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Is CMX required for Outdoor cable?Updated 3 hours ago

No. CMX signifies a UL/cETLus fire rating, specifically denoting Communications, Residential. Communications cable with a CMX fire rating may or may not possess simultaneous outdoor use certification. Typically, cable designated solely for outdoor applications (including direct burial) lacks any fire rating and is referred to as OSP, or Outside Plant cable. The deployment of CMX or OSP communications cable within commercial or residential structures is generally governed by local ordinances. Consultation with your local code inspector is advised to ascertain permissible jacket types for specific installations.

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