45.7 For dual-rated devices, a test on ac can be waived if acceptable results have been obtained from an equivalent or higher volt-ampere test at a dc potential that is equal to or greater than the ac potential rating.45.8 During the test, no sustained arcing shall occur. After the test, the devices shall not show:a) Wear impairing in the further use of the device;b) Deterioration of enclosures or barriers;c) Damage to the entry holes for the plug contacts that might impair proper working;d) Loosening of electrical or mechanical connections.