NEC 800
Cable Jacket Ratings Explained: CMP, CMR, CMG, CM, CMX, LSZH and Direct Burial, Where Each Is Allowed by NEC 800.113 and Article 725
What each communications and low-voltage cable jacket rating means, the flame test behind it, the substitution hierarchy that lets a higher rating replace a lower one, and a room-by-room table of which rating the NEC requires for Cat6, coax, thermostat and speaker cable.
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