Power fittings are metal components used in power transmission and distribution systems to connect, fix, and protect conductors and insulators. They fall under the sub-sector of the "Electrical Equipment" category within the power industry. According to the *National Industrial Classification of Economic Activities* (GB/T 4754-2017), they belong to the sub-category "Power Fittings Manufacturing" within "C382 Power Electronic Components Manufacturing".
Design Selection Basis: For example, compression-type tension clamps must be used for 500kV line tension sections (according to Clause 6.0.9 of GB/T 50545-2010 *Design Code for 110kV~750kV Overhead Transmission Lines*).
Quality Control Standards: National standards provide quantitative regulations for key parameters such as galvanized layer thickness and breaking load (e.g., galvanized layer ≥86μm, GB/T 2694-2018).
International Compliance Requirements: Chinese standards achieve a 90% compliance rate with IEC 61284 (International Electrotechnical Commission), facilitating equipment interoperability in "Belt and Road" projects.