Plenum OFNP Rated 24 Fiber MPO MTP Trunk Cable for Riser Shaft Cabling

Plenum OFNP Rated 24 Fiber MPO MTP Trunk Cable for Riser Shaft Cabling

North American building codes treat a riser shaft and an air handling plenum as paths where a burning jacket cannot be tolerated, so a riser run needs a plenum OFNP rated MPO MTP trunk cable rather than a general purpose LSZH assembly. This 24 fiber trunk uses a plenum grade flame retardant jacket that passes the UL 910 Steiner tunnel test, producing limited smoke and no burning droplets while routing 24 fibers between floors. The OM4 ribbon inside supports 40G and 100G parallel optics, which means one plenum MPO MTP trunk cable replaces up to twelve duplex runs and cuts the fill inside a crowded shaft. Assemblies are built to the ordered polarity with a numbered label on both ends, and every unit ships with an insertion loss and return loss record.

Technical Specifications

Application Fit and Advantage Points

• Riser shafts between floors — a plenum OFNP rated MPO MTP trunk cable satisfies the inspection requirement that a general purpose jacket fails.
• Air handling plenum ceilings — limited smoke generation keeps egress paths clear in the event of a fire, which is what the AHJ inspects.
• Dense vertical backbone — 24 fibers in one 3.0 mm jacket replace twelve duplex cords, freeing tray capacity for later growth.
• North American tender compliance — the plenum jacket is listed to UL 910, so the submittal package clears code review without a substitution request.
• Fast floor by floor rollout — pre terminated ends with numbered labels let an installer pull the trunk and land both ends the same morning.

Buyer Questions on This Specification

Manufacturing and Quality Control

A plenum build is a documentation exercise as much as an assembly job: the jacket lot number, UL listing reference and test data are filed against the serial number of every plenum MPO MTP trunk cable we ship. Our team has supplied trunk and cassette systems into North American and European enterprise rollouts since 2011, and inspectors receive the plenum certificate, the insertion loss sheet and the polarity drawing in one package. Custom leg lengths and breakout tails are confirmed on a drawing before the ribbon is terminated.

Assembly drawings, insertion loss records and end face images are available before shipment. Custom fiber counts, leg lengths, polarity and jacket colours are confirmed in writing before production.