Beyond the General Duty Clause, 29 CFR 1910 contains the general industry standards that cover most fusion splicing hazards: personal protective equipment (Subpart I), air contaminants (Subpart Z), flammable liquid storage (Subpart H), respiratory protection, hazard. Beyond the General Duty Clause, 29 CFR 1910 contains the general industry standards that cover most fusion splicing hazards: personal protective equipment (Subpart I), air contaminants (Subpart Z), flammable liquid storage (Subpart H), respiratory protection, hazard. Fiber optic joints or terminations are made two ways: 1) splices which create a permanent joint between the two fibers or 2) connectors that mate two fibers to create a temporary joint and/or connect the fiber to a piece of network gear. Either joining method must have three primary characteristics. Operators that are familiar with electronic components and wiring may not be aware of the special needs of optical fibers and fiber optical rotary joints (FORJs). As most optical fibers consist of glass, which is known to be brittle, proper handling of optical fibers is required to prevent fiber. Understanding the sources of splice loss is essential for building reliable fiber optic networks. Both intrinsic and extrinsic factors contribute to splicing loss, and each requires careful management. Core mismatch occurs when the core diameters or numerical apertures of two fibers differ. This. Recommendation ITU-T L.