ES 95400 is an engineering standard issued for the two brands that form the Korean group, and the dual attribution is the significant feature: a component qualified against it can be supplied to a programme of either brand without repeating the electromagnetic assessment, which reduces the cost of a common platform. In practice the two brands nevertheless issue their own component specifications, so the standard provides the shared technical requirement while the specification defines which parts of it apply to a particular component and which additional requirements the brand imposes. The subject range in which the number sits groups it with other documents covering the electrical and electronic installation, and the trailing digits identify the revision. A supplier should obtain the standard together with the brand's specification rather than relying on either alone.