Andover Controls DCX 250, Installation Manual

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Hardware Installation
4 DCX 250 Installation Guide
Capacitance of Infinet cable should be nominal, below 12.5 pF/ft be-
tween conductors and below 22 pF/ft between the conductor connected
to ground and the next conductor.
Lightning Protection
Warning
When running cables between buildings you must install lightning
arresters for Infinet to prevent electromagnetic disturbances.
Use lightning arresters at each point where Infinet cable enters or exits
a building. Use the following arrester:
Two pair gas tube arrester, Andover Controls # 01-2100-299.
Building Ground Requirements
Warning
Be sure that all Infinity hardware products from Andover Controls
Corporation are grounded to true earth ground. This kind of ground
protects the equipment from voltage transients and other power surges
in the area. We cannot guarantee that the controller system will operate
as documented unless you properly ground all controllers.
Warning
Be sure to have your grounds inspected before you begin the
installation process to be sure your municipality follows the National
Electrical Code. Many municipalities do not and may have substandard
electrical grounds.
An example of a substandard ground is a galvanized steel cold water
pipe. As the pipe corrodes, it does not act as a true ground. The corro-
sion acts as an insulator, raising the potential of the pipe with respect to
the ground.
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