NEMA GR 1-2022 PDF

This technical publication applies to ground rod electrodes and ground rod electrode couplings that function in accordance with the National Electrical Code (NFPA 70-2020) and/or the National Electrical Safety Code (ANSI/IEEE C2-2023). Included are materials, construction, and performance of copper-bonded ground rod electrodes, zinc-coated ground rod electrodes, and stainless steel ground rod electrodes. This technical publication also includes information for electrode products that have been successfully used for many years but are not defined within the National Electrical Code or the National Electrical Safety Code. The items described in this technical publication are defined in Section 1.