Which type of cable is permitted to be used as a substitute for OFCR?

The type of cable permitted to be used as a substitute for OFCR (Optical Fiber Central Loose Tube Riser) is OFCP (Optical Fiber Central Loose Tube Plenum). Both OFCR and OFCP cables are designed for specific applications involving fiber optic communication, with their main distinction lying in their installation environments.

OFCR cables are rated for vertical spaces, specifically risers, while OFCP cables are rated for plenum spaces, which are areas used for air circulation in heating and air conditioning systems. Since OFCP is designed to be more fire-resistant than OFCR, it can effectively be used as a substitute in riser applications where fire-rated materials are essential. Therefore, using OFCP in place of OFCR meets safety standards while providing the necessary performance in terms of signal transmission.

Other options, like BLX, CMR, and Conductive Cable, do not meet the same safety and operational standards as OFCP when it comes to substituting for OFCR. Different cable types and ratings have specific intended uses to ensure safe and efficient operation in their designated environments.