The screw - shell of plug - fuse type fuseholders and the contact of a post - extractor fuseholder adjacent to the mounting surface ( unless the post - extractor fuseholder is of deadfront construction ) shall be connected to the load side of the circuit 临近盘面安装的插拔式保险管座的拧动式外壳和柱状拔出式保险管座的接头应该接到电路的负荷端上
