Personal protective grounding practices can vary from one utility to the next. Practices could includeterms such as grounding both sides, bracket grounding, equipotential bonding and single pointgrounding. The use of equipotential bonding is often plagued by inconsistencies and a lack of acceptance and may not be as practiced in Transmission as in Distribution work. Utility standard operating procedures may allow for more than one grounding method, such as: “Grounding between the work area and any sources of supply” or “Grounding at the worksite (equipotential)”. As such, staff members that wish to work more safely often have questions regarding what is safe and why certain procedures are used.
A number of previous studies have been conducted on this subject, most notably: (1) a series of four projects conducted by EnerNex for CEATI DALCM which investigated the conditions under which line technicians can safely work on de-energized distribution systems, including overhead lines and underground cables and (2) 26 documents on worker-safety related issues developed out of a survey conducted by Paul Hotte. The information from these documents was used to develop this comprehensive Personal Protective Grounding (PPG) reference guide that addresses practical issues related to the use and application of PPG.
Worker Safety, Accidental Energization, Grounding, Bonding, Neutral Potential Rise, Shock Hazards, Underground Systems, Electromagnetic Coupling, Induction Hazard, Distribution Lines