Flat copper-bonded steel earthing strip, 50 x 8 mm, cross-section 400 mm², with a copper layer of not less than 100 µm bonded to a low-carbon steel core. The 100 µm copper layer suits power system earthing, earth grids, bonding and strips in concrete.
50 x 8 mm Section | 400 mm² Cross-section | 100 µm Copper layer | 3.153 kg/m Mass |
Why this strip
- Right grade for power earthing. Copper layer of not less than 100 µm on all faces and edges, for IS 3043 earth grids, equipment earthing and bonding.
- Steel strength, copper surface. The steel core keeps the strip straight in trenches and on trays; the bonded copper does not separate on bending.
- Section shown. 400 mm² with a 1 s current of about 32.8 kA on the steel core basis.
- Easy to handle. 3.153 kg/m, about 15.8 kg per 5 m length.
- Theft deterrent. Low scrap value compared with solid copper strip.
For buried LPS earth termination use 250 µm
Where IEC 62561-2 or IS/IEC 62305-3 applies to an earth conductor in soil, specify the 250 µm grade. Make buried joints by exothermic weld and seal every drilled hole and cut end.
Specifications
| Electrical Parameters |
| Material | Copper-bonded steel |
| Material Grade | Low-carbon steel core, bonded electrolytic copper 99.9 % |
| Copper Layer | Not less than 100 µm on all faces and edges |
| DC Resistance at 20 °C | about 0.29 ohm/km |
| Electrical Conductivity | about 15 % IACS |
| Short-Circuit Current (1 s, steel core basis) | About 32.8 kA, k = 82, 500 °C final |
| Mechanical Parameters |
| Conductor Type | Flat strip, solid |
| Section | 50 x 8 mm |
| Cross-Section | 400 mm² |
| Mass per Metre | 3.153 kg/m |
| Bend | 90 degrees flatwise over 5 x thickness, no cracks or peeling |
| Tensile Strength | Steel core value on the mill test certificate of each lot |
| Standards and Certification |
| Code of Practice | IS 3043:2018 |
| Applicable Standard | IEC 60364-5-54 |
| Type Tests | IEC 62561-2 (IS 18925-2): coating, bend, resistance, corrosion conditioning |
| LPS Earth Termination | Buried LPS earth termination needs the 250 µm grade |
| Building Code | National Building Code of India, NBCS 2026, Part 8 Section 2 |
| Safety Regulation | CEA (Measures relating to Safety and Electric Supply) Regulations 2023 |
| Quality System | ISO 9001:2015 certified; CE marked; RoHS compliant |
| Finish and Supply |
| Surface | Bright copper; lot tag |
| Supply Form | Straight lengths of 5 m |
| Unit of Sale | Metre (m) |
| Minimum Web Order | 1000 m |
| Application and Installation |
| Used For | Power system and equipment earthing to IS 3043 and IEC 60364-5-54: earth grids and mats, transformer, panel and DG earth connections, bonding rings, strips in foundations and above ground runs; for buried LPS earth termination use 250 µm |
| Joints | Exothermic weld in soil; bolted above ground with copper-bonded or stainless steel hardware, holes sealed |
| Do Not Use In | Buried LPS earth termination where IEC 62561-2 or IS/IEC 62305-3 calls for 250 µm copper; drilling, punching or cutting without sealing the bare steel; direct contact in soil with GI, bare steel or aluminium; acidic, ammoniacal or sulphurous soils |
| Product Identification |
| Product Code | LPES-ECN-FL-CB100-50x8 |
| Product Number | 32-01-03-03-050080-0000-03 |
