IEC/TS 63527 Ed. 1.0 en:2025

IEC TS 63527:2025 Applicable to the safe management and operation (3.1.2) of and work activity
(3.4.1) on, with, or near electrical installations operating at voltage levels from, and including,
extra-low voltage up to and including high voltage.
This latter term includes those levels commonly referred to as medium and extra-high voltage.
These electrical installations are designed for the generation, transmission, conversion,
distribution and use of electrical power. Some of these electrical installations are permanent
and fixed, such as a distribution installation in a factory or office complex. Others are temporary,
such as on construction sites, and some are mobile or capable of being moved either whilst
energized or whilst not energized nor charged, examples are electrically driven excavating
machines in quarries or open-cast coal sites.
This document sets out the requirements for the safe management and operation (3.1.2) of and
work activity (3.4.1) on, with, or near these electrical installations. The requirements apply to
all operational, working and maintenance procedures. They apply to all non-electrical work
(3.4.3) such as building work near to overhead lines or underground cables as well as electrical
work (3.4.2), when there is a risk (3.1.3) of electrical danger (3.1.5).
This document does not apply to ordinary persons (3.2.7) when using installations and
equipment, provided that the installations and equipment comply with relevant standards and
are designed and installed for use by ordinary persons (3.2.7).
This document has not been developed specifically to apply to the electrical installations listed
below. However, if there are no other rules or procedures, the principles of this document could
be applied to them:
– on any aircraft and hovercraft moving under its own power, (international aviation laws can
apply);
– on any sea going ship moving under its own power, or under the direction of the master,
(international marine laws can apply);
– electronic telecommunications and information systems;
– electronic instrumentation, control and automation systems;
– at coal or other mines;
– on off-shore installations (international marine laws can apply);
– on vehicles;
– on electric traction systems;
– on experimental electrical research work.