UL-1678:2012 pdf free download – STANDARD FOR SAFETY Household, Commercial, and Institutional-Use Carts, Stands and Entertainment Centers for Use with Audio and/or Video Equipment.
16.1.3 A test platform or floor larger than the cart, stand or entertainment center shall be used and shall be level ± 0.2 degrees. The incline plane shall then be placed on or attached to the test platform.
16.2 Carts or stands intended to support or store audio and/or video equipment other than a television or having other general storage
16.2.1 A cart or stand shall not tip over when placed at the center of a plane inclined to make an angle of 10 ± 0.2 degrees with the horizontal. The test shall be repeated with any side of the cart, stand or entertainment center oriented toward the bottom of the incline plane.
Exception: If a stand is permanently marked as indicated in 24.6 to indicate that a side of the unit is to be placed against a wall or other fixed structure, the marked side is not to be oriented toward the bottom of the incline plane.
16.2.2 The test shall be conducted with all of the following:
a) The legs, wheels, casters, or similar means of support, arranged in the position most likely to result in tip-over and blocked so that the cart or stand does not slide on the inclined plane. The thickness of the mechanism employed to block casters or wheels shall be a maximum of 1/8th the diameter of the caster or wheel.
b) All doors, drawers and other movable or adjustable parts shall be positioned as they will normally be used. Doors which must be open to view a television or to remotely operate components shall be in the open position. Doors, drawers, and shelves that are intended for accessories such as tapes, headphones, digital discs, and similar accessories are to be secured closed so as not to open when placed on the incline plane.
c) Each of the remaining supporting surfaces not specified in 16.2.2 (b) shall be loaded as described in Table 14.1, or unloaded, whichever is most likely to result in tip over.
16.2.3 When loading shelves and drawers, the load is to be centered front to back and side to side on the surface and evenly distributed across the surface under test.
16.2.4 When a supporting surface is provided with a means to secure a product (such as straps, screws or similar securement means,), the securement means and any use and care instructions are to be used when positioning the load. The load is to be placed within the confines of the securement means in the position most likely to result in tip over.
16.3 Carts, stands and entertainment centers having a support surface or mounting surface for a television
16.3.1 A cart, stand or entertainment center intended for use with a television shall not tip over when placed at the center of a plane inclined to make an angle of 10 ± 0.2 degrees with the horizontal and loaded as specified in Table 14.1. Also refer to Section 16.2 when other storage and support surfaces are provided. The surface intended to support a television shall be loaded with the simulated television load described in 16.3.4. If the manufacturer specifies a television weight range, then the test is to be conducted with the heaviest weight television unless a lower weight television is determined to cause the cart, stand or entertainment center to be less stable.