Safety Recommendations - H3C S12508-AC Installation Manual

Preparing for installation

Safety recommendations

To avoid any equipment damage or bodily injury caused by improper use, read the following safety
recommendations before installation. Note that the recommendations do not cover every possible
hazardous condition.
General safety recommendations
Take adequate safety measures to avoid injury and switch damage. For example, wear an
•
ESD-preventive wrist strap.
• Make sure that the ground is dry and flat and anti-slip measures are in place.
Keep the chassis clean and dust-free.
•
Do not place the switch on a moist area and avoid liquid surrounding the switch.
•
Keep the chassis and installation tools away from walk areas.
•
Move the switch and heavy components (such as the power supplies or chassis) with other people
•
rather than doing that alone.
Electricity safety
Clear the work area of possible hazards, such as ungrounded power extension cables, missing
•
safety grounds, and wet floors.
Locate the emergency power-off switch in the room before installation. Shut the power off at once in
•
case accident occurs.
• Unplug all the external cables (including power cables) before moving the chassis.
Do not work alone when the switch has power.
•
• Always check that the power has been disconnected.
ESD prevention
CAUTION:
To prevent the electronic components from being damaged by the electrostatic discharge (ESD), you
should not only take ESD measures where the switch is located, but also take the following precautions:
Always wear an ESD-preventive wrist strap when installing components, especially the electronic printed
•
circuit boards.
Hold a PCB by its edges. Do not touch any electronic components or printed circuit.
•
• Check the resistance of the ESD-preventive wrist strap for safety. The resistance reading should be in the
range of 1 to 10 megohm (Mohm) between human body and the ground.
To use the ESD-preventive wrist strap:
Wear the wrist strap on your wrist.
1.
17