Copper Bus Pipe Ampacity

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.

Copper bus pipe ampacity.

Ampacity of the bus bar selected must then be verified by checking table 1. Ampacities and mechanical properties of rectangular copper busbars. There are a number of considerations that need to be recognized beyond the figures given in the chart. Current rating in amperes 1.

Quick busbar selector knowing the ampacity designers and estimators can get the approximate bus bar size. Dc resistance at 20 c microhms ft. Direct current ampacities may differ from ac ampacities because of ac skin effect. Bus bar ampacity table ampacities of copper bus bars alloy uns c11000 dimension in.

Substation supply company design data current ratings for bare copper tubular bus 2. Ampacities of copper no. For seamless bus tubing over 6 inches see page 618. Seamless bus pipe is generally made of 6063 t6 alloy in ansi schedule 40 pipe because of its excellent mechanical and electrical properties.

B 241 seamless pipe note. Then check the ampacity table to verify that size selected has the necessary ampacity. 6 30 2009 11 15 16 pm. Copper ampacity charts xls author.

Area weight per ft in lb. Skin effect ratio at 70 c. Knowing required ampacity determine possible bus bar dimensions from this table. Ampacities and mechanical properties of rectangular copper busbars.

Understanding bus bar ampacity charts. Ampacities of copper no. Of tube wall thick. Skin effect ratio at 90 c.

However these charts can only tell you so much. 30 c rise 50 c rise 65 c rise sq. Of tube size of tube ips. Table gives bus bar cross section which will probably be large enough for ampacities within each range.

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. Brian teal created date. This article presents a brief overview of ampacity charts for both copper and aluminum bus bar and shows how to interpret the data within. 30 c rise 50 c rise 65 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. Standard pipe sizes extra heavy pipe sizes current rating in amperes outside inches inside inches outdoor indoor size of tube ips. 6061 t6 alloy tubular bus is used where high strength and lower conductivity are required. Assume that required ampacity is 185 amps at 30 c rise.

Ampacities of copper no.