Figure 3-20: Pole Grounding - Baicells Aurora243 Installation Manual

Aurora243 Outdoor 2x10W TDD gNodeB Installation Guide

Figure 3-20: Pole Grounding

1. The installation position of the grounding bar should meet the design requirements. The holding
pole and tower body must be connected to the lightning protection network or grounded with a
separate lead.
2. The diameter of the grounding wire should meet the design requirements. The copper nose must
be used for grounding, and the grounding resistance is required to be less than 10 ohms. If the
resistance of the public network communication equipment placed in other systems is less than
10 ohms, the grounding network of the system should be overlapped.
3. The grounding wire must be the whole wire material. When laying, it should be bound separately
from other cables. All grounding wires should be fixed with wire core or binding tape with a fixed
spacing of 12 inches (0.3 m).
4. The copper bar must be used for the grounding bar, and the specification of the grounding bar
shall meet the design requirements. If there are no specific requirements in the design, use 12 x
1.6 x 0.16 in (300 × 40 × 4 mm) and fix with expansion bolts.
5. The grounding wire must be made of the whole cable material, the intermediate joint is strictly
prohibited, and the excess length should be cut. The skin shall be complete, and the insulation
resistance of the core wire to the ground (or metal isolation layer) shall meet the technical
requirements of the cable.
6. The grounding wire shall be connected to the integrated grounding bar of the building. Suppose it
is impossible to connect to the integrated grounding bar of the building. In that case, the
appropriate grounding point can be selected according to the integrated grounding situation of
the indoor building. The selection of the grounding point must be higher than the grounding grid,
and the feeder grounding shall be towards the downward direction of the feeder, never upward.
7. The grounding electrode of the self-built grounding grid for the outdoor antenna of the tunnel
must meet the design requirements. The grounding electrode's buried depth and the flat iron's
welding quality must meet specifications. In principle, the buried depth of the grounding electrode
shall not be less than 27.5 in (0.7 m). The non-self-built grounding network shall be connected to
the grounding network of the owner.
8. The gNB grounding, power adapter grounding, distribution box grounding, and feeder grounding
must be independently connected to the grounding bar, and the grounding bar must have a path
from the lead to the earth.
27