Which type of wire is NOT allowed as a substitution for Power Limited Fire Alarm Riser (FPLR)?

Power Limited Fire Alarm Riser (FPLR) wire is specifically designed to meet stringent fire safety requirements, including resistance to fire spread and the ability to maintain circuit integrity during a fire event. Therefore, appropriate wire options for substituting FPLR must adhere to these standards.

Copper electrical wire, although it is commonly used in various electrical applications, does not possess the specific fire-resistive properties mandated for FPLR use. Unlike FPLR, which is engineered to minimize the risk of fire propagation, standard copper electrical wire lacks these critical features and is not suitable as a replacement. Thus, the emphasis is placed on using wire types that are specifically rated and tested for fire alarm systems to ensure compliance with NFPA 72 and to promote safety in fire detection and signaling installations.

In contrast, Power Limited Fire Alarm (FPL) wire is specifically rated for fire alarm systems and could potentially be allowed in some contexts, while Communication Rated Wire might also hold appropriate characteristics for specific applications related to signaling. Therefore, identifying wire that does not meet the necessary fire safety standards, such as copper electrical wire, is crucial for maintaining system integrity and safety.