Use appropriate AC or DC power, power distribution, and grounding for your specific installation.
Use a vinyl floor covering in your wiring closet. (Concrete floors accumulate dust, and carpets can cause static electricity.)
Prevent unauthorized access to wiring closets by providing door locks. Install the equipment in a secured, enclosed, and restricted access location, ensuring that only qualified service personnel have access to the equipment.
Provide adequate overhead lighting for easy maintenance.
Be sure that each wiring closet has a suitable ground. All equipment racks and equipment installed in the closet should be grounded.
Be sure that all system environmental requirements are met, such as ambient temperature and humidity.
Note
Consult an electrical contractor for commercial building and wiring specifications.