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Proposed Specifications for Ground Sleeves
MATERIALS
RESIN - To be polyester thermosetting and tested for flammability under ASTM D635 with rating to be self-extinguishing and with extent of burning not to be over 12mm nor average time burning to be over eighty seconds on test.
FIBERGLASS used will be a combination of chopped glass with a minimum of one layer throughout of 18 ounce or 510 gram woven roving so as to form a continuous filament from top to bottom and from one side to the other for maximum strength.
GELCOAT – The exterior surface shall be coated with a polyester base gel coat or surface coat that will provide maximum protection from UV light and weathering. Test data results from DSET Laboratories using the EMMAQUA Test Method with the results of the equivalent of two standard ultra-violet light years showing no change in Fiber Show or Fiber Bloom and no worse than a “Good” rating on General Appearance and Color Change.
An alternate test for UV resistance can be the ASTM-G-70 test method with a maximum of change of 2.3 Macadam Units after one thousand hours of exposure in a Model 65WR Atlas Weatherometer.
PHYSICALS
Ground sleeves shall be manufactured in one piece and designed to nest within six inches or 152 mm of each other for suitable handling and storage. The base should have a flange measuring a minimum of 3 ½” or 89 mm to provide a stable base when the ground sleeve is installed. Edge rounding between the top surface and sidewalls shall have a radius of not less than ¼ inch or 6.35 mm not more than 5/8 inch or 12.7 mm. The ground sleeve should have no sharp or rough edges that might be harmful to cables.
The ground sleeve should be designed to withstand a drop of five feet or 1524 mm during handling and hard blows from a one-pound or 454 gram hammer without significant damage.
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