How far does a heat detector need to be from a sprinkler head?
2′
A heat detector is required to be installed within 2′ of any sprinkler head associated with shutting down the power to an elevator (NFPA 72 2016 ed.
What is the minimum distance between sprinklers?
The minimum distance a sprinkler can be installed below a ceiling is 1 inch. The maximum spacing between two sprinklers is determined by the rating on the sprinkler head (usually 15 feet, but there are other spacing distances, depending on the manufacturer). The minimum spacing between two sprinklers is 6 feet.
What is the maximum distance between heat detectors?
Heat detectors also have similar spacing requirements but these are different to smoke detectors. According to BS 5839, for any general area the spacing between any point in a protected area and the detector nearest to that point should not exceed 7.5m for smoke detectors and 5.3m for heat detectors (fig 4).
What should be the distance between two smoke detectors?
In compliance with the National Fire Protection Association (NFPA), smoke alarms will cover a radius of 21 feet, and an area of coverage of 1,385 square feet. The maximum distance between two smoke alarms should be 30 feet. If a hallway is greater than 30 feet, a smoke alarm must be installed at each end.
What could activate a heat detector?
Heat detectors are activated by either melting a fusible material, changes in electrical current induced by heat loads on bimetallic metals, destruction of the device itself by the heat, or by sensing a rate of ambient temperature rise.
What would activate a heat detector?
If there is a fire in the vicinity of the alarm, the convected thermal energy from the flame raises the temperature of a heat-sensitive element in the heat detector. Once this occurs, the element triggers an alarm which then sounds, alerting anyone within ear-shot of the device.
Is it a legal requirement to have a heat detector?
There should be at least one smoke alarm on every storey. In addition, the Building Regulations also require a heat alarm to be installed in any kitchen areas where the kitchen is not separated from the circulation space or stairway by a door.
