I have a vendor device that has ONE conduit hub for the following circuits: 120VAC power, 24VDC discreet signal (customer supplied cable) and 1900VDC (vendor supplied cable) through the same conduit into the vendor supplied enclosure. The vendor supplied cable is insulated at 1900VDC/600VAC. The other two cables are customer supplied, insulated at 600VAC. All cables are functionally associated, but is this a violation of 725.48(A)? Or does 110.3B permit this since its a vendor design and listed device?