Edwards Signaling FireShield Single-Zone Panel - Manual (Page 6)

P/N: 3100589 REV: 1.0 04MAR03 Installation Sheet
6 / 6 FireShield Single-Zone Panel - Installation and Operating Instructions
Notification appliance circuit maximum wire
length calculation
Use this worksheet to determine the maximum wire length of a
notification appliance circuit.
Wire length matrix
Wire lengths in the following table are based on a voltage drop
of 1.9 volts or 10% of the total load at the end of the line.
Maximum wire length
Current
required 18 AWG 16 AWG 14 AWG 12 AWG
0.25 584 950 1460 2170
0.50 292 474 730 1084
0.75 194 316 486 722
1.00 146 236 364 542
Maximum signal loss allowed [1] V
× 1000
Wire resistance per 1000 ft/pair [2] ÷ Ω
Total operating current required [3] ÷ A
Maximum circuit length ft
Notes
[1] 1.9 V max. voltage drop
[2] Use 3.5 Ω for 12 AWG and 2.5 sq mm wire, 5.2 Ω for 14
AWG and 1.5 sq mm wire, 8.0 Ω for 16 AWG and 1.0 sq
mm wire, and 13.0 Ω for 18 AWG and 0.75 sq mm wire
[3] Use the 20 Vfwr Average Operating Current ratings found
on the installation or catalog sheet of each device
Preventive maintenance
Before commencing testing, notify all areas where the alarm
sounds and off-premises locations that receive alarm and
trouble transmissions that testing is in progress.
• Records of all testing and maintenance shall be kept as
required by the authority having jurisdiction.
• Required tools:
-Slotted screwdriver, insulated
-Digital multimeter
-1.1 k
Ω , 1 W resistor
-12 in (30.5 cm) jumper lead with alligator clips
-Panel door key
-Sound level meter
• A complete check of installed field wiring and devices
should be made at regular intervals in accordance with
NFPA 72, Canadian Electrical Code Part I, ULC S524, and
S536 requirements. This includes testing all alarm
initiating devices and circuits and any off-premises
connections.
• Panel operation should be verified in the alarm and trouble
modes.
• To ensure that the panel can be powered when primary
power is lost, the batteries should be periodically
inspected, tested, and replaced (at a minimum) every four
years.
Preventive maintenance schedule
Refer to NFPA 72, Chapter 7 Inspection, Testing, and
Maintenance, Canadian Electrical Code Part I, ULC S524, or
ULC S536 for more information on required inspection and
testing methods and frequency of fire alarm systems and
devices. For detector sensitivity and functionality testing, refer
to the detector manufacturer's installation instructions.
Canadian tests for grounds, opens, and shorts
ULC requires that you test ground fault, open circuit, and short
circuit indications.
For ground fault tests, directly short one leg of the circuit to
chassis ground
. The Ground Fault and Trouble LEDs must
light.
For NAC and IDC open circuit tests, remove the EOL resistor
from the last device on the circuit. The Trouble LED must light.
For NAC short circuit testing, place a short across the NAC
output. The trouble LED must light.
For AUX power short circuit testing, place a short across the
+24 V and -24 V at the panel. The trouble LED must light.
Contact information
Phone: (941) 739-4200