INITIAL CONSIDERATIONS - Prestressed Concrete Transmission Pole Structures - page 19

GROUNDING
The grounding of concrete poles can be external, internal, or both to
the pole (see Fig. 2-4). When the pole is to be externally grounded, a
threaded insert normally is provided for attaching the ground clamp.
Internal grounds can be imbedded in the concrete or pulled through the
center void as required. Purchasers often use a combination of internal
grounding with an external ground pad near the groundline of the pole.
Fig. 2-3. Conductor insulator, bracing, climbing, and grounding attachments
to the pole
Source: Photograph courtesy of Georgia Transmission Corp. Reproduced with
permission.
Fig. 2-4. Internal pole groundwire detail
Source: Illustration courtesy of American Electric Power. Reproduced with
permission.