13
Checking the Installation
Checking the Installation of Power Cables
1
No.
Item
1
All the power cables and PGND cables are copper-core cables.
2
There are no solder joints or connectors in the power cables and the PGND cables.
3
There is no breaking equipment such as switches and fuses in the electrical connection of the grounding
system.
4
The grounding bars and PGND bars are connected to the same grounding conductor.
5
The earth resistance is smaller than 10 ohms.
6
The OT terminals at both ends of the power cables or PGND cables are soldered or crimped securely.
7
The bare wires and OT terminals at the wiring terminals are tightly wrapped up with the insulating tape or
heat-shrinkable tubes.
8
All screws are fastened. The flat washers and spring washers are mounted. The spring washers are
placed between the flat washers and the screws.
9
The power cables and PGND cables connecting the PDB with the functional modules and the PGND
cables connecting the modules with the grounding bar are all correctly installed and in good contact.
10
The power cables and PGND cables are bound separately from other cables.
11
Labels are attached at both ends of the power cables and the PGND cables.
2
No.
Item
1
There are no solder joints or connectors in the signal cables. The signal cables are not scratched or
broken.
2
The connectors of the signal cables are tight and secure.
3
Proper length of the cable is reserved at the connectors.
4
Proper length is reserved for the signal cables at turning points.
The turning radius meets the requirement.
5
The signal cables connected to the left part of the subrack are led out of the subrack from the left.
Similarly, the signal cables connected to the right part of the subrack are led out of the subrack from the
right.
6
The signal cables are bound separately from the power cables.
7
The extra length of the cable ties must be cut and the cut surface must be smooth.
8
The signal cables are bound and arranged neatly and closely. The cable ties are spaced evenly. The tips
of the cable ties point to the same direction.
9
The cables whose connectors are far away from the cable entrance are arranged at the external side of
the cable bundle, while those near the entrance are arranged at the internal side of the cable bundle. The
trunk cables are laid out smoothly without any tangling.
Checking the Installation of Signal Cables
2
