40 Cord Flexing Test40.1 A power su

40 Cord Flexing Test40.1 A power supply cord shall be subjected to the test specified in 40.2 – 40.5. As a result of the test, the cord shall withstand 20,000 cycles of flexing at the cord entrance to the product.40.2 Flexing is to be performed at a rate not exceeding 10 cycles per minute, unless agreeable to those concerned.40.3 Three samples are to be tested. Each sample is to be mounted so that the cord entrance point of the product is at the center of rotation. A 1-pound (0.40-kg) weight is to be attached to the cord between 3 feet (0.91 m) and 5 feet (1.52 m) from the cord entry point. Any additional cord beyond 5 feet is to be removed. Guides are to be provided 3 feet from the cord entry point to minimize bouncing or side-to-side motion of the cord. The weight is to be located so as not to interfere with the guides. When a short cord is employed, the additional length is to be obtained by using an attached cord set that the manufacturer makes available. If a cord retaining device is provided with the appliance, the device is to be removed for this test. See Figure 40.1.