Ground Wire Insulator Tubes

Ultimate Protection with Ground Wire Insulator Tubes.

PUPI® fiberglass ground wire insulator tubes are made of high performance pultruded fiberglass to provide superior ground wire isolation and dielectric protection. Protected by SunGUARD® UV coating, our ground wire insulator tubes offer the same three levels of UV and weathering protection as PUPI tangent and deadend crossarms.


Ground wire insulator tubes are available in 10’ length increments and can be cut on-site to meet specific customer needs.

GEOTEK Pultruded Fiberglass Properties

Tensile Strength:ASTM D3916120,000psi*
Flexural Strength:ASTM D4476140,000psi
Flexural Modulus:ASTM D44764.5 x 106psi
Impact Strength:ASTM D25635 ft-lb/inch notch
Dielectric Strength:
Perpendicular (1/4" thick)ASTM D149254 volts per mil
Parallel:ASTM D149167 volts per mil
Specific gravity: ASTM D7921.86
Water absorption:ASTM D570 0.60% max.
Color:Grey or Brown --
* Note: Tensile strength is lower than flexural strength due to difficulty in clamping rod ends to fully load all fibers in tension.
Product Details
Length240" (other lengths available)
Outside Diameter1"
Inside Diameter0.688"
Weight0.35 lb/ft
UV Resistantbonded SunGuard® polyurethane coating
Electricalnon-conductive, high dialectic strength

Can be attached to the pole with molding or cable guard straps.

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