Why copper busbar weight matters for your project
Structural support – Electrical panels, switchgear, and busway systems must be designed to support the weight of the copper busbars. Underestimating weight can lead to sagging, misalignment, or structural failure.
Shipping cost – Ocean and air freight charges are calculated by weight (actual or volumetric, whichever is higher). Copper is dense – 8.94 g/cm³. A single 100×10mm busbar at 4,000mm length weighs over 35kg. A full pallet can exceed 1,000kg.
Material cost – Copper busbar is priced per kilogram. Accurate weight calculation ensures you order the right quantity and budget correctly.
Browse our C11000 copper busbar product page for complete specifications.
C11000 copper busbar weight formula
The formula for calculating C11000 copper busbar weight is simple:
Weight (kg/m) = Width (mm) × Thickness (mm) × 0.00894
Where does 0.00894 come from? It is the density of copper in kg/cm³:
- Density of C11000 copper = 8.94 g/cm³ = 8,940 kg/m³
- Converting mm² to m²: 1,000,000 mm² = 1 m²
- 8,940 ÷ 1,000,000 = 0.00894
Example calculation – 50mm × 10mm busbar:
- 50 (width) × 10 (thickness) = 500 mm²
- 500 × 0.00894 = 4.47 kg per meter
For a 4,000mm (4 meter) busbar:
- 4.47 kg/m × 4 = 17.88 kg total
Standard C11000 copper busbar weight per meter
Below is the weight per meter for standard C11000 copper busbar sizes. All weights are based on density 8.94 g/cm³ and are theoretical weights. Actual weight tolerance: ±3%.
| Width (mm) | Thickness (mm) | Cross-section (mm²) | Weight per meter (kg) |
|---|---|---|---|
| 20 | 3 | 60 | 0.54 kg |
| 20 | 5 | 100 | 0.89 kg |
| 20 | 6 | 120 | 1.07 kg |
| 25 | 3 | 75 | 0.67 kg |
| 25 | 5 | 125 | 1.12 kg |
| 25 | 6 | 150 | 1.34 kg |
| 30 | 5 | 150 | 1.34 kg |
| 30 | 6 | 180 | 1.61 kg |
| 30 | 10 | 300 | 2.68 kg |
| 40 | 5 | 200 | 1.79 kg |
| 40 | 6 | 240 | 2.15 kg |
| 40 | 10 | 400 | 3.58 kg |
| 50 | 5 | 250 | 2.23 kg |
| 50 | 6 | 300 | 2.68 kg |
| 50 | 10 | 500 | 4.47 kg |
| 60 | 6 | 360 | 3.22 kg |
| 60 | 10 | 600 | 5.36 kg |
| 60 | 15 | 900 | 8.05 kg |
| 80 | 6 | 480 | 4.29 kg |
| 80 | 10 | 800 | 7.15 kg |
| 80 | 15 | 1,200 | 10.73 kg |
| 100 | 10 | 1,000 | 8.94 kg |
| 100 | 15 | 1,500 | 13.41 kg |
| 100 | 20 | 2,000 | 17.88 kg |
| 120 | 10 | 1,200 | 10.73 kg |
| 120 | 15 | 1,800 | 16.10 kg |
| 120 | 20 | 2,400 | 21.46 kg |
C11000 copper busbar weight per 2000mm and 4000mm
Most standard busbar lengths are 2,000mm or 4,000mm. Here are the weights for common sizes at these standard lengths:
| Width×Thickness | Weight per 2,000mm (kg) | Weight per 4,000mm (kg) |
|---|---|---|
| 20×3 mm | 1.08 kg | 2.16 kg |
| 20×5 mm | 1.78 kg | 3.56 kg |
| 20×6 mm | 2.14 kg | 4.28 kg |
| 25×3 mm | 1.34 kg | 2.68 kg |
| 25×5 mm | 2.24 kg | 4.48 kg |
| 25×6 mm | 2.68 kg | 5.36 kg |
| 30×5 mm | 2.68 kg | 5.36 kg |
| 30×6 mm | 3.22 kg | 6.44 kg |
| 30×10 mm | 5.36 kg | 10.72 kg |
| 40×5 mm | 3.58 kg | 7.16 kg |
| 40×6 mm | 4.30 kg | 8.60 kg |
| 40×10 mm | 7.16 kg | 14.32 kg |
| 50×5 mm | 4.46 kg | 8.92 kg |
| 50×6 mm | 5.36 kg | 10.72 kg |
| 50×10 mm | 8.94 kg | 17.88 kg |
| 60×6 mm | 6.44 kg | 12.88 kg |
| 60×10 mm | 10.72 kg | 21.44 kg |
| 60×15 mm | 16.10 kg | 32.20 kg |
| 80×6 mm | 8.58 kg | 17.16 kg |
| 80×10 mm | 14.30 kg | 28.60 kg |
| 80×15 mm | 21.46 kg | 42.92 kg |
| 100×10 mm | 17.88 kg | 35.76 kg |
| 100×15 mm | 26.82 kg | 53.64 kg |
| 100×20 mm | 35.76 kg | 71.52 kg |
| 120×10 mm | 21.46 kg | 42.92 kg |
| 120×15 mm | 32.20 kg | 64.40 kg |
| 120×20 mm | 42.92 kg | 85.84 kg |
How to calculate weight for custom size busbars
Not all busbar sizes are in the standard tables. Here is how to calculate weight for any custom dimension.
Step-by-step method:
| Step | Action | Example (45mm × 8mm × 2,500mm) |
|---|---|---|
| 1 | Multiply width × thickness | 45 × 8 = 360 mm² |
| 2 | Multiply by density factor (0.00894) | 360 × 0.00894 = 3.22 kg/m |
| 3 | Multiply by length in meters | 3.22 × 2.5 = 8.05 kg total |
Weight (kg) = Width (mm) × Thickness (mm) × Length (m) × 0.00894
For imperial units (inches, pounds):
- Convert inches to mm: 1 inch = 25.4 mm
- Calculate weight in kg using formula above
- Convert kg to lbs: 1 kg = 2.2046 lbs
Example – 2 inch × 0.5 inch busbar, 4 feet long:
- Width: 2 × 25.4 = 50.8 mm
- Thickness: 0.5 × 25.4 = 12.7 mm
- Length: 4 × 0.3048 = 1.22 m
- Weight = 50.8 × 12.7 × 1.22 × 0.00894 = 7.03 kg (15.5 lbs)
Ampacities of Copper Alloy C11000 Bus bars
Ampacities in the table below are for bus bars having an emissivity of 0.4. This was observed on samples exposed for 60 days in an industrial environment, and it is probably identical to that of bus bars in service.
copper vs. aluminum busbar Weight comparison
Aluminum is much lighter than copper, but that does not always make it the better choice.
| Property | C11000 Copper | Aluminum (6061) |
|---|---|---|
| Density | 8.94 g/cm³ | 2.70 g/cm³ |
| Weight for same size | Baseline | 70% lighter (0.30× copper weight) |
| Size needed for same ampacity | Baseline | 1.5× larger cross-section |
| Weight for same ampacity | Baseline | ~0.45× copper weight |
Example comparison – same ampacity (approximately 900 amps):
| Material | Size | Weight per meter | Weight for 4m length |
|---|---|---|---|
| C11000 copper | 50×10mm (500 mm²) | 4.47 kg | 17.88 kg |
| Aluminum | 75×10mm (750 mm²) | 2.03 kg | 8.12 kg |
Aluminum is lighter but requires 50% larger space to carry the same current. For applications where weight is critical (mobile equipment, aerospace), aluminum may be better. For fixed installations where space and reliability matter (switchgear, panels), copper is the preferred choice.
How weight affects shipping cost and structural support
Understanding weight helps you estimate freight costs and design proper support structures.
Shipping cost impact:
| Shipping Method | Weight Breakpoints | Typical Cost Impact |
|---|---|---|
| Air freight | Charged per kg | Heavy busbar orders can be very expensive – often 5-8× sea freight |
| Ocean freight (LCL) | Charged per cubic meter OR per 1,000kg (whichever higher) | Copper density means weight usually determines cost |
| Ocean freight (FCL) | 20FT container max 22,000kg, 40FT container max 26,000kg | One 40FT container can hold approximately 2,500kg of copper busbar – well under weight limit, space is the constraint |
Example sea freight calculation – 1,000kg of copper busbar:
- LCL rate: $100 per cubic meter OR $100 per 1,000kg
- 1,000kg of busbar occupies approximately 0.4-0.6 cubic meters
- Carrier charges by weight ($100) because that is higher than volume charge ($40-60)
- Shipping cost = $100
Structural support considerations:
| Busbar Weight | Support Spacing (recommended) | Mounting Hardware |
|---|---|---|
| Light (<5kg per piece) | Every 1,000mm | Standard insulators, plastic clips |
| Medium (5-15kg per piece) | Every 600-800mm | Reinforced insulators, steel brackets |
| Heavy (>15kg per piece) | Every 300-500mm | Heavy-duty insulators, multiple mounting points |
Precision manufacturing
Weight accuracy depends on dimensional precision. Our manufacturing process ensures consistent dimensions – and therefore consistent weight – across your entire order.
How we control weight accuracy:
| Manufacturing Step | What We Control | Impact on Weight |
|---|---|---|
| Raw material sourcing | Use certified C11000 copper from major smelters | Consistent density (±0.5%) |
| Extrusion | Precision dies for standard widths/thicknesses | Dimensional consistency |
| Cold rolling | CNC-controlled thickness reduction | Thickness tolerance ±0.1mm |
| Shearing to length | CNC shearing with length measurement | Length tolerance ±0.5mm |
Example – how thickness tolerance affects weight:
- 100×10mm busbar, target weight: 8.94 kg/m
- With ±0.1mm thickness tolerance, actual thickness ranges 9.9-10.1mm
- Actual weight ranges: 8.85 – 9.03 kg/m (±0.09 kg/m variation)
- This variation is within ±1% – negligible for most applications
How we package copper busbars
| Step | Material | Purpose |
|---|---|---|
| 1 | VCI film – inner wrap | Prevents corrosion during ocean freight |
| 2 | Foam interleaving between layers | Prevents scratching |
| 3 | Steel straps (3-5 per bundle) | Secures bundles – 1,500kg breaking strength each |
| 4 | Corner protectors under straps | Prevents strap cutting into copper |
| 5 | Heat-treated plywood pallet (IPPC certified) | Supports heavy loads – 1,500kg capacity |
| 6 | Anti-skid pad between bundle and pallet | Prevents sliding during ship motion |
| 7 | Stretch wrap (multiple layers) | Seals entire pallet |
| 8 | "Heavy Lift" labeling | Alerts forklift operators |
FAQ
What is the density of C11000 copper busbar?
8.94 grams per cubic centimeter (g/cm³) or 8,940 kg per cubic meter (kg/m³). This density is a fundamental property of pure copper. C11000 is 99.9% pure copper, so its density is essentially the same as pure copper. Compare this to aluminum (2.70 g/cm³) and steel (7.85 g/cm³) – copper is significantly denser than both.
How much does a 100x10mm copper busbar weigh per meter?
8.94 kg per meter. A 100×10mm busbar has a cross-section of 1,000 mm². Using the formula: 1,000 × 0.00894 = 8.94 kg per meter. For a standard 4,000mm (4 meter) length, total weight is 35.76 kg. For a 2,000mm length, 17.88 kg.
How do I calculate the weight of a custom size copper busbar?
Use the formula: Width (mm) × Thickness (mm) × Length (m) × 0.00894 = Weight (kg). For example, a custom 45×8mm busbar that is 1.5 meters long: 45 × 8 = 360 mm², 360 × 0.00894 = 3.22 kg/m, 3.22 × 1.5 = 4.83 kg total. For imperial units, convert inches to mm (×25.4) and feet to meters (×0.3048) first.
Is copper busbar heavier than steel busbar?
Yes – copper is about 14% heavier than steel. Steel density is 7.85 g/cm³, while copper density is 8.94 g/cm³. For the exact same size, copper is 1.14× heavier than steel. However, steel busbar has much lower conductivity (steel is <20% IACS), so a steel busbar would need to be much larger to carry the same current – making it heavier overall.
How much weight can a standard electrical panel support?
Most standard electrical panels are designed to support 50-100 kg of busbar weight. This varies by panel size and mounting structure. For reference, a 4,000mm length of 100×10mm copper busbar weighs 35.8 kg – which is within most panel limits. For larger busbars (120×20mm = 85.8 kg per 4m), verify with your panel manufacturer. We recommend adding support points every 500mm for heavy busbars.
Does plating add significant weight to copper busbar?
No – the weight added by plating is negligible (typically <0.1%). Tin plating is only 3-8 microns thick. Even silver plating at 5-15 microns adds immeasurable weight. For a 100×10mm busbar with 8 microns of tin plating, the added weight is approximately 0.0005 kg per meter – not worth calculating. For all practical purposes, plated and bare busbars weigh the same.
How do I estimate shipping weight for a large busbar order?
Multiply your total busbar length (in meters) by the weight per meter for your size. Step 1: Calculate or look up weight per meter for your size. Step 2: Multiply by total meters in your order. Step 3: Add 5-10% for packaging weight (pallet, crate, straps, foam). Example: 100 pieces of 100×10mm busbar at 4,000mm each = 400 meters total × 8.94 kg/m = 3,576 kg of copper + 5% packaging = approximately 3,750 kg shipping weight.
What is the weight difference between C11000 and C10100 copper?
Essentially zero – both have the same density of 8.94 g/cm³. C10100 (oxygen-free) is 99.99% pure versus C11000 at 99.9% pure. The 0.09% difference in purity translates to a density difference of less than 0.01% – completely negligible. For weight calculation purposes, C11000 and C10100 are identical.
