Copper Busbar Ampacity Chart

Area weight per ft in lb.

Copper busbar ampacity chart.

Ampacities and mechanical properties of rectangular copper busbars. Understanding bus bar ampacity charts. 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. 110 busbars ampacities in the table below are for bus bars having an emissivity of 0 4.

There are a number of considerations that need to be recognized beyond the figures given in the chart. Dc resistance at 20 c microhms ft. Ampacities of copper no. For currents below 300 amps please refer to the design guide formula.

Ampacities in the table below are for bus bars having an emissivity of 0 4. Ampacity charts for sizing copper bus bar with allowable temperature rise. Ampacities of copper alloy c11000 bus bars. Table gives bus bar cross section which will probably be large enough for ampacities within each range.

Ampacities of copper busbars alloy 11000 explore storm copper s products and services fabricated copper parts dimension in. In mcm thousand circ mils skin effect ratio at 90 c 60 hz ampacity amp skin effect ratio at 90 c 60 hz ampacity amp skin effect. 30 c rise 50 c rise 65 c rise skin effect ratio at 90 c 60 hz ampacity amp. Quick busbar selector knowing the ampacity designers and estimators can get the approximate bus bar size.

Braided copper ampacity and specifications. Ampacity of the bus bar selected must then be verified by checking table 1. Dc resistance at 20 c microhms ft. This article presents a brief overview of ampacity charts for both copper and aluminum bus bar and shows how to interpret the data within.

Table courtesy of copper development association inc. Bus bar ampacity table ampacities of copper bus bars alloy uns c11000 dimension in. This table is generally used for currents above 300 amps. Assume that required ampacity is 185 amps at 30 c rise.

However these charts can only tell you so much. 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. Ampacities of copper no. Effects of emissivity on copper bus bar.

Electrical bus bar ampacity chart table 1. Knowing required ampacity determine possible bus bar dimensions from this table. Ampacities of bus bar systems of other configurations must be calculated taking into account size spacing number of bus bars and overall skin effect ratio. 30 c rise 50 c rise 65 c rise sq.

Then check the ampacity table to verify that size selected has the necessary ampacity.