What wiring scheme do smoke detectors use?
White wires connect to the harness’s white wire and red wires connect to the harness’s red wires. Only connect wires of like colors. When connecting smoke alarms to each other, the wire harness should connect to both the wires that run from the breaker panel (power source) and the wires that run between both alarms.
How many wires should be connected to an automatic fire detector?
A common wiring pattern for smoke detectors is to run a 2-conductor cable, such as 14/2, from the breaker panel to first smoke detector and then 3-conductor cable from each detector to another onward. The third wire is for tripping all of the detectors should one detect smoke.
What are the three wires on a smoke detector?
If you buy an AC-powered smoke detector today, it will have three wires — black, white and red. Black accepts 120 volts AC, white is neutral, and red is the intercommunication wire.
Are all hardwired smoke detectors compatible?
All modern hardwired First Alert, Onelink, and BRK alarms use the same wiring technology, and can interconnect. It’s also safe to mix and match several types of hardwired detector, like a photoelectric smoke alarm near the kitchen and a heat detector near the garage.
Do duct detectors go on supply or return?
NFPA 90A requires duct detectors to be installed on the supply side of air handler units with airflows of more than 2,000 cubic feet per minute (cfm). The standard also requires a duct detector on the return side of any unit with air flows exceeding 15,000 cfm and which serve more than one floor of a building.
How do you wire multiple smoke detectors?
If multiple smoke detectors are being installed, your electrician will run a 3-wire cable (with ground) from the first smoke detector to each subsequent smoke detector. The extra wire allows the smoke detectors to communicate with one another so that if one smoke detector detects smoke, all detectors will go off.
What is the purpose of the hochiki smoke and heat detector guide?
Introduction This guide is intended to assist you in the selection, placement, installation, and maintenance of Hochiki smoke and heat detectors. It is your responsibility to be familiar with and comply with all applicable local and national codes and requirements, including those of the AHJ.
Where can I find additional information about hochiki detectors?
Please see the applicable Hochiki Technical Bulletin for additional details about Hochiki detectors, including compatible bases, specifications, cleaning, and testing procedures. Technical bulletins can be obtained at www.hochiki.com.
What are the regulations for multi-criteria smoke detectors?
If a CO multi-criteria detector is being used for fire detection you must follow NFPA 72 location and installation rules for smoke detectors with 30 foot spacing. It is also recommended that you confirm if any local mounting requirements for CO detectors exist.
Do you supply hochiki products?
We can supply a wide range of Hochiki Smoke Detectors, Hochiki spare parts and other Hochiki equipment such as Heat Detectors and Multisensors worldwide. Due to our worldwide network and large stock, we are able to deliver the equipment in a short period of time against competitive prices.