IEEE C39.1-1959
ASA American Standard Requirements for Electrical Indicating Instruments Panel, Switchboard, and Portable Instruments
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About This Item
C39.1-1959 is an inactive American standard that sets out requirements for electrical indicating instruments used on panels, switchboards, and portable equipment. The document focuses on the construction and performance expectations for instruments that measure or display electrical conditions in power and industry applications. By defining common requirements for these devices, it helps support more consistent design, testing, and procurement of indicating instruments used in electrical systems.
C39.1-1959 overview
This technical standard addresses the requirements for electrical indicating instruments in panel, switchboard, and portable formats. Its scope suggests attention to how instruments are built, marked, and evaluated for practical use in electrical measurement environments. For organizations working with legacy equipment or historical specifications, C39.1-1959 provides a reference point for comparing instrument characteristics and aligning product expectations. It is especially relevant where consistent indication and dependable electrical performance are important.
Typical use cases
The standard is typically relevant to instrumentation used in control panels, switchboard assemblies, and portable test or measuring devices. It may apply where operators need clear electrical indication in power distribution rooms, industrial plant systems, utility installations, or maintenance workflows. Because the subtitle specifically covers electrical indicating instruments, it is most useful for equipment intended to show measured values rather than advanced digital processing. C39.1-1959 can help guide selection and evaluation of legacy analog-style instruments.
Why this standard matters
In practice, this standard matters because electrical indicating instruments must provide reliable readings and consistent behavior across different installations. A clear requirements document helps reduce variation in design, supports compatibility during procurement, and can simplify inspection or acceptance testing. For older panel and switchboard equipment, C39.1-1959 may also be useful when assessing replacement instruments or maintaining historical systems. Using a defined technical baseline can help limit risk and improve confidence in measured electrical values.
- Panel, switchboard, and portable instrument scope
- Electrical indication and measurement context
- Legacy requirements reference
- Design and testing consistency
- Procurement and replacement alignment
- Publication Date: 1959
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Components, Circuits, Devices and Systems; Power, Energy and Industry Applications; Fields, Waves and Electromagnetics
- Official IEEE: Doi link
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