Enclosures shall have adequate mechanical strength and shall be so constructed as to withstand such rough handling as may be expected in normal use.

A steel ball of diameter 50 mm and weight 500 g is dropped from a height of 1300 mm on to the enclosure of the product.

A horizontal side is subjected to this test either by rotating the product 90° from its normal position, or by suspending the steel ball from a rope and allowing in to act like a pendulum, falling from a height of 1300 mm on to the side surface of the product.

After this test, the product shall not be damaged in any way that would cause a hazard. In particular, hazardous parts must not be accessible.