Professional Custom Lamp Holder Accessories Manufacturer

⑴, Appearance:
A, lamp holder appearance of the coating should be uniform, bright and firm, without peeling phenomena such as flooding and the inner surface of the coating and corrosion may not have exposed at the end of the phenomenon;
B, head surface should be clean, not a variegated, Pseudomonas, sludge, plating traces or heavy water stains spots;
C, iron lamp holder housing should not have wrinkles, defects and significant deformation;
D, head of the insulator shall not affect the mechanical strength and electrical properties of cracks and defects. Spot pattern is not obvious not exceed 2mm,
Crack defects must not exceed 1mm
⑵, size: ①, diameter (inside and outside), height and other dimensions as shown below and the table must meet gauge (pass, stop) requirements; unscrew the gauge, the head spin laps should fall.
⑶, Electric Strength: Base contact piece and the shell under normal weather conditions (25 ℃ ± 10 ℃, humidity 45-75%) should be able to withstand 1500VAC / 1 (1800VAC / 1 sec) Dielectric strength test, not a discharge breakdown phenomenon.
⑷,E26 lampholder insulation resistance: the lamp holder cap contact piece and the shell, the insulation resistance,
Under normal weather conditions (25 ℃ ± 10 ℃, humidity 45-75%), not less than 50MΩ.
⑸, wet test: carried out in a humid chamber, the sample into the chamber, before the
45 ℃ ± 2 ℃ under the conditions of storage 2h, after the sample temperature is stable at a temperature of 40 ℃ ± 2 ℃, relative humidity
90% -95% of the conditions to maintain after 40h, the outer surface there should be no corrosion phenomenon.