H3C Technologies H3C S5120 Series Switches - Manual (Page 39)

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Step4 Cut the grounding cable to a proper length according to the distance between the switch and the
grounding strip.
Step5 Peel 5 mm (0.20 in) of insulation sheath, and then insert the naked metal part through the insulation
covering into the end of the OT terminal.
Step6 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 blower to make it completely cover the metal part.
Step7 Connect the OT terminal to the grounding pole of the grounding strip, and then fasten it with a hex nut.
Figure 38 Connect the grounding cable to the grounding strip
(1) Grounding post (2) Grounding strip
(3) Grounding cable (4) Hex nut
CAUTION:
•
Only the grounding cables supplied with the S5120-28P-HPWR-SI and S5120-28P-PWR-SI provide OT
terminals at the ends connecting the grounding strip. For other switch models, prepare proper OT
terminals by yourself.
• The fire main and lightning rod of a building are not suitable for grounding the switch. The grounding
cable 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 zinc-coated. Weld the
yellow-green grounding cable to the angel iron or steel tube and treat the joint for corrosion protection.