BS 7629 – 1, 300 / 500 V fire resistant electric cables with non corrosive gases and low emission of smoke when affected by fire. Category STANDARD 30 & STANDARD 60 when tested in accordance with BS EN 50200-Method of test for resistance to fire of unprotected small cables for use in emergency circuits.
How many types of fire alarm cables are there?
Fire alarm cables are placed into three broad categories : plenum, non-plenum, and riser. Each of these corresponds to another standardized category, and these terms reflect where the fire alarm cable can be installed safely. Plenum cable, to be used in ducts or other enclosed air spaces, is called FPLP.
Which type of cable is used for fire alarm system?
1) FPL which is a power-limited fire alarm riser cable is usually the least expensive because it is the most basic type of fire alarm cable and is also recognized by the NEC (National Electric Code). FPLR cables are suitable for use in a vertical run through a shaft or from floor to floor within a building.
What type of wire is used for alarm systems?
The recommend gauge wire for alarm components is solid or stranded 22 AWG, 2 conductor wire (black and red) or 22 AWG, 4 conductor wire ( black, red, green and yellow or white). Solid copper wire does not bend as easily as stranded wire, but eliminates the chance of a loose strand of wire causing a short.
What size cable do I need for a fire alarm?
Smoke Detectors and Fire Wire
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 is difference between FR and FRLS cable?
Heat resistant – will operate as normal at high temperatures, but may not operate as normal in the event of a fire. Fire resistant – can operate as normal within fire conditions. Flame retardant – will not operate as normal within fire conditions, but will actively prevent the fire from spreading.
What is FRLS cable?
FRLS cables are manufactured by using electrolytic grade copper to ensure superior conductivity. Insulated with an FRLS PVC compound, FRLS has special flame retardant and low smoke emitting properties.
Is fire alarm cable required to be in conduit?
According to the National Fire Protection Association (NFPA) regulations and National Electric Code (NEC) articles, any wiring that exists in non-accessible areas or below seven feet must be installed in metallic conduit .
What is shielded fire alarm cable?
FPLR shielded fire alarm cables include an aluminum polyester foil shield over the conductors to protect against electromagnetic interference (EMI) . A foil shield is the only type of shield offered in standard riser alarm cables. ... This additional EMI protection will cost a little more than its unshielded counterpart.
On what principle do smoke detectors work?
How they work: Ionization -type smoke alarms have a small amount of radioactive material between two electrically charged plates, which ionizes the air and causes current to flow between the plates. When smoke enters the chamber, it disrupts the flow of ions, thus reducing the flow of current and activating the alarm.
What is wire alarm system?
As the name suggests, wired alarm systems are hardwired into your building and communicate through attached wires . Every sensor is physically connected to the control panel, and in monitored systems, the control panel typically communicates with the outside monitoring service via landline.
What type of cable is used for a keypad?
The following cable types may be used for wiring the Control4® keypad bus: Control system cable, such as Belden 1502R or 1502P or Liberty Cable LLINX-U , that utilizes one 18-gauge pair for power and one 22- or 24-gauge twisted pair for data. NOTE: The use of CAT5e or CAT6 cable for bus wiring is no longer recommended.
Can you use 12 2 wire smoke alarm?
A 12-2 NMB with ground wire will need to be run from your electrical panel to the first smoke detector. ... Any red wires should be connected to the interconnect wire with the smoke detector, which is usually a yellow wire and should be listed in the manufacturer's manual.
Can you join fire alarm cable?
Did you know you can't connect a fire alarm to just any kind of wiring? Fire alarm cabling needs to be compliant with British Standards ; otherwise if something happens within the cabling it could create a fault in the fire alarm.
What is LSF material?
LSF cables, in the case of data, signal and control cables, are made from a modified version of PVC and can still give off large amounts of black smoke and hydrogen chloride gas when burned. ... LSHF cables are those that, when exposed to fire, emit no more than 0.5% hydrogen chloride.
