The purpose of this recommended practice is to define a voltage endurance test method for use on insulated, form-wound bars and coils for installation in large rotating machine stators. These voltage endurance tests may be applied to representative specimens of form-wound, insulated bars and coils for either new machines or machines to be rewound. The intent of this document is to define the specimen, the associated testing equipment, and the procedure for performing these voltage endurance tests. Specific numerical values for acceptable voltage endurance lifetimes are not recommended at this time. The voltage and temperature of the test, the minimum acceptable lifetime, and the number of specimens to be tested should be established prior to testing (see 7.5).