Copper
Bare copper conductor for busbars and overhead contact lines
M is a bare copper conductor. Solid or stranded from copper wires. Used for busbar and contact connections in switchgear, earthing systems and overhead contact lines of electric transport. Designation breakdown: M – copper.
Sizes with actual technical specifications.
| Cross-section, mm² | Number of wires | Diameter, mm | Weight, kg/km | DC resistance, Ω/km |
|---|---|---|---|---|
| M-10 | 1 | 3.55 | 89 | 1.84 |
| M-16 | 7 | 5.1 | 142 | 1.15 |
| M-25 | 7 | 6.4 | 222 | 0.727 |
| M-35 | 7 | 7.5 | 311 | 0.524 |
| M-50 | 19 | 9.0 | 444 | 0.387 |
| M-70 | 19 | 10.7 | 622 | 0.268 |
| M-95 | 19 | 12.5 | 845 | 0.193 |
| M-120 | 19 | 14.0 | 1067 | 0.153 |
| M-150 | 19 | 15.8 | 1334 | 0.124 |
| M-185 | 37 | 17.5 | 1652 | 0.099 |
| M-240 | 37 | 20.0 | 2143 | 0.075 |
| M-300 | 37 | 22.4 | 2683 | 0.060 |
| M-400 | 37 | 25.8 | 3580 | 0.047 |
M is a bare copper conductor for applications with increased requirements for electrical conductivity and corrosion resistance. It is manufactured from M1 or M00 grade electrical copper. TCG's production uses its own KMO wire rod, made from M00k copper cathodes using UPCAST technology.
It is used for busbar connections, overhead contact lines of electric transport (trams, trolleybuses), earthing systems and jumpers in switchgear. On overhead lines it is used where high electrical conductivity (minimum losses) is required and the mechanical load is low. Copper has approximately 1.7 times lower resistivity than aluminium, which is critical for short high-current connections.
Copper wires
Made of M1 or M00 grade electrical copper per GOST. Solid for cross-sections up to 10 mm², stranded with 7-37 wires for larger cross-sections.
Stranding
Concentric layers laid in opposite directions.
Cross-section of the M conductor – concentrically stranded copper wires
Detailed technical specifications – see the TCG datasheet
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