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Porcelain Guy Strain Insulators

These were typically used to insulate a telephone or power pole guy wire from ground.  This was done to protect from inductance causing a charge on the wire as well as to prevent galvanic affects from corroding the guy wires and anchor.  These were also used to dead-end a circuit for relatively low voltage.  There is a huge variety of porcelain guy strains available from very tiny styles to large units.  There is not currently a hobby numbering system for these insulators.

Here are some sample porcelain guy strains from left to right:

  • Mottled brown marked "LOCKE"

  • Unmarked in a great gray-blue

  • Unmarked mottled brown

  • gray dry process marked "K C No 1"

  • Light blue marked "NP"

Here are some sample porcelain guy strains from left to right:

  • Unmarked mottled brown 

  • Unmarked dark brown

  • Reddish  brown marked "WHITES / 503"

  • Green with an incuse hand logo

  • brown dry process embossed "Square D" (D in a square)

  • Green marked "B.I.C.C.Ltd. / REG No. 639667-1914 // J. M. & Co. / MADE IN ENGLAND"

 

 

 

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