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Harmonizing AWG and kcmil Sizes in IEC Standards: A Comprehensive Approach

This technical report by Ken Bow outlines a three-step process to integrate American Wire Gauge (AWG) and kcmil sizes into the IEC system, recommended by Study Group 60228. It details the resistance and dimensions of various conductors, including metric cross-sections, emphasizing the need for a single harmonized standard recognized by IEC TC 20. The report describes a long-term project aiming to develop a new standard that rationalizes conductor sizes, ultimately benefiting global consistency and ease of use in electrical conductors.

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Harmonizing AWG and kcmil Sizes in IEC Standards: A Comprehensive Approach

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  1. IEC Report to E10D-Fall 2008 Presentation by Ken Bow

  2. IEC Technical Report TR6XXX • Conductors of Insulated cables - Data for AWG and kcmil Sizes • Step 1 of a 3 step process • Recommended by Study Group 60228 • Means of introducing “AWG” sizes into the IEC system • Provides resistance and dimensional detail including metric cross-sections

  3. Driving Forces • IEC TC 20 recognizes need to produce a single harmonized standard • Not intended for data cable, communications cable or winding wire • AWG Sizes: 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2, 1 • 1/0, 2/0, 3/0, 4/0 • Kcmil sizes:250, 350, 500, 750, 1000, 1250, 1750, 2000

  4. Procedure • Stage 1: Produce TR with a range of AWG/kcmil conductors (24 AWG to 2000 kcmil) • Stage 2: Develop TR into IEC Standard/Align with IEC 60228 • Stage 3: Produce new standard with a single rationalized range of conductor sizes (by 2020) • Long term project

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