Openings may be provided in the bot

Openings may be provided in the bottom panels or in pans under areas containing materials not classified as V-1 or less flammable, in accordance with the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94, if constructed so that materials are prevented from falling directly from the interior of the product onto the supporting surface of any other location under the product. Figure 8.4 illustrates a type of baffle that complies with this requirement. A second construction that complies with this requirement is a 0.040-inch (1.02-mm) sheet-steel bottom panel in which 5/64-inch (2.0-mm) maximum diameter round holes are spaced not closer together than 1/8 inch (3.2 mm) center-tocenter. Other constructions may be used if they comply with Ignition Through Bottom-Panel Openings,Section 48