Grounding Products and Systems - Elec.ru

Grounding Products and SystemsTechnical Section2.2 PlatingThe zinc coating will be hot dipped galvanized inaccordance with ASTM A153-78.2.3 Finishing – ground rods shall be free of seams, slivers andother injurious defects.2.3.1 Diameter and Permissible Variations:Rod Size InchDiameter Tolerance (Inch)1/2” +.010-.0205/8” +.010-.0303/4” +.010-.0301” +.010-.0302.3.2 Length and Permissible Variations:Rod Size Inch Length (feet) Length Tolerance (Inches)1/2” 5, 6 +/- 15/8” 6, 8 +/- 33/4” 6, 8, 10 +/- 31” 8, 10 +/- 32.3.3 Machining:Standard rods are conical pointed to 60 degrees onone end and are cut square and chamfered at theother end.ERITECH ® Chemical Ground RodsHow to Specify a Chemical Ground RodThe chemical ground rod shall be UL Listed to UL 467. It shalloperate by hygroscopic extraction of moisture from the air toactivate the electrolytic process to improve performance. Theground rod can be 100% self activated or initiated with theaddition of water at time of installation. No additional water shallbe required thereafter for the life of the system.The ground electrode shall come in a kit, complete with all thecomponents required to complete the installation. The electrodeshall be constructed of copper tube with an internal diameternot less than 50.8 mm (2") and a wall thickness not less than2.0 mm (0.08").The tube shall be permanently capped on the bottom and have aremovable cap on the top. The UL nameplate shall appear on thetop cap. Air breather holes shall be provided in the top cap anddrainage holes shall be provided along the length of the tube fordrainage of electrolyte solution into the surrounding soil.The ground electrode shall be a minimum of 10’ long for verticalinstallations or for a horizontal (L shaped) installation be of no lessthan 10’ on the horizontal with an access segment of 32" vertical2.4 Marking of RodsEach rod is imprinted within 12" of the top of the rod with:manufacturer logo, and part number indicating rod diameterand length.2.5 PackagingGround rods shall be packaged in bundles with reinforcedtape or metal banding and then bound securely in steelstrapped master bundles.Rod Size Bundle Quantity Master Bundle Quantity1/2” 10 1005/8” 10 1003/4” 5 501” 1 253.0 ReferencesNational Electrical Manufacturers Association NEMA 8CC-5/GR-1ASTM A-36 for steelASTM A153-78 for platingANSI C135.30 – 1979RUSlength. Where the requirement is for a length greater than 20’,the sections shall be in segments of 10’.There shall be a copper pigtail wire of not less than 4‘ in lengthpermanently attached to the side of the tube via CADWELD ® . Thetube shall be pre-charged with salts of Calcium and Sodium inequal proportions. Bentonite clay shall be included in sufficientquantity to be placed around the bottom of vertically installedrods and around the horizontal section of L-shaped rods.A permanent, stable, high conductivity, back-fill material that ishygroscopic in nature and will not shrink, contract or separatefrom the electrode due to loss of ambient soil moisture shall beprovided in sufficient volume to fill the rest of the hole for thevertical installation and around the horizontal and vertical sectionsof the L-shaped rod. This material shall be a highly conductivecompound composed of chemically stable materials includinghydraulic cement, high quality calcined carbon and rheologicaladditives.An inspection well shall protect the chemical rod, while allowingnecessary air and moisture to enter. It shall open easily forinspection and future recharging if required.70 Ph: 1-800-677-9089www.erico.com