MyPower S4220 & S4320 Series Switch Installa
tion Manual V1.0
Maipu Confidential & Proprietary Information
Page 71 of 80
D.1.5
Laying Specifications of Signal Wires
The laying specifications of the signal wire are as shown in the following table.
A
P P ENDIX TA B L E
D- 4
L
A Y ING SP E CIF ICA TIO N S O F SI G NA L W IRE
No.
Description
1
If a digital relay line is directly or indirectly connected to the base station of
the wireless communication router, the E1 lightning arrester should be
installed on the corresponding interface of the router.
2
The metal outer sheath cable should be adopted outdoors. Both sides of the
metal outer sheath should be grounded reliably and connected to the
protection ground bar in the equipment room. When the cable enters indoors,
a signal lightning arrester should be added to the corresponding interface of
the router with the PGND cable of the signal lightning arrester as short as
possible.
3
The outer conductor of the coaxial cable and both sides of the shielded cable
must be electrically well connected to the outside surface of the metal
enclosure of the connector router.
D.1.6
Laying Specifications of Ground Wires
The laying specifications of the ground wire are as shown in the following table.
A
P P ENDIX TA B L E
D- 5
L
A Y ING SP E CIF ICA TIO N S O F GRO U N D W IRE
No.
Description
1
Ground lead should not be intertwined or parallel with the signal line.
2
Grounding cable cannot be led aerially, but should be buried in the earth or
routed indoor.
3
On the protection ground wire, prohibit installing the connectors; prohibit
installing the switch or fuse.
4
The protection ground wire should adopt the yellow and green plastic
insulated copper-core lead.
5
The neutral line of the AC power cable in the equipment room cannot be
connected with the protection ground of the transmission and communication
routers in the equipment room.
6
The length of the protection ground wire should not exceed 45 m, but should
be as short as possible. When exceeding 45m, it is required that the
consumer re-sets the ground bar nearby.
