2.8. Grounding A2 WiFi Access Point/Bridge
It is essential to properly ground all equipment to prevent the A2 from the electrical
damage and possible electric hazer due to non-proper power grounding. Use a
10AWG grounding wire to connect to the ground connector of the A2 WiFi Access
Point/Bridge by screw driver. Secure the grounding screw tight and the strap
connects to the ground (Please refer to 错误!未找到引用源。3 for the position of
Grounding point of A2).
It is recommended that the A2 WiFi Access Point/Bridge should be installed with
lightning rod to avoid any potential electrical damage and to be connected with the
ground node to the existing ground. Proper grounding will always be the safety
consideration for the A2 WiFi Access Point/Bridge.
Note: Grounding kits are not provided in the package.
2.9. Surge Protection
The type of Ethernet cable to be used in outdoor deployment is critical. The Ethernet
cable should be either CAT5 or CAT5e, outdoor rated, and shielded. Specifically, the
following types of Ethernet cable should be used for outdoor installation: sFTP, FTP, or
STP.
Using UTP Ethernet cable and / or unshield RJ-45 jack are not recommended due
to the increased electromagnetic noise level for outdoor deployment. Furthermore,
using shielded CAT5 Ethernet cable without using shielded RJ45 jack at the base
station and PoE injector may cause more problems than not using it. This is because if
a shielded CAT5 Ethernet is ungrounded, it will act as a magnet for static charges
present in the environment. Since the charges cannot be discharged properly
through a shielded RJ45 jack, it may couple with the internal data or power lines of
the PoE cable. As a result, the coupling of high voltages present on the Ethernet
cable may damage the base station directly interfacing with it. Therefore, it is
important to always use shielded outdoor rated Ethernet cable together with shielded
RJ45 jack in outdoor deployment.
The only difference between crimping an UTP cable and a FTP cable is that the
latter has a small wire under the foil. This wire (preferably 2cm longer than other wires),
also known as the drain wire, should be wrapped around the outside of the shield
when installing the shielded RJ45 plug. It is very important to have direct contact
between the foil and the shield of the RJ45 connector.
The following figure shows a shielded, metal-enclosed RJ45 connector. First the
boot is slid onto the cable, then the cable shield and drain wire are folded back, next
the load bar is loaded with the eight inner cable conductors, then the load