TS 4740

TS 4740 is an electrotechnical terminology standard for the electrical installations of buildings. Standards of this kind help designers, installers, inspectors, and technical writers use the same concepts with the same meaning, reducing ambiguity in specifications, drawings, and maintenance documentation. Its core value is the shared language of installation engineering rather than the installation hardware itself.

Technical subjects covered by the vocabulary

According to its scope, the standard covers definitions for terms related to installation characteristics, voltages, electric shock, earthing, electrical circuits, conductor and cable systems, and other associated materials. In practice, this means it organizes the fundamental vocabulary used to describe building electrical installations, not just individual components. That distinction matters because the same word can be used differently across design, construction, and operation unless the terminology is fixed.

From a general technical perspective, building electrical installations combine power distribution, protective measures, circuit arrangement, routing of conductors, and earthing arrangements. Clear definitions for concepts such as voltage and electric shock are especially important for safety-related communication and engineering consistency. A common terminology for conductors and cables also supports correct material selection, installation detailing, and maintenance work.

This record is based on IEC 50/826:1982 equivalence and is marked as withdrawn. Its practical significance lies in vocabulary harmonization: it helps professionals interpret and exchange terms used in the field of building electrical installations, rather than specifying a test method or a numerical performance requirement.