In-Service Insulator Photos
by Rob L. Dey
View insulators that are installed on electric utility poles and possibly still in use today. All of these photos were taken after November 2011 in New Jersey.
NOTE: All photos on this web site are copyright protected. Please contact the owner to reuse the images elsewhere.
Also, visit the Glass Insulator Collection
and the Porcelain Insulator Collection
1. Glass insulator collection on a pole! An aqua Brookfield 44 (CD 145) Beehive insulator (circa 1865-1921), an aqua Hemingray-42 (CD 154) insulator (circa 1921-1959), and a clear Whitall Tatum No. 1 (CD 155) insulator (circa 1922-1938) or Armstrong DP1 (CD 155) insulator (circa 1938-1969) on just half of one crossarm. The age of these insulators may be several decades apart from each other.
2. Some aqua Hemingray-40 (CD 152) glass insulators (circa 1910-1921).
3. Three aqua Hemingray-42 (CD 154) glass insulators (circa 1921-1959).
4. An assortment of aqua Hemingray-40 (CD 152) and Hemingray-42 (CD 154) glass insulators (circa 1910-1959) with both sharp and round drip points.
5. Four empty threaded insulator pins (wooden). One image includes an aqua Hemingray-40 (CD 152) glass insulator (circa 1910-1921) to show relative size.
6. A pair of clear glass (CD 155) insulators with corrugated bases, probably Armstrong DP1 (circa 1938-1969).
7. More clear glass (CD 155) insulators, Whitall Tatum No. 1 (circa 1922-1938) and/or Armstrong DP1 (circa 1938-1969). Notice the different color tints.
8. More clear glass (CD 155 and CD 160) insulators. Most of these insulators were made by Armstrong (DP1 and 14). Notice the different color tints.
9. Clear PLASTIC insulators! Four H. K. Porter 106932-W low-cost plastic insulators from the 1970's installed with wooden threaded bushings. The H. K. Porter 106932-S was designed for threaded steel pins without requiring a bushing. Specifications for both models are here.
10. Brown (Chance) porcelain cable insulators.
11. Brown (Locke) porcelain cable insulators.
12. White porcelain cable insulators. Two different brands of white porcelain insulators with RFI tops. These triple-petticoat insulators appear to be the most common type of insulator used in the southern half of the state (NJ).
13. Porcelain cable and glass signal insulator combination. Two white porcelain insulators with RFI tops and two clear glass Armstrong-14 (CD 160) insulators on the same crossarm.
14. Another porcelain cable and glass signal insulator combination. Brown (Chance) and clear (CD 155 and CD 160) insulators on a single pole.
15. Porcelain secondary rack and dead end insulators. Common white and brown 3-inch spools.
16. A broken aqua Hemingray-40 (CD 152 ) glass insulator (circa 1910-1921) with sharp drip points (SDP), still on the pole with both mating pieces recovered from the ground (see two pieces in upper left of the four shards shown).
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