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A decision was made to harmonize cable markings throughout North America. The new standard was issued in June, 1994 and all communication cables must be designated with the new coding by June 1, 1995.
The table below relates the new markings and their application versus the previous designations.
| NEW MARKINGS (per UL & CSA) |
PREVIOUS MARKINGS (per CSA) |
|---|---|
| MPP (Multipurpose Plenum) | |
| CMP (Communications Plenum) | |
| MPG (Multipurpose General) | |
| CMG (Communications General) | |
| CMH (Communications) |
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