Covered Cable (ABNT NBR 11873)

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Covered Cable (ABNT NBR 11873)

Covered cable designed to ABNT NBR 11873 standards.

Safe and durable solution for overhead LV distribution.

Weather-resistant covered conductor for Brazilian networks.

Ideal for urban and rural power lines – ABNT certified.

Reliable covered cable with tough insulation and easy installation.

Application

Covered Cable manufactured according to ABNT NBR 11873 is a low-voltage overhead distribution solution widely used in Brazil and Latin American markets. Designed to improve safety over bare conductors, it features a non-insulated aluminum conductor covered with a UV-resistant thermoplastic or thermoset layer, providing protection against accidental contact and reducing the risk of electrical faults.

Unlike fully insulated Aerial Bundled Cable (ABC), covered cable retains electrical conductivity to ground, allowing fault detection and protection systems to function normally, while still offering a basic safety barrier against vegetation, animals, and unintentional human contact.

The cable is lightweight, flexible, and easy to install on poles using conventional accessories. It is suitable for urban, rural, and forested environments, especially where cost, simplicity, and increased safety are important. It also supports network expansion and modernization with minimal infrastructure investment.

Compliant with ABNT NBR 11873, this cable ensures mechanical strength, weather resistance, and long service life under tropical conditions. It is an ideal solution for utilities seeking a practical balance between bare conductor systems and fully insulated ABC in overhead low-voltage networks.

Specifications

CategoryTechnical DescriptionTypical Applications
Applicable StandardABNT NBR 11873 – Brazilian standard for covered (not fully insulated) low-voltage overhead cablesWidely used in Brazilian utility networks for 0.6/1 kV LV overhead distribution
Cable TypeCovered Cable (also called protected conductor) – single aluminum conductor with a thin insulation layerUsed where partial insulation is sufficient to reduce faults due to trees or contact
Conductor MaterialHard-drawn aluminum 1350-H19, solid or stranded, Class 2Lightweight and corrosion-resistant
Insulation / CoveringThermoplastic material (commonly PE, HDPE, or PVC) with reduced thickness (not rated as full insulation)Provides mechanical protection and limited electrical shielding
Structure– Single-core conductor- Uniform thin covering (not meeting full dielectric insulation level)Typically installed in parallel spans, not twisted or bundled
Voltage Rating0.6/1 kV nominalDesigned for low-voltage public distribution
Installation TypeMounted on poles using insulators (as with bare conductors); no full insulation clearance reductionUseful in areas with vegetation proximity or reduced outage tolerance
Environmental ResistanceResistant to UV, moisture, and abrasionSuitable for tropical climates, including high humidity regions
Standards Compliance– ABNT NBR 11873- Reference to ABNT NBR NM 280 (conductor specs)- Can align with utility specsAccepted by Brazilian utilities (e.g., Eletrobras, CPFL) for overhead systems



Parameter

Section (mm)Conductor Diameter (mm)Coverage – Thickness (mm)Coverage – Diameter (mm)Nominal Weight (kg/km)
356,95313,3184
508,15314,6226
709,65316,1297
9511,45318384
12012,95319,5462
15014,4321546
18516,15322,8672
24018,29325843
30020,65327,41021

 

Section (mm)Conductor Diameter (mm)Coverage – Thickness (mm)Coverage – Diameter (mm)Nominal Weight (kg/km)
356,95415,4225
508,15416,6271
709,65418,2346
9511,45420437
12012,95421,6520
15014,4423,1608
18516,15424,9739
24018,29427,1916
30020,65429,51101

 

Section (mm)Conductor Diameter (mm)Coverage – Thickness (mm)Coverage – Diameter (mm)Nominal Weight (kg/km)
709,657,626,8879
9511,457,628,7953
12012,957,630,21028
15014,47,631,71129
18516,157,633,51230
24018,297,635,71333
30020,657,638,21437

 

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