NFC 31 657 : 1988
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES - POLYIMIDE ENAMELLED ROUND COPPER WINDING WIRE, CLASS 220
01-07-1995
12-01-2013
Specifies the requirements of enamelled round copper winding wire of class 220 with a sole coating based on polyimide resin. Covers the following range of nominal conductor diameters: 0,020 mm up to and including 2,000 mm (Grade 1); 0,020 mm up to and including 5,000 mm (Grade 2). Coverage includes dimensions, electrical resistance, heat shock, break down voltage, loss of mass, and high temperature failure.
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