Huawei DBS3900 Installation Manual page 108

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Operator
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1.1.2 Electrical Safety
High Voltage
The high voltage power supply provides power for the device operation. Direct or indirect
contact (through damp objects) with high voltage and AC mains supply may result in fatal
danger.
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Non-standard and improper high voltage operations may result in fire and electric shock.
Therefore, you must abide by the local rules and regulations when bridging and wiring AC
cables. Only qualified personnel are allowed to perform high voltage and AC operations.
Issue (02)
Move or lift the chassis by holding its lower edge. Do not hold the handles on certain
modules such as power supply, fans, and boards because they cannot support the weight
of the device.
Do not look into the optical port without eye protection.
Do not wear jewelry or watches when you operate the device.
Only qualified professional personnel are allowed to install, configure, operate, and
disassemble the device.
Only the personnel authenticated or authorized by Huawei are allowed to replace or
change the device of the parts of the device (including the software).
Any fault or error that might cause safety problems must be reported immediately to a
supervisor.
Only qualified personnel are allowed to remove or disable the safety facilities and to
troubleshoot and maintain the device.
During the installation of the AC power supply facility, follow the local safety
regulations. The personnel who install the AC facility must be qualified to perform high
voltage and AC operations.
Do not wear conductive articles, such as watches, hand chains, bracelets, and rings
during the operation.
When water is found in the rack or the rack is damp, switch off the power supply
immediately.
When the operation is performed in a damp environment, make sure that the device is
dry.
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