27 AC-2000 | 8.10/8.11
7.4 What Should Be Grounded?
Any equipment that is or could become energized, even accidentally, should be grounded. Current from
lightning, strikes objects in a random fashion. Accounts of lightning strikes reveal scenarios most of us
could not predict.
Electric circuits should be wired with a 3-wire conductor consisting of hot, neutral and grounding wires. The
grounding wire should be attached cleanly and securely to devices or systems to be grounded. The other
end of the grounding wire should be attached to the ground bus on the main panel.
7.5 Lightening Protection
Because of the potential for lightning damage to electronic devices, Rotem recommends supplying lightning
protection on both the power supply and the communication terminals (if used).
7.5.1 Power Line Protection
The Rotem RPLP-1 provides lightning protection to the AC-2000 Controllers. Refer to the RPLP-1
documentation for detailed wiring instructions. While no lightning protection is perfect, the RPLP-1
significantly enhances the reliability of built-in lightning protection. In addition, Rotem recommends using an
isolation transformer in front of the RPLP-1 to help block lightning and other transients.
NOTE: Common surge protectors provide little additional protection, and may trip unnecessarily.
An isolation transformer preceding the RPLP-1 provides significant additional protection against lightning.
7.5.2 Communication Line Protection
The Rotem RCLP-1 provides communication protection for the AC-2000. Refer to the RCLP-1
documentation for detailed wiring instructions. Since outdoor communication lines can receive and conduct
powerful electromagnetic pulses into the controllers and cause significant damage, Rotem advises using a
RCLP-1 prevent damage to the units.
NOTE: Common surge protectors provide little additional protection and may trip unnecessarily.
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