station service transformers shall be dry type, equal to Westinghouse Type AVR. Outdoor distribution transformers shall be oil immersed, self-cooled, 15-39. Before installing transformers, Material Type "RW". TRANSFORMERS: check oil for moisture, equal to Line core for loose connections and excess heating, and insulators for tightness. 15-40. When facing the direction the power is coming from, the transformers of a three (3) phase bank shall be named from right to left, "A", "B", "c". 15-41. Unless otherwise indicated on the plans, primary fuse size for single phase transformers shall be as follows Transformer Fuse Size in in_Amperes 3 5 5 5 7.5 3 10 LO 15 15 25 25 37.5 25 50 40 15 30 100 #5 150 100 SAFETY: 15-42. Safety is of primary importance in the construc- tion of power lines. For this reason it is important that the lineman understand the principles of this type of construction. 15-8