Tukes Electrical Safety Requirements for Foreign EPC Contractors in Finland

Introduction

As Finland’s renewable energy sector continues its rapid expansion into 2026, international Engineering, Procurement, and Construction (EPC) contractors are increasingly entering the market. While the opportunities are substantial, the Finnish regulatory landscape for electrical safety is uncompromising. Compliance with local regulations is not merely a box-ticking exercise; it is a fundamental prerequisite for project execution. This guide details the essential requirements set forth by the Finnish Safety and Chemicals Agency (Tukes) for foreign contractors operating in Finland.

The Role of Tukes

The Finnish Safety and Chemicals Agency (Tukes) is the national authority responsible for supervising and enforcing electrical safety regulations. Tukes oversees the qualification of electrical professionals, maintains a register of authorized electrical contractors, and conducts market surveillance. For any EPC contractor, establishing a clear and compliant relationship with Tukes is step one.

Key Legislation

The foundation of electrical safety in Finland is established by two primary legal frameworks:

• Sähköturvallisuuslaki (1135/2016): The Electrical Safety Act sets the mandatory safety requirements for electrical equipment, installations, and work. It defines the responsibilities of operators, contractors, and network companies.
• Sähköturvallisuusasetus (1434/2016): The Electrical Safety Decree provides detailed provisions on the application of the Act, including the specifics of professional qualifications, registration procedures, and inspection protocols.

Required Qualifications

A cornerstone of the Finnish system is the requirement for specific, named individuals to hold legal responsibility for electrical work and operations.

Sähkötöiden johtaja (Electrical Works Supervisor)

Every company performing electrical installation work must appoint an Electrical Works Supervisor. This individual must possess a valid certificate of electrical qualification (Sähköpätevyys).

• S1 Qualification: Permits all electrical work, including high voltage (>1000V AC). This is universally required for utility-scale solar PV, wind, and BESS projects.
• S2 Qualification: Restricted to low voltage work (up to 1000V AC / 1500V DC).

Käytön johtaja (Operations Supervisor)

For electrical installations exceeding a certain capacity or voltage threshold (typically high voltage substations), an Operations Supervisor must be appointed before the facility is energized. They hold responsibility for the safe operation and maintenance of the installation.

Recognition of Foreign Qualifications

Foreign qualifications are not automatically recognized in Finland. Professionals educated outside Finland must apply to Tukes (often through an evaluation body like SETI Oy) for recognition. This process evaluates the equivalence of the applicant’s degree and work experience. Frequently, the applicant must also pass a Finnish electrical safety exam (Sähköturvallisuustutkinto) to demonstrate knowledge of local standards and the Sähköturvallisuuslaki.

Registration Requirements for Foreign Companies

Operating legally requires proactive registration. Foreign entities cannot simply commence work.

Notification to Tukes

Before initiating any electrical installation work in Finland, a formal notification must be submitted to Tukes. This notification includes company details, proof of liability insurance, and the nomination of the qualified Sähkötöiden johtaja.

Documentation Requirements

Contractors must maintain comprehensive documentation, including the supervisor’s qualifications, a list of electrical workers and their competence, and internal quality assurance plans. All documentation presented to authorities should ideally be in Finnish, though English is increasingly accommodated during initial technical reviews.

Relevant Standards

Finnish electrical installations are governed by strict standards, primarily aligned with European norms but featuring specific national annexes.

• SFS 6000: This is the Finnish national implementation of the IEC 60364 series for low voltage electrical installations. It contains crucial national deviations regarding grounding, freezing conditions, and safety distances.
• SFS-EN 62446: Essential for solar projects, detailing the requirements for testing, documenting, and maintaining grid-connected photovoltaic systems.
• SFS 6001: Specifies the safety requirements for high voltage electrical installations (>1000V AC), critical for substation and grid connection design.

Inspection and Commissioning Requirements

The commissioning process is heavily regulated.

1. Initial Inspection (Käyttöönottotarkastus): The contractor must perform and document a comprehensive initial inspection before energizing the system.
2. Verification Inspection (Varmennustarkastus): For Class 1, 2, and 3 installations (which encompasses almost all commercial renewable energy projects), an independent verification inspection by an authorized inspector (Valtuutettu tarkastaja) or inspection body is mandatory. This must be completed within a specific timeframe (often 3-6 months) after commissioning.

Common Compliance Challenges

International contractors frequently encounter pitfalls in the Finnish market:

• Underestimating Timeline: The process of getting foreign qualifications recognized and passing the safety exam can take several months.
• Subcontractor Chains: The principal contractor holds ultimate responsibility. Ensuring all tiers of subcontractors comply with Tukes requirements is challenging.
• Language Barrier: While engineering may be done in English, official site documentation, safety plans, and authority correspondence often require precise Finnish.

How NordEPC Supports Compliance

Navigating Tukes regulations requires deep local expertise. NordEPC provides localized engineering and regulatory compliance support for international investors and EPCs. We offer services including acting as the legally required Sähkötöiden johtaja or Käytön johtaja, managing Tukes registrations, and ensuring designs comply with SFS 6000/6001.

Learn more about our EPC Support Services and Electrical Engineering.

FAQ

Can a foreign electrical qualification act as Sähkötöiden johtaja in Finland? Yes, but it requires official recognition from Tukes. The applicant must demonstrate equivalent education and experience, and may need to pass a Finnish electrical safety examination.

What is the difference between S1 and S2 electrical qualifications? S1 (Sähköpätevyys 1) covers all electrical installations up to 110 kV and beyond, which is required for large PV and BESS projects. S2 (Sähköpätevyys 2) is limited to low voltage installations up to 1000V AC / 1500V DC.

When must Tukes be notified of electrical works? A notification must be submitted to Tukes before commencing any commercial electrical installation work in Finland, detailing the appointed responsible persons and company information.