What is defined as all apparatus, machines, conductors, etc., used in an electrical installation?

The term that encompasses all apparatus, machines, conductors, and related components used in an electrical installation is referred to as "Equipment." This term is broadly applicable, as it includes not just static installations but also dynamic elements involved in the functioning of electrical systems.

When discussing electrical installations, "Equipment" involves everything needed for the generation, transmission, and distribution of electricity, as well as components that operate under electrical influence. This can range from transformers and switchgear to conductors and protective devices. The inclusiveness of the term allows for a comprehensive understanding of what is needed for effective performance and safety in any electrical installation.

Other terms like "Infrastructure," while relevant to the physical and organizational structures needed for the operation of a system, do not specifically denote the actual apparatus and machines. "Installation" pertains more to the process of setting up these systems rather than what is included in them, and "Machinery" is narrower, typically referring specifically to mechanical devices, rather than the entire range of electrical apparatus required in a setup. Thus, "Equipment" is the most accurate and encompassing term for defining all necessary components in an electrical installation.