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Fabricated Copper Parts

OEM Copper Parts
OEM Copper Parts
Copper Bus Bar Fabrication
Copper Bus Bar
Bus Bars and Bus Bar Kits
Copper Ground Bars and Kits
Flexible Braided Connectors
Braided Flex Connectors
Laminated Bus Bar
Laminated Bus Bar
Epoxy and Fluidized Bed Powder Coated Bus Bar
Powder Coated Bus Bar
Battery Connectors, Straps and Posts
Battery Connectors & Straps
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Sheila Stone
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240 Industrial Park Lane
Decatur, TN 37322
FAX 423-334-3389



Copper Bus Bar Ampacity Tables

Storm has provided the following links to copper bus bar ampacity and design tables for both rectangular bus bars of Copper Alloy 11000 with similar surfaces used at typical installations, and also a table relating to design considerations of laminated bus bar ampacity.

Ampacities were calculated using a nominal conductivity of 99% IACS and should also be applicable to other coppers with the same electrical conductivity. Listed for 60 Hz at temperature rises of 30, 50, and 65 °C from a 40 °C ambient, they were determined from accurate emissivity coefficients measured by calorimetric techniques.

The methods are described in Electrical Coils and Conductors, by H.B. Dwight (McGraw-Hill Publishing Co., New York, 1945, Chapt. 19).

Storm Copper Bus Bars


Use the following links to view Storm's bus bar ampacity tables...

Table 1. Ampacities of Copper Alloy 11000 Bus Bars - Ampacities in this table are for buss 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 buss bars in service.

Table 2. Quick Ampacity Bus Bar Size Selector - Knowing the ampacity, designers and estimators can get the approximate buss bar size. Ampacity of the busbar selected must then be verified by checking Table 1.

Table 3. Effect of Emmissivity and Number of Bus Bars on Ampacity - Data here show how higher emissivities improve ampacity. Multiple buss bars also affect ampacity in a nonlinear relationship. Ampacity may be raised by increasing heat dissipation through the use of convection cooling or surface treatments.




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