Our Ultra Pwr extension cables go through rigorous testing in order to be 100% approved and ready to go for the UL standards (or international safety agency approvals) of extension cables.
The UL creates a set of standards and test procedures for equipment and product safety. All of Ultra Pwr cables go through the following serious of tests:
1. The hi-pot test. A hi-pot test will stress test the insulations of a cable. The voltage in these tests can either be AC or DC. The AC test must consider the effects of reactive and real current. The current that flows is equal to the voltage divided by the impendence when an AC voltage is applied.
2. The polarity test. This test is performed as part of the hi-pot test. This is a pretty standard test – A product with a polarized cord (2 prong plug or 3 prong plug) is properly connected.
3. The continuity test. This particular test is performed under high current, simulating a fault to earth. The test is administered by performing a DC or AC current between the conductive surface and protective earth.
4. The grounding test. The grounding test for a faulty ground connection and the hazards associated with a poor connection. A ground bond test is a high current AC test which measures the resistance of the ground path under high current conditions.
5. The insulation test. A test that is designed to measure how effective the insulation is in resisting the flow of electrical current.
6. The pull test. Think of this test as when you pull a wire upward (away from the ground) by a connector/hook until either the wire breaks or there is a bond failure. The connection between the blade terminal and the conductor shouldn’t break under a weight of 20-30 lbs. for one minute.
In addition to the above tests, extension cables also undergo:
Strain relief tests
Blade security tests
Heat shock tests
Physical properties tests
Ultra Pwr extension cables do not reach the consumer until all of the above UL standards requirements are met and passed.