Copper Bus Bar Ampacity Chart

Dc copper busbar ampacities.

Copper bus bar ampacity chart.

Area weight per ft in lb. 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 alloy c11000 bus bars. There are a number of considerations that need to be recognized beyond the figures given in the chart.

The number of sizes shown are not as extensive as those in the tables of ac ampacities and there may be slight discrepancies between. However these charts can only tell you so much. 30 c rise 50 c rise 65 c rise sq. Ampacities in the table below are for bus bars having an emissivity of 0 4.

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. This table is generally used for currents above 300 amps. Ampacity of the bus bar selected must then be verified by checking table 1. Knowing required ampacity determine possible bus bar dimensions from this table.

Ampacities and mechanical properties of rectangular copper busbars. Table courtesy of copper development association inc. 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.

Please consult a qualified electrician or professional engineer to determine the appropriate values for your specific application. Then check the ampacity table to verify that size selected has the necessary ampacity. Ampacities are based on the 2017 nec and do not reflect any temperature correction or ampacity adjustments that may be required. The following tables have been provided by the alliance for telecommunications industry solutions atis t1 committee and represent ampacities for busbar sizes and arrangements typically found in the telecommunications industry.

Ampacities and mechanical properties of rectangular copper busbars. Assume that required ampacity is 185 amps at 30 c rise. Bus bar ampacity table ampacities of copper bus bars alloy uns c11000 dimension in. Dc resistance at 20 c microhms ft.

Table gives bus bar cross section which will probably be large enough for ampacities within each range. 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. Understanding bus bar ampacity charts. For currents below 300 amps please refer to the design guide formula.

Ampacities of copper no.