Fire-Rated Three-Way Splice (FTS) System

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Tunnel lighting systems need a fully approved fire-rated three-way splice (FTS) system

Emergency lighting systems within road and rail tunnels must remain functional during a fire event as per the requirements of NFPA 130 and 502 standards. The FTS system protects the primary main power line leading to and from the fire zone, and due to its fused design, will not be interrupted with a failure in a single light branch circuit.

FTS Splice System

The FTS splice system protects the primary main power line leading to and from the fire zone. Should a single light be consumed by fire, it’s branch line’s dedicated fuse within the FTS box would blow, but the remaining branch line and main power line would remain intact and continue to operate.

The FTS system is offered primarily as a custom pre-assembled system with pre-terminated cables
for both the main power and branch circuits. If installers would prefer to terminate the cables on site, FTS termination kits can be purchased separately.

The pre-assembled system option is designed to optimize the installation time and minimize both labor costs and tunnel down time during system installation.

For more information please download the FTS product sheet below.

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