IEEE 4-1942

4-1942 is a superseded English standard titled AIEE American Standards for Measurement of Test Voltage in Dielectric Tests. It defines a technical basis for measuring test voltage during dielectric testing, helping engineers apply consistent methods when evaluating insulation and related electrical materials. As a historical reference standard, 4-1942 is useful for understanding earlier practice in power, energy, and engineered-material applications where reliable voltage measurement directly affected test results and interpretation.

About 4-1942

The purpose of 4-1942 is to provide guidance for measuring the voltage used in dielectric tests, with particular relevance to insulation assessment and other high-voltage laboratory or factory test conditions. Because test voltage measurement can influence whether a material or component appears to meet requirements, the standard helps define a more consistent technical approach. In that sense, 4-1942 supports clearer comparison of results across equipment, test setups, and engineering organizations working with dielectric performance.

Where is 4-1942 used?

4-1942 is most relevant in settings that perform dielectric testing on electrical components, insulating materials, and related apparatus. That may include laboratories, test departments, and engineering groups involved in power equipment, circuits, or device qualification. It is also useful where test voltage must be measured under controlled conditions to support design evaluation, material screening, or acceptance testing. The standard’s focus suits workflows where insulation behavior and voltage accuracy are central to the test outcome.

Importance in practice

In practice, 4-1942 matters because dielectric test results depend heavily on how the applied voltage is measured. Consistent measurement methods help reduce ambiguity, improve repeatability, and support fair comparison between test reports. For procurement, design control, and compliance work, this kind of technical reference can lower the risk of misinterpretation when insulation or high-voltage performance is being assessed. As a superseded standard, it also has value for reviewing legacy specifications and older test documentation.

• Dielectric test voltage measurement
• Insulation and materials evaluation
• High-voltage test consistency
• Legacy AIEE technical reference