8 en | Installation
2016.07 | 04 | F.01U.291.483 UL Installation Guide Bosch Security Systens, Inc.
2.5 Connecting Earth Ground
2.5.1 Terminal 10
To help prevent damage from electrostatic charges or other transient electrical surges,
connect the system to earth ground at Terminal 10 before making other connections.
Recommended earth ground references are a grounding rod or a cold water pipe.
Warning!
Do not use telephone or electrical ground for the earth ground connection. Use 14 AWG (1.8
mm) to 16 AWG (1.5 mm) wire when making the connection. Do not connect other control
panel terminals to earth ground.
2.5.2 Ground Fault Detect Enable
Notice!
To meet UL 864 requirements, enable Ground Fault Detect.
A ground fault is a circuit impedance to earth ground. The control panel has a ground fault
detection circuit that, when enabled, detects ground faults on Terminals 1 to 9 and 11 to 36.
The control panel also detects and annunciates ground faults on any device connected to it.
If a ground fault condition occurs, the keypads display SERVC GND FAULT and the control
panel sends a GROUND FAULT TROUBLE, AREA 1. When the control panel recognizes that the
ground fault condition is corrected, and remains corrected for between 5 to 45 consecutive
seconds, a Restoral Report is sent.
2.5.3 Enabling Ground Fault Detection
To enable the Ground Fault Detect Enable feature, lock (close) the S4 Ground Fault Detect Pin
on the control panel.
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