Civil Engineering Reference
In-Depth Information
Grounding the Installed Pole
Installed poles must have a low resistance continuous path to ground.
Poles can be grounded using either an external ground wire attached with
ground clips on the surface of the pole or with an internal ground wire
cast into the pole. In either case, the pole's steel reinforcement should be
bonded to the grounding system. Tank grounds should be provided at
each hardware attachment location on internally grounded poles to bond
line hardware to the internal ground wire (see Fig. 8-11).
An erected pole should be grounded as soon as possible with the instal-
lation of a ground rod or equivalent at a minimum. When a pole line is
parallel to an existing energized line it is advisable to install the full
grounding requirement as part of the pole erection activity. IEEE 524
(IEEE 1992) requirements for stringing and working parallel to energized
lines should be implemented.
Temporary grounds should not be attached to step bolts. Step bolt
inserts are not a bonded path to ground.
Caution should be exercised when fi eld drilling or cutting a pole with
an internal ground. No fi eld drilling should be permitted in close proxim-
ity of an internal ground wire. If there is a possibility that an internal
ground may have been damaged by drilling or cutting, the Purchaser
should be immediately contacted and an approved ground restoration
completed prior to further fi eld work on the pole.
Fig. 8-11. Pole grounding drawings
Source: Illustration courtesy of American Electric Power. Reproduced with
permission.
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