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Before You Start
ETEP Installation Guide 25
ETEP Site Preparation
Most ETEP models can be mounted in a standard 19-inch rack using the supplied mounting kit, or simply
placed on a rack shelf or solid surface. Before installing the ETEP in a 19-inch rack, consider the
following guidelines:
● Ambient temperature
Install the ETEP in an environment compatible with the 40ºC maximum recommended ambient
temperature. Extra clearance above or below the unit on the rack is not required; however, be aware
that equipment placed in the rack beneath the ETEP can add to the heat load. Therefore, avoid
installing in an overly congested rack. Air flowing to or from other equipment in the rack might
interfere with the normal flow of cooling air through the ETEP, increasing the potential for
overheating.
● Air flow
Make sure that there is sufficient flow of air around the ETEP so that safe operation is not
compromised. Maintain a clearance of at least 3 inches (7.62 cm) at the sides of the ETEP to ensure
adequate air intake and exhaust. If installing in an enclosed rack, make sure the rack has adequate
ventilation or an exhaust fan. An enclosed rack with a ventilation system that is too powerful can
prevent proper cooling by creating negative air pressure around the ETEP.
● Mechanical Loading
Keep the center of gravity in the rack as low as possible. This ensures that the weight of the ETEP
will not make the rack unstable. Make sure that the rack is secured and use the proper mounting
hardware to secure the ETEP to the rack.
● Circuit Loading
Consider the connection of the ETEP to the supply circuit and the effect that overloading of circuits
might have on overcurrent protection and supply wiring. Consult the voltage and amperage ratings on
the UL label affixed to the unit’s rear panel when addressing this concern.
● Grounding
Maintain reliable grounding of a rack-mounted ETEP. Pay particular attention to supply connections
other than direct connections to the branch circuit, such as the use of power strips.
● Maintenance
Allow at least 19 inches (48.3 cm) of clearance at the front of the rack for maintenance. Use a cable-
management system to help keep cables organized, out of the way, and free from kinks or bends that
degrade cable performance.