This book contains 728 construction standards for transmission, distribution, and underground services. Every drawing is approved by the Rural Utilities Services. The library is organized into six categories: Distribution 12.47/7.2 kV; Distribution 24.9/14.4 kV; Transmission 69 kV and lower; Transmission 115 kV and higher; Subassemblies; and Underground Distribution. All drawings are the latest versions approved by RUS and use the new standard RUS numbering format. Example: C1.41L.