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This article focuses on power cord testing procedures in details based on our manufacturing and production. Because the previous What’s Power cord manufacturing process only lists some quality control points, you can also refer to this article for general understanding of the power cord testing doped in each production process.
A pull force test is required after the blade terminal and the conductor are crimped and connected together, which is a pulling test until there is either connection failure or the conductor wire breaks.
UL817 standards Each conductor shall be fastened to the terminals of fittings in a manner that:
a) Keeps strands of any conductor from contacting either uninsulated live parts of opposite polarity or dead metal parts.
b) Provides mechanical security in accordance with Conductor Secureness Test, Section 81.
c) Provides adequate ampacity in accordance with Temperature Test, Section 87.
d) Keeps strands from surfacing in a molded-on fitting.
Hipot Test is short name of high potential (high voltage) Test.
Hipot test is an insulation test to ensure that current does not flow from one point to another point where it should not flow( turn up the voltage really high just to make sure no current will flow).
Hipot testing will help find damaged insulation, corrosive contaminants around conductors, terminal spacing, and tolerance errors in cables, etc.
Polarization and Continuity test makes surety of the conductors are connected to the intended terminals of the fittings and there is electrical continuity throughout the entire length of the conductor/contact assembly.
According to the requirements in the Standard for Tests of Flammabilityof Plastic Materials for Parts in Devices and Appliances, UL 94, a polymeric material used in the fittings of a cord set or power-supply cord shall have a minimum flammability rating of HB.
Power cords from Qingmin meet the requirements under UL standards,once they pass all of these important tests before shipment.
Hi, I’m the author of this post, and I have been in this field for more than 10 years. If you want to wholesale UL/cUL power cords or custom power cords, feel free to ask me any questions.
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