General Wiring Guidelines
• Use only copper conductors for all wiring applications. All equipment must be installed in accordance with the manufacturer's
recommendations and the specifications and standards of the authority having jurisdiction (AHJ). The installation of all wiring, cable, and
equipment must be in accordance with NFPA 70 and the National Electrical Code (NEC), specifically Article 760 (Fire Alarm Systems), Article 800
(Communications Circuits).
• If applicable, the installation must be in accordance with the Canadian Building Code, and any provincial and/or local requirements.
• Each TrueAlert channel is limited to 0.60uF maximum capacitance. This includes conductor to conductor and conductor to shield capacitance
(if shield wire is used).
• TPS wiring must use ferrite beads in order to comply with the RF Immunity test specified in UL864.
• If shielded wire is used, the following must be observed.
- Metallic continuity of the shield must be maintained and insulated throughout the entire length of the cable.
- The entire length of the cable must have a resistance greater than 1 Mega ohm to Earth.
• Underground wiring must be free of all water.
• Wiring other than that connected to elevator cabs must not be run in elevator shafts (reference NFPA 70, Article 620).
• Wiring in ducts, plenums, and other air handling spaces must be installed in accordance with NFPA 70, Article 300.
• Splicing is permitted in accordance with NFPA 70. All junctions must be insulated as soundly as the original jacket. Continuity of shields (where
used) must be maintained.
• A system ground must be provided for Earth detection and lightning protection devices. This connection shall be made to an approved,
dedicated Earth connection, per NFPA 70, Article 250.
• Only system wiring can be run in the same conduit.
• Field wiring circuits shall not leave the building of origin unless all of the following conditions are met.
- Circuits are protected from lightning by utilization of either the Model 2081-9044 or the Model 2081-9028 listed isolated loop circuit
protectors.
- One isolated loop circuit protector is inserted into the circuit where the wiring leaves the building. A second isolated loop circuit protector is
inserted into the circuit where the wiring enters the next building.
- Underground wiring circuits are run in a parallel wiring trough separate from any commercial power distribution wiring.
- Overhead circuit wiring is run in parallel with relation to the commercial power distribution wiring. Overhead circuit wiring is separated from
the commercial power distribution wiring by a minimum distance equal to the maximum span between two adjacent poles of either the
system's circuit or the commercial power distribution circuit, or 100 feet (30 m), whichever is greater. Outside plant wiring is limited to one
contiguous property and the total wire length may not exceed 3,270 feet (997 m).
Power-Limited/Non-Power Limited Wiring Guidelines
Adhere to these guidelines when wiring power limited and non-power limited wiring within the FACP.
• Non-power limited field wiring (AC power, batteries) must be installed and routed in the shaded areas shown in the figure below.
• Power-limited field wiring must be installed and routed in the non-shaded areas shown in the figure below.
• Excess slack should be kept to a minimum inside the back box enclosure. The wiring should be neatly dressed and bundled together using the
wire ties provided with the equipment. Anchor power-limited wiring to tie points, as shown in the figure below.
• Tie the wiring located between bays to the internal wiring troughs, if applicable.
• When powering remote units or switching power through relay contacts, power for these circuits must be provided by a power-limited power
supply that is UL listed for fire-protective signaling use. A UL listed EOL relay must be used to supervise the auxiliary power circuit.
Important: If the TPS is powered up with zero devices connected, the TPS indicates channel failure for those channels that are programmed to
support devices. The TPS does not sense devices as they are connected when the TPS has been powered up with zero devices connected. After at
least one valid device is connected, the unit must be reset by toggling the DIP Switch SW1-1 OFF and then ON. The TPS then communicates with
devices as they are added.
page 10 579-336 Rev. M
4100-5120, 4100-5121, 4100-5122 TrueAlert Power Supply Installation Instructions
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