Seeking advice on pump grounding knowledge
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I have a question: 1. According to the standards, the motor casing must be grounded. I noticed that in some facilities, not only is the motor casing grounded, but the base of the pump as well. Is it required by the standards that the pump base also be grounded? 2. May I ask whether static bonding wires should be installed at the joints of instrument cable trays in accordance with the standards? Are static bypass wires installed at the cable bridging joints? 3. For the wire conduits coming down from the cable tray, near the end of the motor, some companies connect them to the nearby frame using jumper wires, while others do not make such connections. What does the specification say regarding this? Thank you!
1. The base of mechanical pumps generally requires on-site grounding. 2. The instrument tray joints are connected using connectors and bolts, and generally, BVR copper-core wires are used for bridging the connections. 3. At the end of the wire conduit coming down from the bridge frame, as well as in the section leading to the building, a bolt can be welded there to connect it to the nearest grounding device. If you want to know the specific source, you can check the Code for Static Electricity Design in Chemical Industries and the Code for Acceptance of Electrical Engineering Construction
Do everything that can be done; don’t take shortcuts that could lead to accidents.
TN-S system； The cable trays need to be equipped with anti-static bonding wires, and there are special bonding wires available for this purpose
Hello – how exactly is grounding carried out for the pump base?
Hello, how exactly is grounding carried out for the pump base?
Half of it is connected to the grounding bolts of the pump base or to metal surfaces using 25*4 flat steel bars, and then it is connected to the grounding grid； I’ve also seen those that use yellow-green ground wires
1. Make a grounding lug using flat steel (65L*50W*6t) and weld it to the base; use a 35mm grounding wire with a copper clamp. The two are connected with 10M bolts. Some designs require grounding at 2 locations for the base. 2. To maintain electrical continuity, copper braid wires should be used for bridging at the connections of the cable trays, and yellow-green grounding wires should be used every 30 meters to guide the grounding network. 3. Some design requirements specify that cable conduits must also be grounded; the grounding method is to use gland caps with grounding bolts.