20. 31 1077 Rev. D – Substation Standards Ground Cable on Tubular Steel Structures Support Details 21. 31 1078 Rev. C – Floodlighting Units 22. 31 1079 Rev. C – Substation Standards Danger Sign for Shunt Capacitors 23. 31 1081 Rev. E – Substation Standards Stacit Post Insulators 24. 31 1085 Rev.