IEC 60512-1:2018 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60512-1:2018 is intended to be used as a basis for tests and measurements specifications for electrical connectors. It provides guidance and reference for tests and measurements within the IEC 60512 series. It includes the description and the practice of the various phases of tests and measurements (preparation, tests and measurements, requirements, documentation), in addition to basic terms and definitions applicable to any part of the IEC 60512 series. This standard shall be used in conjunction with IEC 60512-1-101 and relevant part(s) of series IEC 60512. Part 60512-1-100 provides the list of the existing test and measuring methods published within series IEC 60512. Detail tests and measurements specifications are applicable to electrical connectors and their components (e.g. connector inserts, connector housings, locking mechanisms, contacts and terminations) within the scope of technical committee 48. They may also be used for similar devices when specified in a detail product specification. Detail tests and measurements specifications are used in conjunction with detail product specifications which prescribe the tests to be used, the required degree of severity for each of them and the permissible performance limits. The detail product specification also specifies the deviations in procedures, which may be required when applying a test to the type of connector or its component under consideration, and it further specifies any special procedures which may be required. This fifth edition cancels and replaces the fourth edition, published in 2001. It constitutes a technical revision. This edition includes the following main technical changes with respect to the previous edition: – in Clause 3, only terms relating to the testing are defined, and IEC 61076-1 is referred to for terms of connectors. – Clause 4 (Numbering of tests and measurement specification) is added. – Subclause 5.1.2 (Calibration) is added. – in Clause 6 (Test), test procedure follows IEC 60068-1. Key words: Connectors, Test Specification