| 摘要 |
PURPOSE: A construction method of a street light base with several earth connections is provided to prevent damage to or cutting of separate ground wires under construction, since separate ground wires are not projected to the outside of concrete blocks. CONSTITUTION: A construction method of a street light base with several earth connections comprises a wire(60) for supply, a wire(60') for extraction, a connecting ground wire(10) for supply, a connecting ground wire(10') for extraction, a fixed ground wire(12), a first conduit tube(20), a second conduit tube(20'), a fixed ground-pipe, a fixed ground copper coil(70), a connecting ground copper coil(30), and a concrete block(40). The wire for supply passes through the inside of the first conduit tube. The wire for extraction passes through the inside of the second conduit tube. The connecting ground wire for supply passes through the inside of the first conduit tube with the wire for supply. The connecting ground wire for extraction passes through the inside of the second conduit tube with the wire for extraction. The top of the fixed ground wire is connected to the wire inside the street light. The lower part of the fixed ground wire is installed on the lower surface of the concrete block to connect to the fixed ground copper coil. The fixed ground wire passes through the inside of the fixed ground-pipe. The wire for supply and the connecting ground wire for supply pass through the first conduit tube together. The wire for extraction and the connecting ground wire for extraction pass through the second conduit tube together. The fixed ground wire passes through the fixed ground-pipe. |
