IEEE Std C37.74-2014 pdf download - IEEE Standard Requirements for Subsurface, Vault, and Padmounted Load-Interrupter Switchgear and Fused Load-Interrupter Switchgear for Alternating Current Systems up to 38 kV. 4.1.2 Outdoor DSG Subclause 2.1.2 of IEEE Std C37.100.1-2007...