The Importance of Cluster Bars While Performing De-Energized Line Maintenance

Posted by Joseph Cardona on Mar 17, 2021 8:00:00 AM

To maintain worker safety while performing de-energized and grounded line maintenance, two important factors must be accomplished in the event of a fault:

  1. The fault current must be cleared in the fastest available time
  2. The current across the line worker must be limited to a safe level by creating an Equi-Potential Zone (EPZ)


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Topics: Lineman Grade Tools, Temporary Grounding

Tools in the Toolbox to Minimize Bird-Caused Outages

Posted by Cindy Kemper on Mar 4, 2021 8:00:00 AM

Birds have no doubt been interacting with power lines and substations since the latter first appeared on the landscape. Indeed, the first record of avian collision mortality from power lines dates back to the late 1800’s, and at least one record of electrocution in North America was made as early as 1922. These incidents occur when a bird simultaneously contacts two energized components of a pole that are each at different electrical potential (referred to as a phase-to-phase fault or electrocution), or they simultaneously contact one energized component on a structure and one grounded component (referred to as a phase-to-ground fault or electrocution). These incidents not only cause injury or mortality to the birds themselves, most of which are legally protected, but they also impact the integrity of the power system.

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Topics: Wildlife Mitigation

Personal Protective Ground Set Care and Maintenance

Posted by Joseph Cardona on Feb 19, 2021 8:00:00 AM

CHANCE® Personal Protective Ground Sets are an important tool for lineworkers to use during de-energized line maintenance. The ground sets serve two purposes; one is to provide an Equi-Potential Zone (EPZ) minimizing current flow through a lineworker and the second is enabling the clearing of the fault in the fastest available time. In order to make sure the personal protective ground sets will function properly during daily use, daily inspection and periodic testing must be performed.

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Topics: Lineman Grade Tools

Greenjacket Creates Custom Wildlife Mitigation Solution to Save Baby Owls

Posted by Cindy Kemper on Jan 29, 2021 9:42:33 AM

Although we are just starting out the new year and snow is covering the ground in much of the USA and Canada, tis’ already the season for romance and courtship for great horned owls, the largest owl in North America, and one of the earliest “spring” nesters. These majestic birds aren’t much for construction or renovation, and instead take over old nests of other birds such as crows and red-tailed hawks. To the frustration of many utilities, they sometimes choose old nests in electrical substations as their chosen spot to raise a family; these substations offer protection from the elements, a heat source (important when incubating eggs, sometimes in temperatures of -30C), and protection from most mammalian predators, thanks to the chain-link fencing. What they don’t realize is the high electrocution potential for themselves and their clumsy fledging young.  

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Topics: Wildlife Mitigation

Reducing Hazards of Step and Touch Potential

Posted by Joseph Cardona on Dec 28, 2020 2:00:00 PM

What is Step and Touch Potential?

While performing energized or de-energized line work, there are many opportunities for a line worker to encounter differences in electrical potential. Opportunities could include working near bucket trucks, underground gear, overhead switches, or in substations. When a difference in potential occurs across a worker’s body, current begins to flow. This current flow can be very hazardous as it only takes 50 to 60mA to become possibly lethal. These differences in potential can be categorized as step and touch potential. Step potential is defined as a difference in electrical potential between a worker’s feet and touch potential can be between a worker’s hands or hands and feet.

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Topics: Lineman Grade Tools, Safety

Guy Deadends for High Tension Terminations

Posted by Jim Smith on Dec 16, 2020 2:00:00 PM

Guy deadends are the connection between guy wire and anchor in a down guy application and must be sufficiently strong to exceed the rated breaking strength of the strand. A one-half inch diameter guy strand rated for 26,900 pounds is considered the threshold from distribution to transmission guying that would require a high-tension guy.

Hubbell Adjust-A-Grip® guy deadends offer the ease of installation and the performance that is critical for high tension terminations associated with transmission towers and antenna structures.

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Topics: Construction

Primary vs. Secondary Protection For Rubber Gloving or Hotsticking

Posted by Joseph Cardona on Nov 11, 2020 7:00:00 AM

Energized line maintenance is a popular option for working on power lines. Two common methods for hot work include rubber gloving and hotsticking. These two work methods will utilize both primary and secondary levels of protection from energized lines and equipment. Live line barehand is another work method for working on energized lines and equipment but will not be discussed in this blog. This blog will discuss the differences between primary and secondary protection while using the rubber gloving or hotsticking work methods.

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Topics: Lineman Grade Tools

Asset Management Planning for Wildlife Outage Mitigation Planning

Posted by Darren Barnett on Oct 21, 2020 2:00:00 PM

What should utilities do in a situation where they are having an animal-caused outage issue and do not know where to start when they are planning to install a new substation?

An animal-caused outage mitigation mindset must exist within all levels of a utility’s asset management process in order to completely manage the issue (see Figure 5). Utilities need to look internally to all of their processes to understand where there are examples of practices that work well and should be reinforced and also recognize areas of opportunity. Detailed in this section is a high-level review of the areas that should be reviewed, analyzed, understood, improved upon or implemented, when necessary, to support the drive toward zero animal-caused outages.

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Topics: Wildlife Mitigation

What Training Do Linemen Need Today and Considerations For Your Line Crew

Posted by CHANCE Lineman Grade Tools on Oct 16, 2020 10:00:00 AM

There are few jobs that are more dangerous than that of a utility lineworker. A commitment to safety is of utmost importance, both in the design of tools and equipment and in the training given to understand how to use them properly.

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Topics: Lineman Grade Tools

5 Things to Consider When Selecting an Underground Enclosure

Posted by Bryan Hunley on Oct 13, 2020 6:00:00 AM

There are many choices and considerations with regards to deploying OSP broadband infrastructure today. Determining what type of underground enclosures to support that infrastructure can seem overwhelming with all of the solutions offered by multiple manufacturers. This article will help provide guidance on navigating through some of those product selection choices.

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Topics: Communications, Enclosures