IEEE C37.20.2a-2020
Clad Switchgear—Amendment 1: Control and Secondary Circuits and Devices, and All Wiring
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About This Item
C37.20.2a-2020 is a superseding amendment for clad switchgear, focused on control and secondary circuits, devices, and all wiring. It is relevant where electrical assemblies depend on orderly circuit arrangement, dependable device integration, and clear wiring practices. For engineers, buyers, and maintenance teams, this technical document helps define the expectations around secondary systems within clad switchgear, supporting safer installation, more consistent build quality, and more reliable operation in power and industrial applications.
C37.20.2a-2020 overview
This standard amends the C37.20.2 family by addressing the control and secondary circuit details that support clad switchgear performance. In practice, that means attention to wiring methods, connected devices, and the internal circuitry used for control, indication, protection, and related functions. C37.20.2a-2020 is useful when evaluating how secondary wiring and device arrangements should be organized to support consistent design, inspection, and compliance within medium-voltage switchgear applications.
Typical use cases
This standard is commonly used when specifying or reviewing clad switchgear for utility, industrial, and large facility power systems. It can apply to projects involving relay and control wiring, terminal arrangements, interconnections between protection devices, and internal panel circuitry. C37.20.2a-2020 may also be referenced during equipment procurement, factory acceptance checks, and maintenance planning where secondary circuits must be documented, installed correctly, and kept consistent with the intended switchgear configuration.
Why this standard matters
Clear requirements for control and secondary circuits help reduce wiring errors, improve maintainability, and support safer switchgear operation. C37.20.2a-2020 matters because secondary systems often affect protection, monitoring, and control performance even when the primary power path is unchanged. Using a defined standard can improve comparison between products, support technical review, and reduce risk during installation or servicing. For superseded documents, it also helps users identify the exact historical basis for existing equipment.
- Clad switchgear secondary circuit requirements
- Control wiring and device arrangements
- Documentation for inspection and review
- Support for procurement and compliance checks
- Publication Date: 2020
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Components, Circuits, Devices and Systems; Power, Energy and Industry Applications; Robotics and Control Systems
- Official IEEE: Doi link
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