电线平方数直径电流功率数对照表演示教学.doc

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1、电线平方数直径电流功率数对照表__________________________________________________导体平方（mm2）  载流量（A） 额定功率（W）直径(mm) 0.5              6           10000.8 1                11          20001.13 1.5              14.5        28001.38 2.5              19.5        35001.78 4                26       

2、   50002.25 6                34          60002.76 10               46          80001.33*7 16               61          120001.70*7 25                80          160002.10*7 35               99          200002.50*7_____________________________________________________________

3、_______________________________________圆的面积公式。S=πR²__________________________________________________