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HP 5500 EI Series Installation Manual: Grounding The Switch With A Grounding Conductor Buried In The Earth Ground

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Figure 12 Making a grounding cable connector
Figure 13 Connecting the grounding cable to a grounding strip
(1) Grounding post
(3) Grounding cable
Grounding the switch with a grounding conductor buried in the
earth ground
If the installation site has no grounding strips, but earth ground is available, hammer a 0.5 m (1.64 ft) or
longer angle iron or steel tube into the earth ground to serve as a grounding conductor.
The dimensions of the angle iron must be at least 50 × 50 × 5 mm (1.97 × 1.97 × 0.20 in). The steel tube
must be zinc-coated and its wall thickness must be at least 3.5 mm (0.14 in).
Weld the yellow-green grounding cable to the angel iron or steel tube and treat the joint for corrosion
Figure 14 Grounding the switch by burying the grounding conductor into the earth ground
(1) Grounding screw
(4) Joint
(2) Grounding strip
(4) Hex nut
(2) Grounding cable
(5) Grounding conductor
(3) Earth ground
(6) Chassis rear panel


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