At present, there are many brands of industrial plugs and sockets on the market, and the quality is definitely good or bad. So how can we choose products with high quality and low price?First, look at the brandThe quality of industrial plugs and sockets is very different. Many consumers have no way to distinguish the advantages and disadvantages of products, and the brand awareness of switch sockets is not wide enough, so some businesses have brought huge profits. In order to realize frequent commutation of NEMA wiring device, but to realize the braking during commutation and the acceleration after commutation, it is necessary to use the reversing device quickly and effectively. IP54, that is, dustproof level 5: it cannot completely prevent dust intrusion, but the amount of dust intrusion will not affect the normal operation of the product; Waterproof grade 4: prevent splashing water from invading, and prevent splashing water from all directions from invading. Socket A socket into which one or more circuit wires can be inserted, through which various wires can be inserted to facilitate connection with other circuits.Second, check the appearanceThe color of the panel should be uniform, free from sagging, noise, bubbles, stains and cracks. Deformation, scratch, shrinkage and other defects, five burrs, cracks, corrosion, rust and screw head damage of hardware parts.Third, weigh the weightYou should weigh the weight when buying industrial plugs and sockets. Merchants may choose thin copper sheets, which will feel lighter. Generally, the copper sheets and wiring terminals used in good industrial plugs and sockets are thicker, and the components are relatively heavy. The key part of industrial plugs and sockets is copper, and the key part to identify counterfeit and inferior products is copper. Consumers should also pay attention when purchasing: some bad manufacturers will add iron plates to their products to increase the weight. We must see clearly when purchasing.