Galvanized cable tray has become a commonly used cable tray in the market because of its wide range of applications and low cost. However, many people will ask whether the galvanized bridge needs to be jumper? The answer is needed. Next, Jinan Bridge manufacturer will explain it for you.
The material of galvanized bridge is "electro galvanization", that is, put the steel plate into the electroplating solution (including zinc oxide) after chemical cleaning. After being electrified, 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 shell 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 the metal cable tray and its support shall be connected with the 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 by copper core ground wire, and the minimum allowable cross-sectional area of the ground wire shall not be less than 4 mm2;
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 locknuts or lock washers.
The above is the answer to the question of whether the galvanized bridge needs to be jumper, and the answer is yes. The reason is to prevent current leakage or backflow, in short, 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 http://www.sddlqj.cn ！