ProcessKumwell ground rods
are made by special process, molecular bonding purity electrolytic coating of copper 99.9 % deposited over a layer of nickel onto high tensile and low carbon steel cores to ensure a perfect and even bonding between the steel and copper. Kumwell ground rods has a copper layer whose minimum thickness is 254 micron met IEC 62561-2, TIS 3024-2 and UL standard can resistance a severe corrosion to acidic and high concession of salt environment for long lifetime up to 40 years Standard size diameters being commonly used are 1/2″, 3/4″, 5/8″ and 1″. Standard lengths being commonly used are 4′ to 10′. Thread type ground rods are available for extensible the length of ground rods by coupling In addition, Kumwell has another ground rod type such as solid copper and stainless steel (316L).Standard Test and Inspection
Kumwell ground rod test and inspection follow by international standard UL 467 , IEC 62561-2 and Thai Industrial Standard (TIS) 3024-2.