Crimping inspection

1. Use appropriate cold pressed terminals according to the conductor section, and the corresponding specifications are required to be identical.
2. The length of stripped wire insulation layer shall meet the requirements and the length shall be correct.
3. All metal wires of the conductor shall be completely wrapped in the cold pressed terminal without scattered copper wires.
4. The crimping part shall meet the requirements and the crimping part shall be correct.
5. For the strength inspection after crimping, use the calibrated spring tension and compression tester to verify the crimping quality.
6. Inspection of crimping tools. The crimping tools must meet the requirements of fixing strength and be verified every three months. The tools that meet the requirements shall have labels indicating their validity period.
7. Wiring binding: at least once every 400 ~ 500mm during wiring binding.

Wire nose (DT) is often used for cable end connection and continuation, which can make the connection between cable and electrical appliance more firm and safer. It is a common material for construction, power equipment, electrical connection and so on. When the general conductor is connected with the wiring terminal, the corresponding wiring connection terminal shall be used for the cable end connection according to the requirements of the national wiring code. And if it’s 4mm ² The above multi strand copper wires need to be equipped with a wiring nose and then connected with the wiring terminal. The product has good appearance specification, good conductivity and safety.

“The rated current carrying capacity of 4m2 copper wire is clearly specified in the national standard GB / t4706.1-2005, which is 25 ~ 32A – allowable error in the national standard, so this specified value is an interval. Therefore, as long as it is a qualified 4 square wire, its rated ampacity will not be less than 25A.

in practical application, due to the adverse factors such as poor ventilation, poor heat dissipation, high humidity and high temperature, the actual current carrying capacity of concealed wires usually needs a 85% discount on the basis of rated current carrying capacity. Therefore, the actual current carrying capacity of 4 square wires will not be less than 21a.”

The copper pipe nose is generally made of T2 red copper and brass. The appearance of the product is a round head of a pot shovel. The top side is a fixed screw edge and the end is a stripped copper core of wires and cables. The varieties are divided into oil blocking type and pipe pressure type. The oil blocking type is better. In order to resist air oxidation, there is tin plating, that is, a layer of tin is plated on the surface of the copper ear to prevent oxidation and blackening, The copper wire lug shall be used only for wires larger than 10 square meters, and the cold pressed wire nose shall be used instead of the copper wire lug for wires smaller than 10 square meters. Copper wire lug can be divided into surface tinned and non tinned tube pressure type and oil plugging type. DT copper tinned terminal is to coat a layer of “tin” on the surface layer on the basis of the original DT copper terminal to enhance the conductivity of DT copper terminal.

“Main application scope of copper tube nose: it is widely used in machine tools, textile machinery, motors, railways, ships, electronic control, household appliances, electrical industry, mechanical equipment factory, shipyard, power distribution cabinet, power distribution instrument, computer and household appliances.

The product has good appearance specification, good conductivity and safety
Application: it is applicable to the connection between copper conductor of electrical cable wire with nominal section of 10-800 square meters and electrical equipment
Product features: long term working temperature – 55 ℃ – 150 ℃, surface tin plating.”

Post time: Sep-11-2021