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What is UL 60947-1:2020?

UL 60947-1:2020 is an international standard that specifies the general rules for low-voltage switchgear and controlgear assemblies. It was developed by Underwriters Laboratories (UL), a globally recognized safety certification organization. This standard provides guidelines for the design, construction, testing, and performance of switchgear and controlgear assemblies to ensure their safe and reliable operation.

Understanding the Scope of UL 60947-1:2020

The scope of UL 60947-1:2020 covers switchgear and controlgear assemblies with rated voltages not exceeding 1000 volts AC or 1500 volts DC. It applies to both indoor and outdoor installations in various industrial and commercial settings. The standard also considers the environmental conditions, such as temperature, humidity, and altitude, to which these assemblies may be exposed.

UL 60947-1:2020 applies to switchgear and controlgear assemblies used for electrical power distribution, motor control, and other industrial applications. This includes assemblies used in machinery, buildings, power generation, and renewable energy systems. Compliance with this standard ensures that these assemblies meet specific safety, performance, and reliability requirements, minimizing the risk of electrical hazards and equipment malfunctions.

Key Requirements of UL 60947-1:2020

To comply with UL 60947-1:2020, switchgear and controlgear assemblies must undergo rigorous testing and assessment. Some key requirements of this standard include:

Clear markings and labeling: Assembly components should be appropriately labeled with essential information, such as ratings, warnings, and manufacturer details. This facilitates easy identification and maintenance.

Protection against electric shock: The design and construction of the assemblies should ensure protection against direct and indirect contact with live parts, safeguarding users from electric shock hazards.

Thermal withstand capabilities: Switchgear and controlgear assemblies must be able to withstand the thermal stress associated with their rated currents and ambient temperature conditions.

Mechanical strength and durability: Assemblies should be mechanically robust to withstand mechanical stresses during normal operation, transportation, and installation.

These requirements, along with many others specified in UL 60947-1:2020, aim to provide a comprehensive framework for ensuring the safe and reliable operation of switchgear and controlgear assemblies.


UL 60947-1:2020 is an international standard that plays a crucial role in ensuring the safety and performance of low-voltage switchgear and controlgear assemblies. Compliance with this standard offers numerous benefits, including reduced risks of accidents, electrical hazards, and equipment failures. By adhering to the guidelines outlined in UL 60947-1:2020, manufacturers can design and construct assemblies that meet stringent safety requirements, instilling confidence in end-users and regulatory authorities.



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