NSAI ETC TC 3 Power Installations exceeding 1 kV a.c. (1,5 kV d.c.)
NSAI ETC TC3 is the Technical Committee responsible for preparing national installation standards for High Voltage power installations (exceeding 1 kV a.c. or 1,5 kV d.c.) located indoors or indoors, including earthing. The standard specifies the design requirements of the installation, and the selection and erection of electrical equipment in order to ensure the safety of persons and the proper operation of the installation. The installation standard is not applicable to factory built and type tested equipment, but is relevant to the installation of this equipment. The installation requirements are not applicable to overhead and underground lines between separate installations. Thus the work of the committee is analogous to the work of NSAI ETC TC2 ‘Electrical Installations’ which develops and maintains the requirements for installations connected at low voltage. The two committees co-ordinate closely on interface issues.
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