User manual

26 Chapter 2 Installation Process
320846-A
For proper air circulation, the vents on the front and back of the device should not
be blocked or obstructed by cables, panels, rack frames, or other materials.
Electrical safety
To avoid the possibility of serious personal injury or damage to equipment due to
electrical malfunction, follow these precautions.
• Circuits and wiring must support the rated power draw of the equipment.
• Total rack-power load is equal to a maximum of eighty percent of the branch
circuit rating.
• Power cords are free of obstructions.
• Power cords at plugs, convenience receptacles, and points of exit from the
Nortel Secure Network Access Switch 4050 are carefully positioned.
Mechanical safety
For rack mounted installation, ensure that racks are stable and securely installed.
Danger: Use only power cords that have a grounding path. Without a proper ground, a
person who touches the switch is in danger of receiving an electrical shock. Lack of a
grounding path to the switch may result in excessive emissions. (See “Safety Message
Translations” on page 39 for translations of this notice.)
Caution: When mounting this device in a rack, do not stack units directly on top of one
another in the rack. Each unit must be secured to the rack with appropriate mounting
brackets. Mounting brackets are not designed to support multiple units. (See “Safety
Message Translations” on page 39 for translations of this notice.)