糖心免费视频,糖心APP官网进入,糖心APP污视频,成人糖心VLOG视频

Visual inspection

Manufacturing drawings and enterprise standards (technical conditions)

External dimensions and weight

Installation and connection dimensions

Electrical clearance and creepage distance

GB3836.3-4.3, 4.4 Interphase and shell to shell after wiring, Table 4 of GB3836.4

Interlocking devices and warning signs

GB3836.1-10 Special Tool Interlocking Devices

Fasteners

GB3836.1-9 Anti loosening, perforation exposure, and blind hole retention

Coating, paint

Corrosion resistance and arc resistance

Internal and external grounding

GB3836.1-15 Symbols, Materials, and Dimensions

connection

Reliable connection, neat arrangement, and distinct colors

Mechanical testing

GB3836.1-23.4.3 Impact and drop (some products and parts)

Shell protection performance test

GB3836.1-23.4.4 (Explosion proof type not tested)

Connection torsion test

GB3836.1-23.4.5 (torque action)

Temperature test

GB3836.1-23.4.6 Surface temperature, thermal stability of plastic shell, transparent parts of lighting fixtures

Measurement of insulation resistance of plastic shells

Thermal upheaval

Reference device clamping test

GB3836.1-7.3.1

Damp heat test

GB3836.1 Appendix D Clamping Action and Mechanical Strength

Rubber component aging test

Appendix C of GB3836.1 Alternating Damp Heat Test

GB3836.1 Appendix D: The change in Shore hardness after aging shall not exceed 20%