Standard Specification for Standard Metric Sizes of Electrical Conductors
|Publication Date:||18 December 1981|
|ICS Code (Superconductivity and conducting materials):||29.050|
1.1 This specification prescribes the recommended standard metric sizes of solid round electrical conductors.
1.2 This specification prescribes the recommended standard metric size designations of stranded electrical conductors.
NOTE 1--The purpose of this specification is to provide logical geometrically progressive series of sizes for guidance to individuals and organizations preparing hard metric specifications for all types of round wire and stranded electrical conductors (see 3.1). The preferred sizes have been established to avoid proliferation of non-preferred sizes. They provide a series of sizes intended to be acceptable for most applications. The use of metric sizes will depend upon commercial factors, and their existence does not render obsolete existing specifications with inch-pound units as standard. This specification and hard metric conductor specifications prepared in accordance with it are not intended to replace any of the existing specifications having inch-pound units as the standard, with or without the inclusion of soft metric conversion (see 3.1.2).
NOTE 2--Physical properties, construction requirements, and manufacturing tolerances for specific products should be included in individual product specifications developed in accordance with appropriate sizes in this specification.
NOTE 3--Inch-pound units shown in the tables were calculated from the metric values and rounded, and are shown for information only.