Grounding Distribution Lines WM 4.1
When placing grounding clamps beside each other on a conductor, keep them as close together as possible. The required distance is
3" or less
Energized and de-energized secondary cables may be located using either the
e direct connect, coupler, or induced method
The purpose of this work method is to establish standards for the role of the Designated Observer (DO) to ensure worker safety while performing energized primary tasks above
600V
Connections are made from the system neutral to the closest phase and then cascade from phase-to-phase (a phase-to-phase fault will clear the upstream device more quickly). This is the required connection type
Daisy Chain
energized primary cables can never be located by this method
Direct Connect
The DO must be engaged from " " when operating an aerial device and " " when climbing.
What is Cradle to Cradle
What is Ground to Ground
Do not attempt to work around any downed conductor(s) until you have verified the following
Number of downed conductors
• Type (primary or neutral)
• Source of feed
• Protective device for each conductor
When the direct connect method is used on energized secondary cables, you must verify the
Cables source voltage
At any time during the job, any crew member can call this phrase if they recognize a hazard that was not identified on the PJB
All Stop
Duke Energy is an equipotential grounding company and all connection types require a
Structure Bond
Take all required precautions to avoid exposure to
High Voltages
To transfer the DO role to the alternate, the original DO must
Call an all stop and communicate the exchange of responsibility to the alternate DO
Failure to clean grounds prior to installation will reduce grounding effectiveness and increase the chance of personal injury. Re-clean all surfaces if grounds have not been installed within
20 minutes due to re-oxidation
All hazards are identified and mitigated when
prior and throughout the job
Operating a digger derrick or backyard machine within this distance of energized primary conductors or equipment above 600 V (covered or uncovered) requires a DO.
What is 10 feet