Today we’ll be discussing the various “testing” cords must go through in order to be 100% ready to go and meet the requirements for the UL standards (or international safety agency approvals) of cord sets and power cord supplies.
UL generates standards and test procedures for products and equipment focusing on product safety. Power cords undergo some of the most common tests:
- A grounding test. The purpose of a grounding test is to protect the consumer from hazards that can be caused by a faulty ground connection. A ground bond test is a high current AC test that measures resistance of the ground path under high current conditions.
- The continuity test is carried out under high current, simulating a fault to earth. This test is performed by applying an AC or DC current between the conductive surface and protective earth.
- There is a hi-pot test. This is a stress test of the insulation of a device under test DUT (Device Under Test). This means the voltage used in a hi-pot test can either be AC or DC.