Aluminum Bus Bar Ampacity Calculator

And b 317 00 aluminum alloy extruded bar rod pipe and structural shapes for electrical purposes for alloy 6101.

Aluminum bus bar ampacity calculator.

However these charts can only tell you so much. Area weight per ft in lb. Assume that required ampacity is 185 amps at 30 c rise. 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.

The aluminium bus bar widely used and most popular than copper busbar. There are a number of considerations that need to be recognized beyond the figures given in the chart. Understanding bus bar ampacity charts. Horizontal bar ampacity from industry sources.

30 c rise 50 c rise 65 c rise sq. Wire size awg or kcmil. 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. This article presents a brief overview of ampacity charts for both copper and aluminum bus bar and shows how to interpret the data within.

Vertical bar ampacity based on work by house and tuttle. For copper bus bar and half of that for aluminum. 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. Wire ampacity calculator enter the information below to calculate the maximum allowable ampacity for current carrying conductors.

Dc resistance at 20 c microhms ft. Knowing required ampacity determine possible bus bar dimensions from this table. The aluminium bus bar is cheaper than copper busbar but the resistivity of the aluminium busbar is high as compared with copper busbar. Space between bars is assumed equal bar thickness.

Then check the ampacity table to verify that size selected has the necessary ampacity. These include b 241 00 aluminum alloy seamless pipe and tube for alloys 6063 and 6061. 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. 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.

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. Afl aluminum bus conductors are manufactured to meet appropriate astm specifications. Bus bar ampacity table ampacities of copper bus bars alloy uns c11000 dimension in. Aluminium busbar current carrying capacity 0 8 busbar width thickness in amps.