Chapter 4 _______________________________________________________________ Installation
VAISALA ______________________________________________________________________ 121
Mounting and Connecting Optional
TERMBOX-9000 (Junction Box)
TERMBOX-9000 enables a separate connection of the underground
cables and incorporates enhanced overvoltage protection. The
TERMBOX is to be mounted below the interface unit enclosure and
enables short cableways between foundation and cable feed-throughs.
WARNING
The AC power must be switched off until all power line wiring is
finalized.
1. Open the TERMBOX-9000 cover plate.
2. Connect a short grounding cable (4 mm
2
) to the grounding clamp at
the left bottom side of the box. See Figure 82 below.
0401-102
Figure 82 Grounding Cable for TERMBOX
3. Screw the box onto the transmitter mast below the interface unit.
Use the screws from the delivery and hex socket driver size 5.
4. Connect the grounding cable carefully to the grounding bolt at the
base plate below the box. The wrench size is 17. See Figure 82
above.
5. Use a short 3-conductor power cable (3 x 1.5 mm
^2
) with free wire
ends. Connect this power cable to the corresponding terminals
inside the TERMBOX. Use a fitting cable feed-through.
CAUTION
Double-check that the AC power is switched off.
No voltage must be detected at the end of the underground power cable.
6. Route the underground cable through a fitting cable
feed-through and connect the power lines carefully.
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