Is it really important to plug the cable?
In accordance with the "construction of electrical engineering construction quality acceptance norms" GB-2002 regulations, wire pipe needs to be bridged, the purpose of bridging is to ensure continuity of the pipeline in the electrical and ensure reliable grounding of the pipeline to prevent leakage and accidents. The requirements are as follows: In Section 14.1.. the metal conduit and trunking must be grounded (PE) or zero (PEN) reliable and comply with the following: 1 galvanized steel conduit, flexible conduit and metal trunking Welding cross-connect ground wire to a special grounding card between the two cards connected to the copper wire for the soft wire, the cross-sectional area of ??not less than 4mm2; 2 when the galvanized steel pipe with threaded connection, the connection at both ends of the welding Grounding wire; when the galvanized steel pipe is threaded connection, the connection at both ends with a special grounding card fixed cross-connect ground; 3 metal trunking is not equipment grounding conductor, when the design requirements, the metal trunking full length Not more than 2 connected to the ground (PE) or zero (PEN) trunk; 4 non-galvanized metal wire between the ends of the connection plate across the copper wire, galvanized wire between the two ends of the connection plate Cross the ground wire, but the connection plate at both ends of not less than 2 with anti-loose nut or lock washers connecting bolts.
Jumper wire for the role of electrical conduction from the conduction of the potential; jumper for the two sections of the bridge junction, it plays the role of leakage protection; if a number of bridges connected to the jumper to prevent leakage when the bridge does not Other bridge connected to lead to leakage caused by personal harm, and ultimately there will be a ground wire to connect the bridge to the earth. hope this helps.
In the installation of electrical installations, when the metal wire protection tube of 1kV and below wiring works, the pipe and pipe or pipe and the box between the threaded connection, the pipe ends must be bridging the ground wire. Avoid loosening of the thread after a long period of time affecting the overall grounding of the pipeline.
