Step1 Cut the PGND cable to a proper length according to the distance between the switch and the grounding strip.
Step2 Peel 5 mm (0.20 in.) of insulation sheath using a wire stripper, and then insert the naked metal part through the black insulation covering into the end of the OT terminal.
Step3 Secure the metal part of the cable to the OT terminal with a crimper, and then cover it with the insulation covering. Then heat the insulation covering with a blowing machine to let it completely cover the metal part.
Step4 Connect the OT terminal to the grounding pole of the grounding strip, and then fasten it with a hex nut.
Figure 3-12 Connect the PGND cable to the grounding strip
| (1) | Grounding post | (2) | Grounding strip |
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| (3) | PGND cable | (4) | Hex nut |
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The fire main and lightning rod of a building are not suitable for grounding the switch. The ground wire of the switch should be connected to the grounding device for the equipment room.
Where a Grounding Conductor Can be Buried
When there is no grounding strip, but an area with exposed earth is available nearby where a grounding conductor can be buried, hammer a 0.5 m (1.64 ft.) or longer angle iron or steel tube into the earth. The angle iron should have a dimension no less than 50 × 50 × 5 mm (1.97 × 1.97 × 0.20 in.) and the steel tube should have a wall thickness no less than 3.5 mm (0.14 in.) and be