Simplex 4100-5120, Руководство по установке

Страница: 21 / 24

21
For Class B wiring with isolators, T-Tapping is allowed. SLC wiring may be split multiple times to
form SLC wire branches. Maximum wire distance of each of these SLC branches from panel to any
device is the smaller of the values obtained from Table 8 and the Equation 1 shown below. Add the
alarm loads of all the devices on an SLC wire branch and apply to Equation 1. Add the unit loads
(see Table 4 for unit loads) for all devices on an SLC wire branch and the number of isolators and
apply to Table 8. Use of Table 8 requires that all SLC wire branches join within 10 feet (3 m) of
the panel. T-tap wire stubs are allowed on the SLC wire branches, but each tap must be less than
100 feet (30 m).
Equation 1: Maximum SLC Wire Branch Length Based on Appliance Alarm Current Load
Feet = 10 + (2V – (2.5A * 10 * 2 * (res/ft) * 0.1(#isolators)(branch alarm amps)
2 * (res/ft) * (branch alarm amps)
FigureTag FD9-336-06
TO OTHER
DEVICES
APPLIANCE
TO OTHER
DEVICES
TO OTHER
DEVICES
TO OTHER
DEVICES
PORT
1
4905-9929
ISOLATOR
PORT
2
PORT
1
4905-9929
ISOLATOR
PORT
2
PORT
1
4905-9929
ISOLATOR
PORT
2
PORT
1
4905-9929
ISOLATOR
PORT
2
APPLIANCE APPLIANCE APPLIANCE APPLIANCE
Ferrite
Bead
Figure 9. Class B Wiring, with Isolators
Wiring Class B Circuits,
Continued
Class B
Wiring Diagram
(With Isolators)
firealarmresources.com