BS 6811-4.1(1991) : 1991

Lays down the general requirements of enamelled rectangular copper winding wires. Covers normative references, definitions and general notes on methods of test, dimensions, electrical resistance, elongation, springiness, flexibility and adherence, heat shock, cut through, resistance to abrasion, resistance to solvents, breakdown voltage, continuity of insulation, temperature index, resistance to refrigerants, solderability, heat or solvent bonding, dielectric dissipation factor, resistance to transformer oil, loss of mass, high temperature failure and packaging.