Galvanized cable tray has become a common cable tray in the market because of its wide application range and low cost. However, many people will question whether there is a need for jumper wires for Shandong galvanized bridge? The answer is needed.
Shandong cable tray
The material of galvanized bridge is "electro galvanized", that is, after chemical cleaning, put the steel plate into electroplating solution (including zinc oxide). After energization, zinc molecules ionize and adhere to the surface of the steel plate to form a galvanized bridge.
Jumper wire is a line connected to the enclosure of electrical equipment, which is used to output unsafe charge or leakage current caused by various reasons in time. Since the galvanized cable tray is made of metal and has certain conductivity, in order to prevent current from flowing on the galvanized cable tray due to leakage or other reasons, it is usually bridged on the cable tray.
1. The total length of metal cable tray and its support shall be connected with grounding (PE) or neutral (pen) trunk line at least 2 places;
2. Both ends of the connecting plate between non galvanized cable trays shall be connected with copper core ground wire, and the minimum allowable cross-sectional area of the ground wire shall not be less than 4mm2;
3. The two ends of the connecting plate between galvanized cable trays shall not cross the grounding wire, but the two ends of the connecting plate shall not be less than 2 connecting and fixing bolts, and shall be equipped with anti loose nuts or anti loose washers.
The above is the answer about whether there is a need for jumper wire for Shandong galvanized bridge. The answer is yes. The reason is to prevent current leakage or backflow. In short, it is for safety. I hope this article can help you. If you want to know more about bridge, please continue to pay attention to our website!