Part 1 of this article began with discussion of the first American power systems, when lineworkers initially encountered the hazards of working on de-energized lines (see https://incident-prevention.com/blog/the-evolution-of-personal-protective-grounding-part-1/). This led to early personal protective grounding (PPG) efforts using trial and error. We also reviewed Charles Dalziel’s contributions toward a greater industry understanding of dangerous current levels. In short, Part 1 confirmed the need for PPG as a key lineworker safety precaution. In this second and final part, we will review…

For decades, air has been used to effectively and inexpensively maintain phase-to-phase and phase-to-ground clearances of overhead distribution and transmission power lines and electrical equipment. Air’s extremely high resistance offers excellent protection against the passage of current. The greater the nominal system voltage, the greater the air gap required to prevent a flashover and short-circuiting. Due to its dielectric properties, air is also used to protect workers from electric shock. Incident Prevention readers who work in the electric utility industry are familiar with the term…

Arc flash labels are a commonplace requirement for photovoltaic (PV) projects. However, arc flash studies and the resulting labels are sometimes treated as check-the-box exercises. In my experience as an engineer, I have found that questions are rarely asked regarding integration of PV arc flash labels into a safe, effective operations and maintenance plan. Engineers who charge by the man-hour can generate these labels all day long, yet they aren’t the ones tasked with donning PPE to perform hot work. A fundamental link is missing in terms of safety. Essentially, arc flash labels provide e…

Over the past 50 years, the electric utility industry has developed and implemented robust engineering controls, detailed work procedures and focused training to reduce injury and fatality rates among workers. However, the total well-being of the worker is another critical safety factor that utility organizations often don’t address. Well-being encompasses physical health as well as mental, emotional and social dimensions that can significantly influence an individual’s capacity to make sound decisions, maintain situational awareness and successfully mitigate risks. Workers bring their who…

I have written about grounding for the protection of employees numerous times in Incident Prevention magazine, addressing both the law and other issues. Let’s begin this installment with the understanding that “grounding for the protection of employees” – which is the phrase OSHA uses – means establishing an equipotential zone or EPZ. The purpose of grounding is to trip circuits. Grounding for the protection of employees can only be assured if it is arranged in an equipotential manner, preventing the worker from being exposed to a hazardous difference in potential. That’s the bottom line, and…

Personal protective grounding, or PPG, is arguably the most critical safety procedure affecting contemporary lineworkers. Over time, it has evolved to include numerous significant elements that contribute to the success of today’s comprehensive methods and procedures. To adequately address these elements, this article will be presented in two parts. Part one, which you are now reading, covers PPG’s early years. Part two – scheduled to be published in the October-November issue of Incident Prevention – will cover the critical testing and development that led to the methods and procedures cu…

The first three articles in this six-part series addressed the critical nature and value of an organizational safety management system (SMS) that engages all employees and effectively mitigates risks through a developed plan for continuous improvement. This article focuses on human and organizational performance (HOP), an operational philosophy that utility organizations must incorporate into their SMS to achieve organizational safety success. Over the years, traditional safety programs have primarily focused on managing employees, often overlooking the crucial systems designed to support…

In my consulting work, I’ve found there is some industry confusion regarding the relationship between a host utility and an independent contractor company. To help provide clarity, I’m going to kick off this installment of “Voice of Experience” with an overview of each party’s obligations from an OSHA perspective. A contract employee performs work covered by a signed agreement between the host utility and the contractor company. The host’s construction coordinator must work with contract employees on the host’s system. The host must also provide training for the tasks contract employees ar…

Q: If a crew is setting a steel pole between energized phases (69 kV), would the 3.29-foot minimum approach distance found in OSHA Table 6 apply, or should we defer to the 15-foot clearance? A: Setting poles is new construction that OSHA covers in 29 CFR 1926.960, Table V-5, “Alternative Minimum Approach Distances for Voltages of 72.5 kV and Less.” There is cover rated up to 72 kV phase to phase, so for a 69-kV system, cover can be used. Without cover, an electrical crew can use the 3.29-foot MAD for phase to ground. If cover is not used and a conductive object could enter the electrica…