WP1323 - Working Near Overhead and Underground Electric Lines

Electricity Entity Requirements:
Working Near Overhead and Underground Electric Lines

       used to restrain both the pole head and foot to maintain pole stability during nearby
        excavation work.
       set up and positioned to maximise support effectiveness and minimise impact on traffic,
        pedestrian, excavation and machinery at site; and maintain exclusion zone from overhead
        lines. If insufficient clearance exists to maintain exclusion zone to pole support equipment,
        arrangements may be required for de-energising the electric line.

                      Figure 1- Do Not Disturb Zone requirements when excavating near poles



            Minimum soil               Do not excavate within 5 m (horizontal
           area required               distance) of Electricity Entity poles with
          for pole support             earth leads or cables running down into the
              – ‘Do Not                ground, without prior approval from the
            Disturb’ zone              Electricity Entity.




                                                                                                 Ground Line


                                                                            250 mm
                                                          250 mm

                                                        45°

                                                              Do Not Disturb
                                                              Zone




Maximum Trench Depth                           Minimum Distance from pole without pole support
Not more than 0.25 m (250 mm)                  Can trench or hand dig (where cables and leads exist) right up to pole
                 1.0 m                                                               1.0 m
                 1.5 m                                                               1.5 m
                 2.0 m                                                               2.0 m
                 2.5 m                                                               2.5 m
                 3.0 m                                                               3.0 m

7.1.1       Certified Engineering Assessment
Where required to be provided by the PCBU, a Certified Engineering Assessment shall:
       Ensure the stability of the Electricity Entity poles and foundations is maintained during and
        as a result of excavation work completed within the ‘Do Not Disturb’ zone.
       Include detailed design drawing of pole support method.
       Be completed and certified by a Registered Professional Engineer Queensland.
       Consider and address the following key points as a minimum:
               Pole loading (vertical and lateral) including line deviation angles, direction of lean
                (towards or away from resultant loading)


Check this is the latest version before use.                  Page 22of30                                     EGX WP1323 Ver 2
9 June 2015                                                                                               EE BS001405R107 Ver 2
                            Joint Reference Document between Energex and Ergon Energy
                    Energex Limited ABN 40 078 849 055  Ergon Energy Corporation Limited ABN 50 087 646 062