Classification regulations for bolt use parts

2023/07/28

1. Protective grounding: The outdoor primary wiring should be connected by hot-dip galvanized bolts. Commonly used bolts should have flat washers and spring washers. After the bolts are tightened, 2 to 3 bolts should be exposed. A bolt is equipped with 2 flat washers, a spring washer and a nut. When installing, place a flat washer on the side of the bolt head, place a flat washer and a spring washer on the side of the nut, and place the spring washer against the nut. 2. Fixed types of electrical equipment: transformers, power distribution cabinet bases and iron accessories are connected and fixed by using bad steel slope bolts, one bolt is equipped with one nut, and one inclined washer (for the bad steel slope side) and a flat washer (for side 2 in plan view). When using bad steel planar bolts to connect and fix, one bolt is equipped with two flat washers, one spring washer and one nut. When installing, place a flat washer on the side of the bolt head, place a flat washer and a spring washer on the side of the nut, and place the spring washer against the nut. The connection of knife switch, drop circuit breaker, high voltage arrester and iron accessories should normally use the installation bolts provided by the equipment manufacturer. 3. Fixed iron accessories: when the connecting bolt hole of the iron accessory is a round hole, one bolt is equipped with a nut and 2 flat washers; when the connecting bolt hole of the iron accessory is a long hole, one bolt is equipped with a nut and 2 For square washers, place a flat washer (square washer) on the bolt head side and the nut side respectively during installation. When multi-head bolts are used for the connection of maijin iron accessories, each end of the bolt is equipped with a nut and a flat washer (square washer). For the bolted connection on the vertical surface of the bad steel and I-shaped steel flanges, inclined washers should be used as much as possible to make the nut and the supporting surface at the top of the bolt head vertically bisect the extruder screw.

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