Conventional Products—B110LP Plug-In Conventional Low Profile Detector Base 7
All wiring must be installed in compliance with the National Electrical
Code (NEC), all applicable local codes, and any special requirements of
the authority having jurisdiction, using the proper wire size. The
conductors used to connect smoke detectors to control panels and
accessory devices should be color-coded to reduce the likelihood of wiring
errors. Improper connections can prevent a system from responding
properly in the event of a fire.
For Initiating Device Circuit (IDC) wiring (the wiring between
interconnected detectors and the fire alarm control panel), it is
recommended that the wire be no smaller than No. 18 American Wire
Gauge (AWG) (1.0 square mm). Wire sizes up to No. 14 AWG
(2.1 square mm) for Terminals 8-14 and No. 12 AWG (3.3 square mm)
for Terminals 1-5 may be used with the base. For best system
performance, the IDC wires should be a twisted pair and installed in a
separate grounded conduit to protect the IDC from other types of circuits
in the system.
Smoke detectors and alarm system control panels have specifications for
the maximum allowable IDC resistance and supervision current. Consult
the control panel manufacturer’s specifications for the total IDC resistance
and supervisory current allowed.
The IDC zone wiring of the detector base should be checked before the
detector heads are installed in them. To make this possible, this base
contains a special spring-type shorting jumper. After a detector base is
properly wired and mounted on an electrical box, make sure that the
jumper spring is in contact with the base of Terminal 3. This temporary
connection shorts the negative-in and negative-out leads and permits the
wiring of the IDC to be checked for continuity.
Once all the detector bases have been wired and mounted and the IDC,
power, and optional releasing device control wiring has been checked, the
detector heads may be installed in the bases. The shorting spring in the
base will disengage when the detector head is turned into place.
Wiring
Installation
Guidelines
