The connection and assembly relationship between each screw, nut, spring washer, and flat washer should refer to the assembly guide book or assembly drawing. If the guide book does not clearly indicate it, the principle of ensuring the maximum contact plane and taking appropriate anti loosening measures should be followed.

The tightening torque of threaded connections shall refer to the "Thread Tightening Process Specification" (DKBA3242). For grounding and high current applications (such as in distribution boxes), pay attention to tightening and inspection according to the "high density connection".

When it is necessary to install two terminals simultaneously, in order to ensure the maximum contact area between all electrical connectors, appropriate installation methods should be used according to actual needs, and the larger terminal should be installed below and the smaller terminal should be installed above.

Even if the fastening screws and nuts may become loose in the future, the OT cold pressed terminal/UT cold pressed terminal should not have the possibility of contact with adjacent metal structural components due to rotation, and there should be no possibility of contact between the OT terminals/UT terminals in the accessories. At the same time, it is necessary to ensure that there is sufficient electrical gap between them. The electrical connection between the structural components and the OT/UT terminals must be protected by spraying to ensure that there are no insulating substances such as paint, The diameter of the spray protection area (electrical contact area) must be greater than the size of the OT/UT terminal head. The overlap resistance between each OT/UT terminal must be less than or equal to 0.1 ohms.

For OT terminals, screws that match their specifications should be used to tighten them. For example, the "bare crimp end - OT type -25-6" should be tightened with M6 screws to ensure the maximum contact area.

The engagement between screws and metal plates, metal nuts, or metal inserts should have at least two full threads to ensure the reliability of the connection