g) R – Rupture (of DUT enclosure ex

g) R – Rupture (of DUT enclosure exposing hazardous parts as determined by 5.3.3);h) P – Loss of protection controls.27 Impact Test27.1 The purpose of this test is to evaluate the mechanical integrity of the enclosure and its ability to provide mechanical protection to the EESS contents.27.2 A fully charged sample (MOSOC per 6.1) is to be subjected to a minimum of three impacts of 6.8 J (5 ft-lb) on any surface that can be exposed to a blow during intended use. The impact is to be produced by dropping a steel sphere, 50.8 mm (2 inches) in diameter, and weighing 535 g (1.18 lb) from a height, H, of 1.29 m (50.8 in). For surfaces other than the top of an enclosure, the steel sphere is to be suspended by a cord and swung as a pendulum, dropping through the vertical height of 1.29 m (50.8 in), with the product being impacted placed against a restraining vertical wall. See Figure 27.1. A different sample may be used for each impact.