Spool insulators

EHAP Revision Series, Part 3: Switching Devices, Support and Other Utility Hardware

This is a continuation of the discussion of the electrical-system equipment found along distribution lines. One of the requirements for arborists working in proximity to an electrical hazard – within 10 feet of the lines – is familiarity with the equipment that shares the poles with the lines. The electrical-system equipment can be divided into […]

Voltage generated at the power plant

Electricity and the Utility Industry

Electricity is such an integral part of our daily lives that we take it for granted. We flip the switch on the wall, and the lights come on. We give no thought about where it came from or how. But to safely work around overhead power lines, it is essential that arborists understand the basics […]

Tree-Work Safety by the Numbers

Mathematics is not a field that sparks much interest among tree workers – or people in general. But the field of probability plays a role in just about everything tree workers do. If you knew that the odds of being severely injured performing a specific task were one in five, you might approach it with […]

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