- Item 74835 - Break-strain insulator, ca. 1915
- Contributed by Maine Historical Society
- Item 74835
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- *Credit line must read: Collections of Maine Historical Society
This strain insulator, used on the support structures for overhead electric railway lines, was found in the Rockland area.Show Details
Strain insulators are used on guy wires supporting utility poles or radio antennas to break the electrical path and prevent short circuits or grounding.