Can I run copper OSP cable inside a building?

February 4, 2020

Can I run copper OSP cable inside a building?

Outside plant cables are not rated for UL CMR or CMP listing and when used inside buildings the National Electrical Code* requires the cable be placed inside metal conduit (NEC article 800-50, exception 2). In addition to NEC regulations, special state, county and local building/fire codes may apply when engineering projects utilizing this type of cable.

The NEC allows OSP cable to be extended from the outside a maximum of 50 feet to allow a termination to be made.

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Can I run copper OSP cable inside a building?