What is defined as equipment enclosed with a means of sealing to prevent access to live parts?

The correct choice, which is "Sealable Equipment," refers to equipment that is specifically designed to be enclosed in such a way that it can be sealed to prevent unauthorized access to live parts. This concept is crucial in the context of electrical safety, as it ensures that live components are inaccessible, reducing the risk of electrical shock or injury to individuals.

Sealable equipment typically includes features such as enclosures that can be locked or otherwise secured, ensuring that only authorized personnel can access the equipment when necessary. The definition aligns with the safety objectives outlined in the National Electrical Code (NEC), which emphasizes the importance of safeguarding electrical installations.

While other terms might be related to security or safety in electrical contexts, they do not capture the specific intent of providing a means to seal access to live parts. For instance, the notion of "Safety Equipment" is broader and could encompass various protective devices but doesn't specifically focus on the sealing aspect. Similarly, "Protected Equipment" and "Lockable Equipment" also imply some level of safety or security but lack the precise definition that encompasses the means of sealing to prevent access to live parts. Hence, "Sealable Equipment" stands out as the most accurate term in this scenario.