Panasonic KX-TDA30 Installation Manual page 52

2.2 Installation of the Hybrid IP-PBX
1.
Installation location of the earth rod.....Near the protector
2.
Check obstructions.....None
3.
Composition of the earth rod.....Metal
4.
Depth of the earth rod.....More than 50 cm
5.
Cross sectional area of the earthing wire.....More than 1.3 mm
Notes
• The above figures are recommendations only.
• The length of earth rod and the required depth depend on the composition of the soil.
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