First published in Australia in part as part of AS A31-1937.Redated 1941.AS A31-1941 revised and redesignated in part as AS A31.2-1963 and AS A31.3-1963.Second edition AS A31.2-1969.Second edition AS A31.3-1969.AS A31.2-1969 revised and redesignated AS 1841-1976.AS A31.3-1969 revised and redesignated AS 1842-1976.Second edition AS 1841-1983.Second edition AS 1842-1983.Third edition AS 1841-1985.Third edition AS 1842-1985.AS 1841-1985 and AS 1842-1985 revised, amalgamated and redesignated in part AS 1841.2-1992.First published in New Zealand in part as NZSS 1243:1962.NZS 2228 first published 1968.NZSS 1243:1962 and NZS 2228:1968 revised, amalgamated and redesignated NZS 4506:1978.AS 1841.2-1992 and part of NZS 4506:1978 jointly revised, amalgamated and designated AS/NZS 1841.2:1997.Second edition 2007. Originated in Australia in part as part of AS A31-1937. Revised and designated AS 1841-1976 and AS 1842-1976. Third edition 1985. AS 1841-1985 and AS 1842-1985 revised, amalgamated and designated, in part, as AS 1841.2-1992. Originated in New Zealand in part as NZSS 1243:1962. Final New Zealand edition NZS 4506:1978. AS 1841.2-1992 and part of NZS 4506:1978 jointly revised, amalgamated and designated AS/NZS 1841.2:1997. Second edition 2007.