H3C Technologies H3C S9500E Series Switches - Manual (Page 25)

15
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 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 if potential hazardous conditions exist, for example, when the switch has power.
• Always check that the power has been disconnected.
ESD prevention
To prevent the electronic components from being damaged by the electrostatic discharge (ESD), follow
these guidelines:
• Ground the switch properly. For how to ground your switch, see "Installing the switch."
• 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 attach the ESD-preventive wrist strap:
1. Wear the wrist strap on your wrist.
2. Lock the wrist strap tight around your wrist to keep good contact with the skin.