LG GDK-20W User Manual
Page 21
GDK-20W DIGITAL WIRELESS KEY TELEPHONE SYSTEM
23
KSU Grounding
The GDK-20W mains lead must be connected to a building mains supply that includes an earth connection in
conformance with current IEE requirements.
Earthling is required for user safety and to minimize EMC interference.
If does not connected mains earth, to ensure proper system operation and for safety purpose, a good earth ground is
required. A metallic COLD water pipe usually provides a reliable ground. Carefully check that the pipe does not contain
insulated joints that could isolate the ground path. If insulated joints exist, another earth ground source must be used or,
if allowed, the joints may be bridged.
A #14 AWG or larger copper wire should be used between the ground source and the connector, CN27, of the KSU. The
wire should be kept as short as possible, it is recommended that the wire be no longer than 8 meters.(about 25 feet)