IEEE C39.1-1955
ASA American Standard Electrical Indicating Instruments Panel, Switchboard, and Portable Instruments
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- Language: English
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About This Item
C39.1-1955 is a superseded English standard for ASA American Standard Electrical Indicating Instruments covering panel, switchboard, and portable instruments. It is relevant to electrical measurement equipment used in power and industrial applications, where consistent indication, construction, and rating practices matter. For engineers, buyers, and compliance teams, this technical document helps define the expectations for instruments that monitor electrical quantities in installed panels, control boards, and portable test or indicating applications.
About C39.1-1955
This standard addresses the technical requirements for electrical indicating instruments in panel, switchboard, and portable formats. In practice, that means it is tied to how these instruments are identified, designed, and evaluated for use in electrical systems. C39.1-1955 is useful when comparing legacy equipment or reviewing historical specification language for instrumentation intended to provide readable electrical measurements in controlled installations and field-oriented portable use.
Where is C39.1-1955 used?
C39.1-1955 would typically be used in settings where electrical indicating instruments are installed on switchboards, control panels, or carried as portable devices for measurement and monitoring. That includes power stations, industrial plants, and electrical distribution or testing environments where operators need clear indications of system conditions. The standard is especially relevant when selecting instruments for legacy equipment, replacement planning, or documentation that references older ASA-era requirements.
Importance in practice
In practice, C39.1-1955 supports consistency in how electrical indicating instruments are specified and understood. For legacy systems, it can help reduce procurement mistakes, improve compatibility, and provide a common reference point for design and inspection. It may also assist with testing and acceptance by clarifying what kind of instrument performance and construction expectations apply to panel, switchboard, and portable devices used in electrical monitoring tasks.
- Panel, switchboard, and portable instrument scope
- Electrical indicating equipment for measurement and monitoring
- Legacy ASA-era technical reference
- Relevant to power and industrial applications
- Useful for specification, review, and replacement planning
- Publication Date: 1955
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Components, Circuits, Devices and Systems; Fields, Waves and Electromagnetics; Power, Energy and Industry Applications
- Official IEEE: Doi link
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