SIST EN 50186-2:2001

Overview

EN 50186-2:1998 - Live-line washing systems for power installations with nominal voltages above 1 kV (Part 2: National annexes) is a CENELEC/CLC normative document that compiles the particular national requirements applicable to live-line washing operations. The Part 2 annexes list the protective distances and other country-specific legal, regulatory and standards-based constraints in force in each CENELEC member country at the time the standard was prepared. The Slovenian adoption is published as SIST EN 50186-2:2001.

Key topics

• Scope: Applies to live-line washing systems for power installations with nominal voltages above 1 kV.
• National annexes: Country-specific requirements and deviations from the core EN 50186 provisions, presented as normative annexes.
• Protective distances: Lists the required separation distances and related controls that protect personnel, equipment and the public during live-line washing.
• Legal/regulatory alignment: References the relevant national laws, regulations and standards that determine protective measures.
• Compliance note: Annexes reflect the state of national rules at the time of preparation - users must verify current local regulations before implementation.

Applications

This standard is used by professionals involved in the planning, design, procurement and operation of live-line washing systems:

• Utility and transmission/distribution engineers specifying cleaning procedures for overhead lines and substations.
• Safety managers and compliance officers verifying that live-line washing meets national protective distance rules.
• Equipment manufacturers and system integrators ensuring designs can be adapted to country-specific requirements.
• Regulators and consultants producing risk assessments, method statements and national safety guidance for live working and washing operations.

Practical uses include selecting appropriate cleaning equipment, defining safe working envelopes near energized conductors, preparing work permits, and incorporating national protective distances into training and operational procedures.

Related standards

• Part 2 is intended to be used alongside the core technical requirements of the EN 50186 series (the Part 1/general requirements and any other parts) and with applicable national electrical safety standards. Because Part 2 records national variations, always consult the current national annex and local regulations to ensure up‑to‑date compliance.

Keywords: EN 50186-2:1998, live-line washing systems, protective distances, national annexes, CENELEC, power installations above 1 kV, SIST EN 50186-2:2001.