D-72     For Primary Power Distribution Circuits 6900 to 10,000 volts.     A strong design, made for supporting heavy cables. Unusual mechanical strength coupled with great resistance to sudden temperature changes makes this type economical for heavy duty cable applications.
Voltage Rating _ _ _ _ _ _ 10,000 Volts Dry Flash-over _ _ _ _ _62,000 Volts Wet Flash-over _ _ _ _ _32,000 Volts Leakage Distance _ _ _ _ _ 8 3/4 in. Wet Arcing Distance _ _ _ _ 1 3/4 in. Diameter of Groove _ _ _ 1 or 1 1/2 in. Weight per Piece _ _ _ _ _ _ _ 37 oz. Packed in Boxes of _ _ _ _ _ _ 50 Weight per Box _ _ _ _ _ _ _ _ 139 lbs. Weight per 100, packed _ _ 278 lbs.

    Back of Hemingray design and manufacturing is a wealth of glass making experience. For over 50 years Hemingray Insulators have served the Public Utility industry in America and abroad, And now with a new and better glass Hemingray insulators, manufactured from a new and better glass, should find even greater fields of usefulness.