Chapter 2 Preparing for Installation
e safety recommendations described in
To prevent device damage and bodily injury, please read carefully th
this chapter.
The recommendations do not cover all possible hazardous situations.
Grounding and Lightning Protection
Use galvanized steel flat bar (or copper) as horizontal grounding conductor. The steel size should be less than 40
mm x 40 mm. Use galvanized angle steel as vertical grounding conductor. The steel length should be 2.5 m and the
be
n dimensions less than 300 mm2 as the main vertical ground wire for tall buildings.
rk cable through the steel pipe and ground the pipe at both ends.
ening protection, install the lightening
arrester with the grounding cable connected. .
an 5 ohms. In an area with a higher soil resistivity, reduce the soil resistance
vity.
Preparing Installation Site
Do not subject the AP to unstable voltage, vibration, and noises.
size should be less than 50 mm x 50 mm x 5 mm. The steel pipe wall thickness should be less than 3.5 mm.
Use galvanized steel flat as a grounding wire. The length of the wire should be less than 30 m and the size should
40 mm x 4 mm or 50 mm x 5 mm.
Use copper bars with cross-section dimensions less than 160 mm
2
as ground bus bars. Use copper bars with
cross-sectio
If the distance between the ground bus bar at each floor and the LEB is short, use stranded copper wires with
cross-section dimensions of 16 mm2; if the distance is long, the cross-section dimensions should be greater than 35
mm2.
Use a shielded network cable and make sure that the devices at the two ends of the cable, and the shielded sleeves
are well grounded. Alternatively, run the netwo
A high performance lightning arrester is integrated into the AP with 6KV lightening protection. In general, no
additional lightening arrester is required. If there is higher requirement for light
The ground resistance should be less th
by spreading ground resistance reducer powder to reduce the soil resisti
Do not expose the AP to high temperature, dusts, or harmful gases.
Do not install the AP in an inflammable or explosive environment.
Keep the AP away from EMI sources such as large radar stations, radio stations, and substations.