Vaisala TERMBOX-1200, Руководство пользователя

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User's Guide ______________________________________________________________________
12 __________________________________________________________________ M210310EN-B
0210-017
Figure 4 TERMBOX Grounding
The following numbers refer to Figure 4 above.
1 = Cable
clamp
2 = 16mm
2
jacketed grounding cable
3 = Equipment grounding
4 = Alternative equipment grounding
The jacketed 16 mm
2
grounding cable is fastened to a special clamp on
the bottom of the TERMBOX. The grounding principles are:
- By default, the grounding cable is connected to the equipment
grounding rod used for grounding the pole and other electrical
equipment attached to the pole. Install the grounding rod as close to
the pole as possible in order to minimize the length of the grounding
cable. The grounding rod can also be cast inside the concrete base.
- Grounding rod length depends on the local ground water level. The
lower end of the grounding rod should continuously touch moist soil.