Panel Nameplate & Documentation Requirements

Panel Nameplate & Documentation Requirements

Low-voltage switchgear and controlgear assemblies (ASSEMBLIES) up to 1 kV AC or 1.5 kV DC must carry definitive nameplate information and be accompanied by complete verification documentation. The assembly manufacturer bears responsibility for ensuring the nameplate content, mechanical marking, and the full set of design and routine test records meet IEC 61439 requirements and all referenced standards. Missing, incomplete, or incorrect nameplates or documentation undermines declared compliance and exposes projects to audit, acceptance, and export risks (IEC 61439-1:2020, Clauses 5.6 and 5.7) [IEC 61439-1].

Scope and Legal Responsibility

Per IEC 61439-1:2020, the assembly manufacturer must produce and retain verification records demonstrating the assembly meets the relevant type tests, design calculations, and routine verifications required by the standard. The manufacturer must apply, mark, and document the assembly in accordance with Clauses 5.6 (nameplate) and 5.7 (documentation), and Clause 10 (verification) [IEC 61439-1]. Non-compliance with these requirements can invalidate a declared conformity and jeopardise acceptance by utilities, operators, and authorities having jurisdiction.

Mandatory Nameplate Information

IEC 61439-1 and IEC 61439-2 prescribe the fields that must appear on a permanent nameplate fixed to the assembly. The manufacturer must include the following minimum information (Clause references in parentheses):

• Manufacturer identification and assembly ID (manufacturer’s name or trademark and unique assembly or tag number) (IEC 61439-1 Clause 5.6).
• Rated voltage (Un) — highest r.m.s. AC or DC voltage for which the assembly is designed (IEC 61439-1 Clause 5.6, IEC 60947 references).
• Rated current (In) — rated currents of incoming/main circuits (IEC 61439-1 Clause 5.6).
• Rated impulse withstand voltage (Uimp) — as used for dielectric verification (IEC 61439-1 Clause 10, IEC 61439-2).
• Rated short‑circuit withstand current — Icw (rated short-circuit making/current withstand) or Ith (short-time withstand current) and the corresponding duration (IEC 61439-1 Clause 5.6; IEC 61439-2 Clause 6.1).
• Degree of protection (IP code) in accordance with IEC 60529 (specified on the nameplate) (IEC 61439-1 Clause 5.6).
• Form of internal separation — Form 1 to Form 4 (e.g., Form 4b) as declared by the manufacturer (IEC 61439-1 Clause 5.6; IEC 61439-2).
• Internal arc classification or arc rating (when applicable) per IEC/TR 61641 or equivalent internal arc verification record — this is optional but recommended when the assembly has been arc-tested (IEC/TR 61641).
• Other relevant markings — CE mark where applicable, assembly tag number, and any additional statutory or contractual markings (IEC 61439-1 Clause 5.6).

Required Nameplate Field	Purpose / Notes	IEC Reference
Manufacturer & Assembly ID	Traceability and responsibility for verification records.	IEC 61439-1 Clause 5.6
Rated Voltage (Un)	Defines dielectric and clearances/creepage requirements.	IEC 61439-1 Clause 5.6
Rated Current (In)	Main current ratings for sizing and temperature-rise verification.	IEC 61439-1 Clause 5.6
Icw / Ith and duration	Short-circuit withstand capability; must exceed prospective fault current.	IEC 61439-1 Clause 5.6; IEC 61439-2
Uimp	Used for dielectric testing and coordination with surge protection.	IEC 61439-1 Clause 10
IP code	Environmental protection level of the enclosure (ingress protection).	IEC 60529
Form of Internal Separation	Describes segregation of circuits and accessibility of live parts.	IEC 61439-1 Clause 5.6

Nameplate Mechanical and Visual Requirements

IEC 61439 requires the nameplate to be permanently affixed at a conspicuous, eye-level position on the front of the assembly using non‑corrodible screws or rivets so it remains legible throughout the service life (IEC 61439-2 Clause 6.1). Practical, industry-proven details include:

• Use of engraved or embossed metal plates or long-life printed laminates resistant to cleaning agents and UV exposure (avoid cheap adhesives where possible) [ABB Guidance].
• Black text on white background for rated values and identity; red for mandatory warnings — consistent with good engineering practice and supplier documentation examples [Siemens, ABB].
• Duplicate key circuit identification labels adjacent to functional units and at termination points to assist safe operation and maintenance (IEC 61439-2 guidance for PSC labelling and IOGP S-560 recommendations).
• Fixed, tamper-evident fasteners or rivets for panels installed in harsh or public environments.

Documentation Obligations — What Must Accompany the Assembly

The manufacturer must provide a complete documentation pack that justifies declared ratings and supports safe installation, operation, and maintenance (IEC 61439-1 Clause 5.7 and Clause 8). Required documents include:

• Type-test reports or equivalent design verification results demonstrating compliance with the relevant IEC 61439 type tests (temperature-rise, dielectric properties, short-circuit withstand, mechanical, and functional tests) (IEC 61439-1 Clause 10 and Clause 8).
• Design verification calculations where applicable — e.g., short-circuit strength calculations when the assembly is derived from type-tested designs (permitted when justified by calculation and documented procedures) (IEC 61439-1 Clause 10.2).
• Routine test certificates completed at the factory for each delivered assembly: insulation resistance, power-frequency dielectric withstand, wiring and circuit identification, protective bonding resistance, and functional checks (IEC 61439-1 Clause 10.5).
• Assembly drawings, single-line diagrams, wiring diagrams, internal layout drawings, and a bill of materials listing key components (switches, breakers, busbars, protective devices) with their catalogue references and ratings (IEC 61439-1 Clause 5.7).
• Installation, operation, and maintenance instructions including torque values, terminal identification, routine maintenance intervals, and spare parts list.
• Certificates for components where relevant (e.g., circuit-breaker type test certificates) and manufacturer declarations for subassemblies when required for traceability.

Routine Tests: Minimum Set and Records

Routine tests are mandatory for each assembly and the results must be supplied in a certificate pack. Typical routine tests required by IEC 61439 include:

• Verification of the number, type and identification of external terminals against documentation (ensures correct connections).
• Insulation resistance measurement between live parts and between live parts and earth.
• Power-frequency dielectric withstand (routine dielectric test) at the declared voltage levels for the assembly.
• Protective bonding conductor resistance measurement (continuity/earth resistance verification).
• Functional checks: interlocks, mechanical operation of breakers and disconnects, auxiliary circuits, and any protection scheme verification.
• IP verification (sampled or full test depending on delivery conditions) to confirm the declared degree of protection — often performed as part of factory testing for sealed enclosures (IEC 60529 referenced by IEC 61439).

Each routine test record must be traceable to the specific assembly serial/ID and retained by the manufacturer. Many owners require digital and signed copies as part of handover documentation (IEC 61439-1 Clause 10.5).

Internal Arc Resistance and Arc Rating Marking

Where internal arc testing has been performed (by reference to IEC/TR 61641 or equivalent internal arc test protocols), the assembly’s nameplate should display the internal arc classification and the phase access boundary/time rating. Providing an arc rating significantly improves operational safety and must be supported by the associated test report. IEC/TR 61641 provides guidance on internal arc fault testing and labelling conventions; manufacturers should reference the test report number and date on the documentation pack [IEC/TR 61641].

Industry Examples and Typical Nameplate Values

Major manufacturers illustrate typical nameplate practices and provide full documentation with their LV assemblies. Examples from industry literature and technical guides include:

• Siemens line examples (NXPLUS C, 8DJH) include Un, In, Icw, Uimp, IP, Form of separation (e.g., Form 4b), and provide full type-test and routine test certificates with each shipment [Siemens].
• ABB product literature (UniGear ZS1, SACE ranges) follows IEC 61439-1 guidance and supplies verification records and certificates for declared ratings; ABB technical application papers outline naming conventions and documentation expectations [ABB].
• Schneider Electric, Eaton, and Rittal provide similar nameplate fields and emphasise retention of design verification records, with common Icw values in the range of 25–100 kA depending on application and design [Industry sources].

Manufacturer	Example Product Line	Typical Nameplate Highlights	Typical Icw Range
Siemens	NXPLUS C, 8DJH	Un, In, Icw, Uimp, IP, Form 4b, type-test reports included	25–100 kA
ABB	UniGear ZS1, SACE Tmax	Un, In, Icw/Ith, IP/IK, separation form, verification documents	25–100 kA
Schneider Electric	Blokset, Okken	Icw, arc ratings (when tested), full documentation	25–80 kA
Eaton	Power Xpert UX	IP-rated nameplates, short-circuit documentation, routine certificates	25–80 kA
Rittal	Perforex / TS 8	IP rating per IEC 60529, assembly documentation, separation forms	Varies by assembly

Best Practices for Manufacturers and Specifiers

To ensure smooth acceptance, commissioning, and lifetime compliance, follow these best practices:

• Affix the main nameplate at eye level on the front face with non‑corrodible screws or rivets and place duplicate circuit IDs adjacent to functional units and at cable terminations (IEC 61439-2 Clause 6.1; IOGP S-560 recommendations).
• Provide a complete documentation pack (type-test reports, routine test certificates, drawings, single-line diagrams, BOM, component certificates) with every assembly shipment; retain originals and provide digital copies to the purchaser (IEC 61439-1 Clause 5.7).
• Ensure the declared Icw or Ith on the nameplate exceeds the calculated prospective fault current at the point of connection — SCCR must not be