General Guidelines; Power-Limited Guidelines - Simplex 4100 Series Installation Instructions Manual

Wiring

General Guidelines

• All wires must be 18 AWG, minimum, twisted/shielded pair.
• The Maximum wiring distance is:
- 18 AWG: 150 ft.
- 16 AWG: 250 ft
- 14 AWG: 400 ft.
- 12 AWG: 625 ft.
• All wiring is supervised.
• Conductors must test free of all grounds.
• All wiring must be done using copper conductors only.
• If shielded wire is used,
- The metallic continuity of the shield must be maintained throughout the entire cable length.
- The entire length of the cable must have a resistance greater than 1 Megohm to earth ground.
• Wires must not be run through elevator shafts.
• A system ground must be provided for earth detection and lightning protection devices. This connection must comply with approved earth
detection per NFPA780.
• Only system wiring can be run together in the same conduit.

Power-Limited Guidelines

• Non-power limited field wiring (AC power, batteries, City connection) must be installed and routed in the shaded areas shown in Figure 12.
• Power-limited field wiring must be installed and routed in the non-shaded areas shown in Figure 12, with the exception of City wiring.
• 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 Figure 12.
• 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 listed for fire-protective signaling use.
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4100/4120-Series VESDA Interface Cards Installation Instructions
Figure 12: Power-Limited Wiring
574-050 Rev. N