FAQEU

LVD FAQ Spare Parts

A spare part can be inside or outside the Low Voltage Directive depending on what is supplied, the voltage range, whether its safety can be assessed on its own, and whether it is only incorporated into finished equipment.

This page helps separate parts that need their own LVD evidence from parts whose safety is assessed through the finished product.

Author
Sorena AI
Published
May 9, 2026
Updated
Jul 31, 2026
Questions
4

Structured answer sets in this page tree.

Primary sources
4

Cited legal and guidance references.

Publication metadata
Sorena AI
Published May 9, 2026
Updated Jul 31, 2026
Overview

Under the Low Voltage Directive, a is not treated the same way in every case. If the supplied part is electrical equipment in the LVD voltage range and its safety can be assessed on its own, it may need its own conformity assessment, technical documentation, EU declaration of conformity, and CE marking. If the part is a basic component whose safety depends mainly on how it is built into another product, the finished-equipment manufacturer still needs evidence that the part is suitable for safe assembly, connection, maintenance, and use.

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Question 1

When does an LVD spare part need its own CE marking?

Treat the as an LVD product in its own right when it is electrical equipment supplied for the EU market, falls within the 50-1000 V AC or 75-1500 V DC range, is not excluded from the Directive, and can be assessed for safety as supplied. Member States have applied the recast Directive's substantive provisions since 20 April 2016. The LVD Guide gives transformers and electrical motors as examples of components intended for incorporation that can be covered as such by the LVD.

Do not put a CE mark on a basic component merely because it will later sit inside electrical equipment. The LVD Guide distinguishes basic components, whose safety can only largely be assessed after incorporation, from other electrical components for which a risk assessment can be made before incorporation.

  • Covered as a standalone LVD item: keep the product identification, voltage rating, intended use, safety assessment, applied standards or other technical solution, test evidence, EU declaration of conformity, CE marking evidence, and traceability details.
  • Not covered as a standalone LVD item: keep the supplier data, ratings, drawings, material limits, installation constraints, and the finished-product assessment showing safe assembly and connection.
  • Borderline cases: document why the part can or cannot be assessed on its own, because the CE marking boundary follows the product placed on the EU market, not the label used by the service team.

How should spare parts be handled under the Low Voltage Directive?

Start with the product being supplied. A that is electrical equipment in the LVD voltage range and can be safety-assessed as supplied may need its own LVD conformity assessment, EU declaration of conformity, and CE marking before it is placed on the EU market. A basic component whose safety depends mainly on incorporation should instead be controlled through supplier evidence and the finished equipment's technical documentation.

Does a CE-marked make the finished equipment compliant?

No. The Blue Guide states that a finished-product manufacturer may rely on conformity assessment of an integrated product, but CE-marked parts do not automatically make the finished product compliant. The manufacturer of the finished equipment remains responsible for selecting suitable parts, assessing the assembled product, drawing up the EU declaration where required, and affixing the CE marking to the finished electrical equipment.

Citations
Question 2

How incorporation changes the evidence

For a part built into finished electrical equipment, the finished-product file should show both the part's suitability and the safety of the assembled result. Annex I of the LVD requires electrical equipment and its component parts to be made so they can be safely and properly assembled and connected, and it also requires protection against hazards when the equipment is used as intended and adequately maintained.

This is why a repair bill of materials is not enough. The record should show that the replacement part has the same or acceptable ratings, insulation, thermal limits, mechanical fit, environmental limits, installation instructions, and safety warnings for the equipment in which it is used.

  • Match the to the finished equipment's model, variant, voltage, current, temperature, enclosure, intended use, and maintenance instructions.
  • Keep supplier declarations or test reports only where they identify the actual part or part family and the requirements they support.
  • Update the finished-equipment safety assessment when a substitute part changes ratings, protection, materials, firmware, thermal behavior, insulation, clearances, creepage distances, or user instructions.
Citations
Question 3

Who carries the manufacturer or importer duties?

The original equipment manufacturer remains responsible for the LVD compliance of equipment it places on the market under its name. A company that imports an LVD-covered from outside the EU must check that the manufacturer completed the conformity assessment, prepared technical documentation, applied CE marking, and supplied required documents before the part is placed on the EU market.

An importer or distributor can become the manufacturer for LVD purposes if it places electrical equipment on the market under its own name or trade mark, or modifies electrical equipment in a way that may affect compliance. The same risk applies when a service organization markets a replacement assembly as its own compliant product rather than acting only as a repair channel.

  • Manufacturer: establish technical documentation, assess risks, demonstrate conformity, draw up the EU declaration, affix the CE marking, and keep the documentation and declaration for 10 years after placing the equipment on the market.
  • Importer: verify the manufacturer's conformity assessment, technical documentation, CE marking, required documents, and identification details; keep a copy of the EU declaration for 10 years and ensure technical documentation can be made available.
  • Distributor or service channel: verify visible CE marking and required documents for covered electrical equipment, act with due care, and do not make equipment available when there is reason to believe it is non-conforming or presents a risk.
Citations
Recommended next step

Check the CE boundary before replacing or selling the part

Use the spare-part record to show whether the item is LVD-covered electrical equipment in its own right, a component assessed through finished equipment, or a repair substitution that changes the original safety case.

Question 4

Repairs, substitutions, and documentation retention

A repair using an identical or similar does not require a new conformity assessment of the already placed product when the work maintains or restores its original condition. A better-performing replacement made available through technical progress does not by itself make the repaired product new when performance remains within the intended use, range, and maintenance considered at the design stage.

The Blue Guide uses a case-by-case test for an important change or overhaul. A modified product must be treated as new when its original performance, purpose, or type changes beyond the initial risk assessment, the nature of a hazard changes or the risk level increases, and the product is then made available or put into service where the applicable law covers that event. The person carrying out that takes the manufacturer obligations for the modified product.

A used item already placed on the EU market is not placed on the market again merely because it is resold. By contrast, used or second-hand electrical equipment imported from outside the EU and supplied in the EU for the first time is treated as a first EU placement and must meet the Union rules applicable at that time. Record the unit identity, origin, first-EU-supply evidence, configuration, condition, and responsible economic operator instead of relying on an age or resale label.

Refurbishment also needs a role decision. A business that releases refurbished equipment under its own name or trademark, or changes it in a way that may affect LVD compliance, assumes manufacturer duties. If the work only restores the original compliant condition, keep the repair basis and post-repair checks; if the work creates a new product or a , complete the applicable conformity assessment, technical documentation, declaration, marking, instructions, and traceability before release.

For LVD spare parts, keep records long enough to answer both market-surveillance and product-safety questions. The Directive requires manufacturers to keep technical documentation and the EU declaration for 10 years after electrical equipment has been placed on the market, and it requires traceability information to be presentable for 10 years after supply.

  • For routine repair: retain the replaced part identity, replacement part identity, compatibility basis, installer instructions, warnings, and any post-repair safety checks.
  • For a changed part: record whether the substitution affects the safety assessment, applied standards, risk analysis, instructions, markings, or EU declaration.
  • For imports and private-label parts: retain declarations, technical-file access assurances, manufacturer and importer contact details, supply-chain traceability, complaint records where relevant, and any corrective-action history.

Does resale of used electrical equipment create a new LVD placement?

Not when the same unit was already lawfully placed on the EU market and is only resold within the EU. Keep evidence of that original placement and assess any repair or modification separately. A used unit imported from outside the EU and supplied in the EU for the first time is a first EU placement and must satisfy the rules applicable at that time.

When does a refurbisher take manufacturer duties?

A refurbisher takes manufacturer duties when it supplies the equipment under its own name or trademark, or modifies it in a way that may affect compliance. Routine restoration does not automatically create a new product, but the decision needs unit-specific evidence covering the original configuration, work performed, changed hazards, verification, markings, instructions, and release identity.

What should a substantial-modification record contain?

Identify the unit, original intended use and performance, each physical or digital change, the hazards and risk levels before and after the work, the protective measures required, the responsible person, and whether the changed unit is made available or put into service. Link the decision to the updated conformity evidence and release documents.

Citations
Primary sources

References and citations

single-market-economy.ec.europa.eu
Referenced sections
  • Commission page used for the limited standards point: harmonised standards can support presumption of conformity only for requirements they cover.
"presumption of conformity"
ec.europa.eu
Referenced sections
  • Connects LVD spare-part evidence to the Directive's article-by-article guidance on scope, safety objectives, and Annex III technical documentation.
"technical documentation, declaration of conformity and CE marking"
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