This loading guide applies to ac high-voltage air switches in excess of 1000 V rated in accordance with IEEE Std C37.30-1992.1 This standard does not apply to switches used in enclosures covered by IEEE Std C37.20.2-1993, IEEE Std C37.20.3-1996, IEEE Std C37.23-1987, IEEE Std C37.71-1984, and ANSI C37.72-1987. Moreover, interrupter switches covered by IEEE. PC37.39 are excluded from the scope of this standard. If an air switch is equipped with a load-break device or interrupter, it may not successfully interrupt currents above the nameplate rating. The purpose of this guide is to aid users and manufacturers in the determination of: a) The allowable continuous current class (ACCC) designations. b) The continuous load current capabilities of air switches under various conditions of ambient temperature. c) The emergency load current capabilities of air switches under various conditions of ambient temperature. Revision Standard - Superseded. An aid to users to determine (1) the allowable continuous current class (ACCC), (2) the continuous load current capabilities of air switches under various conditions of ambient temperature, and (3) the emergency load current capabilities of air switches under various conditions of ambient temperature, is provided. This guide does not apply to switches used in enclosures covered by IEEE Std C37.20.2-1993, IEEE Std C37.20.3-1996, IEEE Std C37.23-1987, IEEE Std C37.71-1984, and ANSI C37.72-1987. (Superseded by IEEE Std C37.30.1-2011)