Some embodiments are directed to a lockdown apparatus for facilitating initiation of lockdown procedures at a facility that includes multiple doors and is configured for occupation by facility occupants. A lockdown actuator is disposed at the facility and configured to initiate transmission of a lockdown initiation signal upon being actuated, the lockdown actuator being configured to be recognizably distinguishable from the fire alarm actuator. A lockdown communicator is configured to produce a lockdown initiation communication for communicating initiation of lockdown procedures to the facility occupants and individuals not disposed proximate the facility upon transmission of the lockdown initiation signal, the lockdown initiation communication being recognizably distinguishable from the fire alarm communication. A display is configured to indicate status of each of the multiple doors of the facility upon transmission of the lockdown initiation signal, the status including at least one of open versus closed, and locked versus unlocked.

Some embodiments are directed to a lockdown apparatus for facilitating initiation of lockdown procedures at a facility that includes multiple doors and is configured for occupation by facility occupants. A lockdown actuator is disposed at the facility and configured to initiate transmission of a lockdown initiation signal upon being actuated, the lockdown actuator being configured to be recognizably distinguishable from the fire alarm actuator. A lockdown communicator is configured to produce a lockdown initiation communication for communicating initiation of lockdown procedures to the facility occupants and individuals not disposed proximate the facility upon transmission of the lockdown initiation signal, the lockdown initiation communication being recognizably distinguishable from the fire alarm communication. A display is configured to indicate status of each of the multiple doors of the facility upon transmission of the lockdown initiation signal, the status including at least one of open versus closed, and locked versus unlocked.

A manual call point for a fire alarm system, the manual call point includes: an operating element 18, wherein a physical movement of the operating element 18 will trigger an alarm condition of the manual call point; at least two switch devices 12, 14, 16. Each switch device 12, 14, 16 is arranged to complete or break a circuit in response to the physical movement of the operating element 18. At least one of the switch devices 12, 14, 16 is a contactless device 12, 14 and the corresponding circuit includes an electromagnetic circuit that is completed or broken without mechanical contact from the operating element 18.

A manual call point for a fire alarm system, the manual call point includes: an operating element 18, wherein a physical movement of the operating element 18 will trigger an alarm condition of the manual call point; at least two switch devices 12, 14, 16. Each switch device 12, 14, 16 is arranged to complete or break a circuit in response to the physical movement of the operating element 18. At least one of the switch devices 12, 14, 16 is a contactless device 12, 14 and the corresponding circuit includes an electromagnetic circuit that is completed or broken without mechanical contact from the operating element 18.

An automatic stovetop fire suppressor with suppressor activation triggering an audible alert of a fire condition and method are provided herein. A plastic bottom lid is secured to a bottom of a can, forming a closed container. A fire suppressing agent and a sound board are housed within the closed container. As the fire suppressor actuator is triggered, the bottom lid lowers releasing the fire suppressing agent and tripping a sound board alert switch. A microcontroller generates a desired fire condition signal which is played across a low voltage magnetic transducer. The suppressor is user friendly, provides an automated release of fire suppressing agent in the presence of a stovetop fire, and emits a continuing audible alert signal until a user disables the same. The fire suppressing agent and battery powered sound board are stored in the closed from manufactured end to activation of the suppressor in a fire condition.

A multi-core cable includes a heat detection line including a twisted pair wire composed of a pair of heat detecting wires being twisted together, each of which includes a first conductor and a first insulator covering a periphery of the first conductor, a plurality of electric wires spirally twisted around the heat detection line, each of which includes a second conductor and a second insulator covering a periphery of the second conductor, and a sheath covering the heat detection line and the plurality of electric wires together. A melting point of the first insulator is lower than a melting point of the second insulator. The second conductor has a shape in a cross-section perpendicular to a cable longitudinal direction in which a width along a circumferential direction is gradually increased from a radially inward portion to a radially outward portion.

A multi-core cable includes a heat detection line including a twisted pair wire composed of a pair of heat detecting wires being twisted together, each of which includes a first conductor and a first insulator covering a periphery of the first conductor, a plurality of electric wires spirally twisted around the heat detection line, each of which includes a second conductor and a second insulator covering a periphery of the second conductor, and a sheath covering the heat detection line and the plurality of electric wires together. A melting point of the first insulator is lower than a melting point of the second insulator. The second conductor has a shape in a cross-section perpendicular to a cable longitudinal direction in which a width along a circumferential direction is gradually increased from a radially inward portion to a radially outward portion.

A multi-core cable includes a heat detection line including a twisted pair wire composed of a pair of heat detecting wires being twisted together, each of which includes a first conductor and a first insulator covering a periphery of the first conductor, a plurality of electric wires spirally twisted around the heat detection line, each of which includes a second conductor and a second insulator covering a periphery of the second conductor, and a sheath covering the heat detection line and the plurality of electric wires together. A melting point of the first insulator is lower than a melting point of the second insulator. The second conductor has a shape in a cross-section perpendicular to a cable longitudinal direction in which a width along a circumferential direction is gradually increased from a radially inward portion to a radially outward portion.

A multi-core cable includes a heat detection line including a twisted pair wire composed of a pair of heat detecting wires being twisted together, each of which includes a first conductor and a first insulator covering a periphery of the first conductor, a plurality of electric wires spirally twisted around the heat detection line, each of which includes a second conductor and a second insulator covering a periphery of the second conductor, and a sheath covering the heat detection line and the plurality of electric wires together. A melting point of the first insulator is lower than a melting point of the second insulator. The second conductor has a shape in a cross-section perpendicular to a cable longitudinal direction in which a width along a circumferential direction is gradually increased from a radially inward portion to a radially outward portion.

Aspects of the present disclosure provide non-addressable detection and alarm systems and methods for controlling a combined circuit by a control panel. In an example, a combined circuit may include paired wires, one or more initiating devices, and one or more notification appliances communicatively coupled with the paired wires in parallel. The control panel may monitor the one or more initiating devices in a standby mode while maintaining the one or more notification appliances in an off state. When the control panel detects an anomaly from one or more initiating devices, the control panel may switch the combined circuit to an alarm mode. In the alarm mode, the control panel may activate the one or more notification appliances and maintain the one or more initiating devices in an off state.