Texas Fire Alarm License Practice Test

Which type of plenum cable can be substituted according to regulations?

1. Power Limited Fire Alarm Plenum (F.P.L.P)

2. Power Limited fire alarm riser (F.P.L.R)

3. General purpose cable

4. None allowed

The correct answer is: Power Limited Fire Alarm Plenum (F.P.L.P)

The correct answer is Power Limited Fire Alarm Plenum (F.P.L.P) cable. This type of cable is specifically designed for use in plenum spaces, which are areas used for air circulation in heating and air conditioning systems. F.P.L.P cables are constructed with fire-resistant materials that meet the stringent safety and performance requirements set forth in the National Electrical Code (NEC). Substituting F.P.L.P cable in plenum areas is permissible because it is engineered to reduce the risk of fire and smoke spread should a fire occur. This is crucial because plenum spaces can serve as pathways for smoke and toxic gases. In contrast, while Power Limited Fire Alarm Riser (F.P.L.R) cables are designed for vertical riser applications, they are not suitable for plenum spaces due to their construction. General-purpose cables, although more versatile for various applications, do not meet the necessary fire safety standards for use in plenum areas. Therefore, only F.P.L.P cables are compliant to be substituted in such locations while adhering to safety regulations.