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Electrical Safety
Observe the safety precautions about high voltage, lightning strikes, high electrical leakage, power cables, fuses, and electrostatic discharge.
High Voltage
- The equipment is powered by high-voltage power sources. Direct or indirect contact (especially through damp objects) with high-voltage power sources may result in serious injury or death.
- Non-standard and improper high voltage operations can result in fire and electric shock.
Thunderstorm
This requirement applies only to radio base stations or equipment with antennas or feeders.
Do not perform any operation, including high-voltage and AC operations, on a steel tower or mast during a thunderstorm.
High Electrical Leakage
- Ground the device before powering it on. Otherwise, high leakage currents can cause personal injury or device damage.
- If a "high electrical leakage" tag is present on the power terminal of the device, you must ground the device before powering it on.
Power cable
- Do not install or remove power cables when the device is on. Transient contact between the core of the power cable and the conductor may generate electric arcs or sparks, which can cause fire or hurt human eyes.
- 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.
Fuse
If a fuse is to be replaced, the new fuse must be of the same type and specifications.
ESD
Static electricity generated by human bodies can damage electrostatic-sensitive components on boards, for example, large-scale integrated (LSI) circuits.
- Friction between bodies, clothing, and other surfaces causes static electromagnetic fields on human bodies, which must be discharged.
- To prevent electrostatic-sensitive components from being damaged by static electricity on human bodies, wear a well-grounded ESD wrist strap when handling the device, boards, or application-specific integrated circuits (ASICs).
Figure 1-1 shows how to wear an ESD wrist strap.
