MPR is an abbreviation for multi-purpose riser cable, a communication cable rated for vertical riser runs between floors, with fire performance that limits flame spread.
MPR designates multi-purpose riser cable, a communication cable class rated for use in riser applications, the vertical pathways that run between floors of a building. Riser-rated cable is built to limit the spread of flame from floor to floor, a higher level of fire performance than general purpose cable but below the most stringent plenum requirements.
Because vertical riser shafts can act as channels for fire to travel between floors, cable installed in them must resist propagating flame along its length. The MPR rating reflects this requirement, making riser cable appropriate for the between-floor runs that connect a building's communication systems.
In commercial and industrial facilities, multi-purpose riser cable supports communication and signal applications in vertical pathways where flame-spread performance is required. Selecting riser-rated cable for these runs is part of meeting safety requirements and building a compliant low-voltage system.
Because a riser shaft can act as a chimney for fire, the flame-spread performance behind the riser rating is essential, making multi-purpose riser cable the appropriate choice for the vertical, between-floor runs that connect a building's communication systems.
At Windy City Wire, the focus on low-voltage communication cable includes riser-rated classes like multi-purpose riser cable. Supplying cable with the appropriate fire ratings helps commercial facilities apply the right product for between-floor runs and other locations requiring riser performance.
MPR (Multi-Purpose Riser cable)
NEC (National Electrical Code), which defines riser cable fire performance requirements