The general information in this guide is intended to assist in evaluating the effect of solar radiation on outdoor metal-enclosed switchgear and is applicable to outdoor metal-enclosed power switchgear@ control switchboards@ and metal-enclosed bus. Specific data are given in current-temperature relationship and tabulation form for outdoor metal-enclosed low-voltage power circuit breaker switchgear@ outdoor metalclad switchgear@ and outdoor metal-enclosed interrupter switchgear.