U.L. Alarm Bell
This wiring is required for Commercial burglar
installations. Double strap grounding is required
as shown in Figure 2-18.
SYSTEM 8300 ENCLOSURE
DOUBLE ISOLATED ALARM BOX
Earth
Ground
1000 ohm
E.O.L. Resistor
I-
Figure 2-18 UL Bell Wiring
AT&T Security System 8300 Install&s Manual
2-25
