1.3 Electrical Safety
Grounding
●
The protective ground of the equipment should be reliably connected to the
ground screw on the metal enclosure (grounding resistance ≤ 0.1 ohm).
●
For the equipment that needs to be grounded, install the ground cable first
when installing the equipment and remove the ground cable last when
removing the equipment.
●
Do not damage the ground conductor.
●
Do not operate the equipment in the absence of a properly installed ground
conductor.
●
For the equipment that uses a three-pin socket, ensure that the ground
terminal in the socket is connected to the protection ground.
AC and DC Power
D ANGER
● The power system is energized by power sources with hazardous voltage. Direct
or indirect contact (through damp objects) with the power sources may result
in electric shock.
● Non-standard and improper operations may result in fire or electric shock.
● Do not connect or disconnect power cables with power on. Transient contact
between the core of the power cable and the conductor will generate electric
arcs or sparks, which may cause fire or personal injury.
●
If the power supply to the equipment is permanently connected, install an
easily accessible disconnector at the exterior of the device.
●
Before making electrical connections, switch off the disconnector on the
upstream device to cut off the power supply if people may contact energized
components.
●
If a "high electricity leakage" tag is attached on the equipment, ground the
protective ground terminal on the equipment enclosure before connecting the
AC power supply; otherwise, electric shock as a result of electricity leakage
may occur.
●
Before installing or removing a power cable, turn off the power switch.
●
Before connecting a power cable, check that the label on the power cable is
correct.
●
Before connecting the power supply, ensure that cable connections are
correct.
●
If the equipment has multiple inputs, disconnect all the inputs before
operating the equipment.
ETP4860-B1A2 Embedded Power
User Manual
1 Safety Precautions
Issue 04 (2021-01-05)
Copyright © Huawei Technologies Co., Ltd.
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