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Often referred to as line type heat detection, LHD is a cable-based type of early fire detection, designed to generate either an alarm, or automatically activate a fire suppression system. The cable itself acts as a heat detector, so when a physical or electronic change occurs, this is identified anywhere along the cable’s entire length (reaching up to 3km).
Oct 22, 2023 · When it comes to choosing the right cable for your water heater, it’s important to consider the type of cable that will best suit your needs. Here are three common types of cables that are typically used for water heaters: NM-B Cable. NM-B cable, also known as non-metallic sheathed cable, is a popular choice for residential water heaters.
Honeywell’s Linear Heat Detection Cable (LHDC) is a continuous heat detector that can detect heat (due to fire or other events) at any point along its entire length. The cable is composed of two twisted-shield conductors, insulated with a heat-sensitive polymer, then wrapped with a protective tape and finished with an outer covering.
Jul 11, 2020 · For example, if the LHD is connected to a fire alarm that initiates the fire sprinkler system upon alarm, when the heat from fire melts the wire, the system is alerted, and the fire sprinkler valves open to allow water to flow in. LHD work with most any type of fire alarm system (wet, dry, etc.).
Feb 7, 2022 · FV Sensors are safety devices on select models of gas water heaters, which cause a soft lockout (a.k.a. the unit shuts down) when flammable vapors are detected near the unit, to prevent the possibility of their ignition; in other words the FV Sensor is a safety feature to avoid the risk of fire.
Dec 10, 2020 · A fire alarm cable is a multi-conductor electronic cable. The variations are PVC, plenum, shielded, and unshielded which automatically puts this cable in at least four types of different applications. Standard ways of asking for it would be fire alarm cable, shielded fire alarm cable, FPLR cable, and FPLP cable which stands for Riser and Plenum.
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The cable consists of heat-sensitive elements that trigger an alarm when a certain temperature threshold is reached or when a rate-of-rise in temperature is detected. This allows for early detection of fire or overheating conditions, making linear heat detection particularly useful in environments where rapid fire detection is crucial, such as tunnels, conveyor belts, cable trays, and storage ...
