The Squirrely: Transformer Bushing Guard

The Squirrely: Transformer Bushing Guard

The Squirrely: Transformer Bushing Guard: HJA-700 | Overhead transformer squirrel, bird and wildlife protective guard

Wildlife, Squirrel, & Bird Guard used on the primary bushing of a secondary transformer

Part#: HJA-700 | Click here to download the Squirrely brochure

There’s a fast, inexpensive, and safe way to prevent outages caused by squirrels, birds and rodents without de-energizing at the transformer.

The Squirrely is a specially designed small-animal guard, and we’ve insulated the stinger an extra 10-12 inches from secondary transformer bushings.







  • • Highly effective in preventing electrical outages caused by squirrels and birds
  • • Can be installed while the service is still energized
  • • Easily installed with any style of shotgun
  • • UV protected for extended life
  • • Can be installed by 1 person on the ground using a telescoping hot stick with the Squirrely Installation tool HJA-700-100


Height: 12″

Insulator Size: For use on insulator up to 3 7/8

Environmental: -35° to 150° operation

Material: UV resistant molded polypropylene copolymer, sky gray color

ASTM standards met/exceeded: ASTM G-23-69 1000 hour accelerated aging test & ASTM D475 tracking test.

How to Install the Squirrely:


Outages Caused by Squirrels:

“I don’t think paralysis [of the electrical grid] is more likely by cyberattack than by natural disaster. And frankly the number-one threat experienced to date by the US electrical grid is squirrels.” – John C. Inglis, Former Deputy Director, National Security Agency 2015.07.09

As told to The Washington Post, The American Public Power Association, a group representing municipal electric utilities, says that squirrels are the most frequent cause of power outages in the U.S., although it notes that squirrel-induced outages typically affect fewer people than outages caused by storms. “Squirrels remain the biggest wildlife nemesis because of their sheer numbers and smarts,” the story concluded. See article.

A recent incident in the Cyber Squirrel database happened on January 2 in Wagoner, Oklahoma. A squirrel touched grounded wire at an electric substation, knocking out power for a portion of the town for five hours.

Map of power outages caused by Squirrels in 2015

Squirrely Installation Tool:

The Squirrely Installation Tool (Part Number: HJA-700-100) attaches to any hot stick with a universal end.

Every 500 Squirrelies purchased receives a free Squirrely Installation Tool! 

Squirrely Application Tool - PN: HJA-700-100

Tags: squirrley, squirrly, squirley, squirely, squirly




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