Ⅰ Common Grades and Applicable Scenarios of Electrical Conductive Aluminum Busbars
1. 1060 (Recommended First Choice)
Aluminum content: 99.6%, conductivity: 37-38 MS/m, moderate mechanical strength. Suitable for routine workshop power transmission, distribution cabinet busbars, and equipment power lines. It offers the highest cost performance and covers 80% of industrial scenarios.
2. 1070
Aluminum content: ≧99.7%, conductivity: 38-39 MS/m, slightly better conductivity than 1060. Suitable for high-precision conductive scenarios (e.g., power supply for precision instruments and electronic equipment), to be selected when budget is sufficient.
3. 1100
Aluminum content: 99.0%, conductivity: 35-36 MS/m, slightly higher mechanical strength. Suitable for scenarios with general conductivity requirements but frequent handling/installation (e.g., temporary power supply busbars).
4. 6063 (Special Aluminum Alloy)
Aluminum content: approx. 98.5%, conductivity: 29-30 MS/m, high mechanical strength and corrosion resistance. Suitable for conductive scenarios in outdoor or humid environments (e.g., external wiring busbars of workshops). Its conductivity is slightly inferior but durability is stronger.
Ⅱ Thickness Selection of Electrical Conductive Aluminum Busbars (Core Factor: Current-Carrying Capacity)
The combination of thickness and width determines the cross-sectional area, which in turn affects the current-carrying capacity. Conventional thicknesses and their corresponding scenarios:
1. 2mm-3mm
Suitable for small current scenarios (50-150A), such as control lines for small equipment and branch busbars of distribution cabinets. Common widths: 10mm-30mm.
2. 5mm-8mm
Suitable for medium current scenarios (150-300A), such as power supply for workshop machine tools, fans and other power equipment. Common widths: 30mm-80mm.
3. 10mm-15mm
Suitable for large current scenarios (300-500A), such as workshop main power busbars and main power supply for high-power equipment. Common widths: 80mm-150mm.
4. 15mm-20mm
Suitable for extra-large current scenarios (above 500A), such as transformer output busbars in workshops. Common widths: 150mm-200mm.
5. Corresponding Table of Different Grades - Thicknesses - Current-Carrying Capacities of Aluminum Busbars
Corresponding Table of Different Grades - Thicknesses - Current-Carrying Capacities of Aluminum Busbars (Bare laying in air, ambient temperature: 25℃)
Aluminum Busbar Grade
Thickness (mm)
Common Width (mm)
Cross-Sectional Area (mm²)
Current-Carrying Capacity Range (A)
Applicable Scenarios
1060 (First Choice)
2
10, 15, 20
20, 30, 40
50-90
Control lines for small equipment, branch busbars
1060 (First Choice)
3
20, 30, 40
60, 90, 120
90-160
Power lines for small and medium-sized equipment
1060 (First Choice)
5
30, 50, 80
150, 250, 400
160-320
Main equipment such as workshop machine tools and fans
1060 (First Choice)
8
50, 80, 100
400, 640, 800
320-450
Main power supply for high-power equipment
1060 (First Choice)
10
80, 120, 150
800, 1200, 1500
450-550
Workshop main power busbars
1060 (First Choice)
15
100, 150, 200
1500, 2250, 3000
550-700
Extra-high-power equipment, transformer output
1070 (High Precision)
2
10,15,20
20, 30,40
55-95
Control lines for precision instruments
1070 (High Precision)
3
20, 30, 40
60, 90, 120
95-170
Power lines for precision equipment
1070 (High Precision)
5
30, 50, 80
150, 250, 400
170-330
Power supply for high-precision and high-power equipment
1100 (General Purpose)
2
10, 15, 20
20, 30, 40
45-85
Temporary power supply busbars, low-requirement scenarios
1100 (General Purpose)
3
20, 30, 40
60, 90, 120
85-150
Temporary lines with frequent installation and handling
1100 (General Purpose)
5
30, 50, 80
150, 250, 400
150-300
Low-precision equipment in conventional environments
6063 (Outdoor/Humid)
3
20, 30, 40
60, 90, 120
80-140
External wiring busbars of workshops
6063 (Outdoor/Humid)
5
30, 50, 80
150, 250, 400
140-280
Power supply for equipment in humid environments
6063 (Outdoor/Humid)
8
50, 80, 100
400, 640, 800
280-400
Power supply for outdoor high-power equipment
Note: The current-carrying capacity is a reference value. It needs to be reduced by 20%-30% for enclosed laying (inside pipe cabinets), and by 10%-15% when the ambient temperature exceeds 35℃.
Ⅲ Key Principles for Selection
Prioritize thickness based on current-carrying capacity: the larger the current, the thicker/wider the aluminum busbar required to ensure heat dissipation and conductive safety. The mainstream grades of conductive aluminum busbars are 1060, 1070, 1100 (industrial pure aluminum) and 6063 (aluminum alloy); 1060 is preferred for conventional workshops, balancing performance, strength and cost; 1070 is selected for high-precision equipment, and 6063 for outdoor/humid environments.
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