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UL 1651 Standard for Optical Fiber Cable Updated

optical fiber cable photo

UL has released a new edition of UL 1651, which applies to optical fiber cables. The 4th edition can be purchased form the UL website.

Description*

- Partner Content -

A Dash of Maxwell’s: A Maxwell’s Equations Primer – Part Two

Maxwell’s Equations are eloquently simple yet excruciatingly complex. Their first statement by James Clerk Maxwell in 1864 heralded the beginning of the age of radio and, one could argue, the age of modern electronics.

“These requirements cover single and multiple optical-fiber cables for control, signaling, and communications as described in Article 770 and other applicable parts of the National Electrical Code (NEC). Cables complying with these requirements are:Type OFNP – Plenum – A nonconductive cable for use in ducts, plenums, and other spaces used for environmental air. A nonconductive cable contains no metallic members and no other electrically conductive materials.Type OFCP – Plenum – A conductive cable for use in ducts, plenums, and other spaces used for environmental air. A conductive cable contains non-current-carrying conductive members such as metal strength members and metallic vapor barriers.Type OFNR – Riser – A nonconductive cable for vertical use in shafts or from floor to floor.Type OFCR – Riser – A conductive cable for vertical use in shafts or from floor to floor.Type OFN and OFNG – General Purpose – Nonconductive cables for general purpose use.Type OFC and OFCG – General Purpose – Conductive cables for general purpose use.”

*Description from the UL website.

Photo by Global Marine Photos

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