Define the term "dual rated" as it pertains to electrical equipment.

The term "dual rated" in the context of electrical equipment refers specifically to equipment that is designed and rated for use with both alternating current (AC) and direct current (DC) systems. This characteristic allows the equipment to function effectively and safely in both types of electrical systems, making it versatile for various applications in industry and residential settings.

This dual capability is crucial for many electrical devices since AC and DC circuits have different properties and characteristics. For example, different components might react differently to these types of current, and having equipment that can handle both provides greater flexibility for installation and usage.

The other choices touch on different specifications and suitability of electrical equipment but do not define "dual rated" accurately. Equipment operating at varying temperatures, being suitable for both residential and commercial applications, or being safe for both indoor and outdoor use address other important ratings or approvals but do not encompass the essence of being rated for both AC and DC operation.