CMR on NEC / UL (USA)-järjestelmän kaapelin tyyppimerkintä: C = Communications cable; M = Multipurpose rating (reading by usage, UNVERIFIED); R = Riser; CMR = Communications cable, riser rated (vertical shafts, UL 1666). 300 V, 75 C. UL 444; NEC 800.179(B).