Ksu Grounding - Vodavi Starplus Triad 1/2/3 Installation Manual

3-12

KSU Grounding

To ensure proper system operation and for safety purposes, a good earth
ground is required.
A metallic COLD water pipe usually provides a reliable ground path.
Carefully check that the pipe does not contain insulated joints that could
isolate the ground path. In the absence of the COLD water pipe, a ground
rod or other source may be used.
A #14 Insulated AWG or larger copper wire should be used between the
ground source and the KSU. The wire should be kept as short as possible,
it is recommended that the wire be no longer than about 25 feet.
Grounding Instructions
1. Remove about 1½ inches of insulation from both ends.
2. Attach one end of the wire to the Ground Lug in the middle of the
3. Take a DC resistance reading and an AC Volt reading between the
Basic KSU by inserting the wire under the lug screw and tighten the
screw securely. Refer to Figure3-5. Attach the other end of the wire as
appropriate to the ground source.
chassis ground point (cold water pipe) and AC ground (third wire AC
ground). The limit is 5V AC and 5 Ohms DC resistance. If a higher
reading is obtained, choose a different chassis ground point and
repeat this step until a suitable ground point is found.
Grounding to an electrical conduit is NOT considered a good
ground!
KSU Grounding