Tag: grounding


Are Your Temporary Protective Grounds Really Protecting You?

National equipment standards constantly evolve due to near misses and incidents that occur in the field. This evolution results in electric utilities adopting different work methods and procedures, equipment, education and training to keep utility workers and the public safe as every electric utility company builds and maintains the national electric grid. Personal protective grounds are placed between de-energized conductors in case the conductors become accidentally energized. The assembly creates a short circuit, causing the circuit to relay out, and protects a worker from dangerous differences...

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Train the Trainer 101: ASTM F855 Grounding Equipment Specs Made Simple

I define safety as identifying and managing hazards to prevent incidents. That is accomplished using a broad array of tools and rules for the employer and workforce. Good safety professionals and trainers have to go beyond the OSHA and MSHA regulatory text to completely understand the rules. That is where preambles to the standards, interpretations, CPLs and consensus standards are needed. In 29 CFR 1910.269 Appendix E, OSHA lists consensus standards that, as the introduction to Appendix E states, can be helpful in understanding and complying with the requirements of 1910.269. One of the referenced...

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Train the Trainer 101: Understanding Grounding for the Protection of All Employees

I suspect that in the past 20 years the utility industry has grounded more circuits for the protection of employees than were ever grounded in the first 115 years of utility operations. Judging from the number of serious incidents and hazardous conditions created by temporarily grounding systems, it seems that we may not have understood all of the issues. It’s almost intuitive; grounding makes the work safer, but for whom? I once investigated a case in which an apprentice standing in a muddy right-of-way was grounding a truck to a pole bond and received a severe shock. A system fault many...

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4 Rules to Live By

Looking for an alternative to ground-to-ground and cradle-to-cradle? The method suggested here could be your answer. Georgia Power Company (GPC) has developed the 4 Cover-up Rules philosophy to train employees rather than requiring a ground-to-ground or cradle-to-cradle glove and/or sleeve rule. Every fatality in the last 89 years at GPC has been phase-to-ground contact or in-series with line-to-load on either primary or secondary voltages. GPC has not had a fatality on system or source voltages (feedback) since the 4 Rules of Cover-up were developed and implemented after the last fatality in...

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Why Single-Point Grounding Works

The pros and cons of single-point equipotential grounding, as opposed to working between your grounds or bracket grounding, has generated a lot of discussion. As found in IEEE-1048 Guide for Protective Grounding of Power Lines, single-point equipotential grounding is becoming more simply and accurately referred to as worksite grounding. In most cases, those who don’t trust worksite grounding don’t understand how or why it works. In fact, we have always been taught as linemen to “work between your grounds,” and that seemed like good advice. But it may not have been the...

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