Guidance on the use of outdoor power apparatus bushings is provided in this document. The bushings are limited to those built in accordance with IEEE Std C57.19.00TM-1991 (not the latest revision).1 The latest revision@ IEEE Std C57.19.00TM-2004@ does not address the use of condenser bushings in oil circuit breakers and several voltage classes were dropped that are still in use. Purpose The purpose of this guide is to present general information and recommendations for the application of power apparatus bushings when incorporated as part of power transformers@ power circuit breakers@ and isolated-phase bus. The loading model developed in this guide is based on oil-impregnated@ paperinsulated@ capacitance-graded bushings. Similar loading models could be developed for other bushing constructions. 1 Information about references can be found in Clause 2.