Aluminum Bus Bar Ampacity Calculator

Space between bars is assumed equal bar thickness.

Aluminum bus bar ampacity calculator.

Area weight per ft in lb. Then check the ampacity table to verify that size selected has the necessary ampacity. However these charts can only tell you so much. 14 awg 12 awg 10 awg 8 awg 6 awg 4 awg 3 awg 2 awg 1 awg 1 0 awg 2 0 awg 3 0 awg 4 0 awg 250 kcmil 300 kcmil 350 kcmil 400 kcmil 500 kcmil 600 kcmil 700 kcmil 750 kcmil 800 kcmil 900 kcmil.

Vertical bar ampacity based on work by house and tuttle. A bus bar also spelled busbar buss bar or busbar is a strip or bar of copper brass or aluminum that conducts electricity within a switchboard distribution board substation battery bank or other electrical apparatus. Assume that required ampacity is 185 amps at 30 c rise. Aluminium busbar current carrying capacity 0 8 busbar width thickness in amps.

Bus bar ampacity table ampacities of copper bus bars alloy uns c11000 dimension in. For copper bus bar and half of that for aluminum. 30 c rise 50 c rise 65 c rise sq. Dc resistance at 20 c microhms ft.

So you would be looking for 0 125 square inches 1 4 x 1 2 inch or 1 8 x 1inch. Horizontal bar ampacity from industry sources. There are a number of considerations that need to be recognized beyond the figures given in the chart. The aluminium bus bar is cheaper than copper busbar but the resistivity of the aluminium busbar is high as compared with copper busbar.

Knowing required ampacity determine possible bus bar dimensions from this table. Its main purpose is to conduct electricity not to function as a structural member. In the plating and anodizing area where bus bars tend to be say 5 to 50 foot long and the current is low voltage dc we figure 1000 amps sq. These include b 241 00 aluminum alloy seamless pipe and tube for alloys 6063 and 6061.

Wire ampacity calculator enter the information below to calculate the maximum allowable ampacity for current carrying conductors. The following calculator computes the expected time for a cable conductor or bus bar to rise in temperature under short circuit or short time overcurrent conditions. This article presents a brief overview of ampacity charts for both copper and aluminum bus bar and shows how to interpret the data within. And b 317 00 aluminum alloy extruded bar rod pipe and structural shapes for electrical purposes for alloy 6101.

Current rating of rectangular aluminum bus bar arrangements amperes for 6101 t61 alloy 57 iacs conductivity sizes inches 1 bar 2 bars 3 bars 4 bars. Wire size awg or kcmil. Understanding bus bar ampacity charts. The calculator uses empirical formulas that consider all heat generated by i 2 r losses in the conductor during an overcurrent condition to be absorbed by the conductor and that.