The JD-1 is a junction box accessory used in Protectowire linear heat detection (LHD) installations. It provides a clean transition and connection point where the continuous Protectowire heat-sensing cable terminates, splices, or routes into conduit, end-of-line hardware, or control wiring. Using a dedicated junction box keeps field connections accessible for inspection and maintenance while protecting them from mechanical damage and environmental exposure along the detector run.

Compliance

• For use within UL 521 listed Protectowire linear heat detection systems
• Supports installations designed to FM 3210 approval requirements
• Intended for application under NFPA 72 design and inspection practices

Key features

• Provides an accessible enclosure for cable terminations and transitions
• Protects field connections from dust, moisture, and mechanical impact
• Maintains continuity of the heat-sensing cable circuit at junction points
• Supports conduit entry and end-of-line device mounting
• Keeps connections serviceable for periodic testing and re-inspection
• Suited to industrial environments where the LHD cable changes direction or transitions

Protectowire linear heat detection systems run a continuous sensor cable across long or distributed hazards such as tunnels, conveyor belts, storage racks, and cable trays, where spot detectors cannot provide unbroken coverage. Junction accessories like the JD-1 hold those long cable runs together at transition points and keep the circuit intact end to end.

Verify panel and device family compatibility before ordering.