Installation Manual
H3C WA2200 Series WLAN Access Points
Chapter 2 Installation Preparations
2-4
Caution:
z
If the voltage is unstable, a voltage regulator or stabilizer is required.
z
An uninterrupted power supply (UPS) is required for uninterrupted communication.
2.3.4 Grounding and Lightning Protection
Table 2-5
Grounding and lightning protection requirements
SN
Item
Requirements
1
Grounding
resistance
z
The grounding resistance is usually required to be less
than 5 ohms, and less than 10 ohms in an area with less
than 20 thunderstorm days a year.
z
The top of the grounding body should be at least 0.7 m
(2.30 ft) away from the ground surface. In cold areas, the
grounding body should be buried below the frozen soil
layer.
2
Grounding
lead-in
The grounding lead-in should be no longer than 30 m (98.43
ft). A zinc-coated flat steel with a cross-section area of 40 × 4
mm (1.57 × 0.16 in) or 50 × 5 mm (1.97 × 0.20 in) is
recommended.
3
AC power
grounding
The neutral line of the power cord should not be connected
with the PGND of other communications equipment.
4
Lightning
protection
z
In plain areas, the protection angle of the lightning rod
should be less than 45 degrees. In mountainous areas or
lightning areas, the protection angle should be less than
30 degrees. The lightning protection grounding (for
example, the grounding of the lightning rod) should be
connected to the grounding body of the equipment room.
z
The AC power system in the equipment room should be
equipped with a lightning protection box. The grounding
cable for the lightning protection box should be greater
than 25 mm
2
(0.039 in
2
) in area, and less than 30 m (98.42
ft) in length.
5 Feeder
z
The antenna support is already prepared according to the
design requirements.
z
A feeder lightning rod is already installed and grounded
according to the design requirements.
After you have completed the preparations, you can start installing the AP. The
installation of indoor models (including the enhanced model) is different from that of the
outdoor models. For details, refer to Chapter 3 “Installation of Indoor APs” on page 3-1
and Chapter 4 “Installation of Outdoor APs” on page 4-5.