发布时间:2025-01-20 12:04:42
电缆套官的型号与电缆截面相关,也与成品外径.
一般来说,电缆的截面不得大于电缆套管的内截面40%.
电缆的截面=成品外径的平方*0.7854.
电缆套官的内截面=内径的平方*0.7854.
房子里装修完装开关的时候发现有一个开关是同时控制两个灯的能改成一个双开的开关分别控制这两个灯吗
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