Complete Interpretation of ABNT NBR 16612 (2020) Brazil Mandatory PV Cable Standard
I. Basigninoitic Standard Definition & Positioning
Full Official Name
Power cablstnemeriuqees for photovoltaic systems, halogen‑free, insulated, with sheath, for up to 1.8 kV DC — Performance requirements
Coseture Attributes
Valid Version: 2020 2nd Edition, mandatory national standard for single-core DC photovoltaic cables in Brazil; enforced by INMETRO for customs clearance and local project bidding.
Standard Nature: Independent Brazilian local mandatory specification, not equivalent to EU EN 50618 or IEC 62930.
Regulatory Body: ABNT (Associação Brasileira de Normas Técnicas), supervised by INMETRO for market access certification.
Official Application Scope
Single-core flexible halogen-free double-extrusion PV cables for PV DC circuits:
Nominal DC rated voltage: 1500 V DC
Maximum allowable operating DC voltage: 1800 V DC
Equivalent AC rating: 0.6/1 kV AC
Service environment: Long-term outdoor UV exposure, humid coastal salt fog zones, high-temperature inland solar farms, underground direct burial, floating PV reservoirs across Brazil.
II. Mandatory Cable Structural Requirements (Zero Tolerance for Non-Compliance)
Conductor (Strict Hard Rule)
Class 5 flexible multi-strand tinned electrolytic copper; bare copper, aluminum alloy conductors are strictly prohibited.
Reason: Brazil’s long coastline creates heavy salt fog corrosion; tin coating blocks copper oxidation and avoids overheating at terminal connections.
Insulation + Outer Sheath Material
Double-layer thermoset cross-linked halogen-free polyolefin (XLPO) co-extruded structure; LSZH low-smoke zero-halogen flame retardant formula, built-in UV & ozone stabilizers. Thermoplastic PVC compounds fail compliance testing.
Temperature Rating
Continuous long-term conductor operating temperature: 90℃; temporary overload short-term peak temperature allowed up to 120℃.
Standard Cable Color Coding
Red (positive string), Black (negative string), Green-Yellow bi-color (grounding/earthing wire); custom colors only permitted for bulk OEM orders after INMETRO filing.
Mechanical Structural Limits
Fixed minimum thickness tolerance for insulation & sheath; sheath stripping test requirement: stripping cannot scratch or damage the tinned copper layer underneath insulation.
III. Mandatory Full Test List Required for INMETRO Registration
All items must pass accredited Brazilian laboratory testing before certification issuance:
1. Electrical Performance Tests
Conductor DC resistance at 20℃ (strict Class 5 tinned copper tolerance control; under-sized copper fails directly)
1.8 kV DC withstand voltage aging test
Long-term insulation resistance testing under high temperature & humidity
2. Thermal Aging & Lifetime Tests
Air thermal accelerated aging cycle test
Extended thermal service life durability assessment (higher cycle count than EN 50618)
3. Environmental Weathering Tests
UV accelerated weathering chamber aging
-40℃ low-temperature winding & impact bending test
Hot-cold cyclic alternating temperature test
Oil resistance & chemical solvent immersion resistance
Anti-mold microbial growth test for tropical humid regions
4. Fire Safety Combustion Tests
Halogen content limit inspection (zero halogen)
Low smoke density measurement during combustion
Vertical single cable flame retardant test (IEC 60332-1 self-extinguishing, no flame propagation)
5. Mechanical Property Tests
Tensile strength & elongation retention (original + post-aging)
Tear resistance for insulation and sheath
Sheath stripping compatibility test (no tin layer damage)
IV. Core Differences: ABNT NBR 16612 vs EU EN 50618 (H1Z2Z2-K)
表格
Test & Specification Item | ABNT NBR 16612 (Brazil National Standard) | EN 50618 (EU H1Z2Z2-K) |
|---|---|---|
Conductor Rule | Mandatory Class 5 tinned copper; bare copper/aluminum forbidden | Class 5 tinned copper recommended, partial variants allowed |
Continuous Conductor Temp | Fixed 90℃ long-term operating limit | 120℃ continuous rated temperature |
Maximum DC Operating Voltage | Up to 1800 V DC | Max nominal 1500 V DC |
Market Access Certification | INMETRO registration compulsory for customs clearance | TÜV/Notified Body EU certification |
Weathering Test Cycles | Longer UV & salt fog aging cycles for Brazil coastal climate | Standard EU UV aging cycles |
Critical Compliance Note | EN50618 certificate alone cannot satisfy NBR 16612; separate full retesting required | EU projects only accept EN 50618 certification |
Key Reminder: Solar cables with only TÜV 2 PfG 1169 (PV1-F) or EN 50618 reports are rejected during Brazilian customs inspection and project tender evaluation.
V. Mandatory Permanent Cable Marking Print Requirement
Markings printed every maximum 500mm along cable outer sheath, abrasion-resistant, unerasable after 10 wet cloth wipes. Minimum mandatory text block:
ABNT NBR 16612 | 1,8 kV DC | tinned Cu class 5 | 90℃
Additional required print: Cable cross-section size, manufacturer brand, factory origin code, INMETRO registration number.
VI. Critical Export Risks for Brazil PV Cable Suppliers
Ordinary standard PV1-F / H1Z2Z2-K cables fail NBR 16612 structural & temperature tests, cannot clear Brazilian customs.
Removing tin coating on copper conductor violates the core standard clause; coastal distributed & floating PV projects will suffer joint oxidation, power loss and ground fault failures within 3–5 years.
INMETRO registration is a non-negotiable customs clearance document; EU TÜV certification holds no legal validity in Brazil’s import supervision system.
Product labels, datasheets and test reports must include Portuguese translation, complete with local Brazilian importer representative information for INMETRO audit.
Batch random inspection by Brazilian customs authorities will reject shipments failing sheath marking, conductor material or voltage rating checks.
VII. FAQ for B2B Buyers & Solar EPC Contractors
Q1: Can EN 50618 certified solar cables be directly exported to Brazil?
A: No. EN50618 only meets European technical parameters; temperature rating, maximum DC voltage and conductor mandatory rules differ from NBR 16612. Full re-testing per Brazilian standard plus INMETRO registration is mandatory.
Q2: Why does NBR 16612 enforce tinned copper conductors?
A: Brazil has thousands of kilometers of coastal PV installations with persistent salt fog. Bare copper oxidizes rapidly at cable terminals, rising contact resistance causing overheating, power generation loss and fire risks.
Q3: Is INMETRO certification required for small sample shipments to Brazil?
A: Yes. Even small trial orders must carry valid INMETRO registration; customs will seize uncertified photovoltaic cables.
Q4: Can AD8 floating PV cables (2 PfG 2750) meet ABNT NBR 16612?
A: Only if the AD8 cable passes full NBR 16612 laboratory testing and completes INMETRO filing. EU floating PV standard specifications do not automatically comply with Brazil’s 90℃ temperature and 1800V DC rules.
Hualan Technology was founded in 2020, is a collection of solar accessories production, sales, research and development and service as one of the high-tech enterprises. At present, the business covers the production and sales of solar photovoltaic cables, photovoltaic cable connectors.
