is common for any Copper Conductor. The Jointless Monoconductor Bar System facilitates the copper conductor to be pulled into previously installed housing. The Jointless Monoconductor Bar System has a current rating of 40 - 140 Amps.