Transmission line installation is a complex job that requires extensive planning, careful coordination or manpower and equipment, and a thorough mastery of construction procedures and techniques. This training program focuses on the part of that job involved with installing conductors on a structure.
The tasks that are covered included planning the job, pulling wire, sagging wire, and clipping-in, which is the process of permanently attaching a conductor to a string of insulators.
SUBJECTS AND OBJECTIVES
- Explain some of the basic considerations for planning a transmission line installation job.
- Describe or demonstrate how to determine the length of wire needed for stringing, how to calculate the average span length, and how to calculate a ruling span.
- Explain what guard structures are and when they are used.
- Explain the basic preparation necessary for stringing wire.
- Describe some of the basic equipment that must be assembled in preparation for stringing wire.
- Explain where the equipment necessary for stringing wire is generally placed on the section of line being strung.
- Explain why it is important to pull wire under tension.
- Describe or demonstrate how a pilot line is pulled into position.
- Describe or demonstrate how a bull line is pulled into position.
- Describe or demonstrate how a conductor is pulled into position.
- Explain the basic concerns associated with the pulling process.
Sagging, Part 1
- Explain the purpose of sagging wire and basic considerations that must be taken into account when sagging wire.
- Explain the preparations that must be made in order to sag wire.
- Describe or demonstrate how a dynamometer can be used for sagging wire.
Sagging, Part 2
- Describe or demonstrate how a transit or a sagging scope can be used for sagging wire.
- Describe or demonstrate the stopwatch method of sagging.
- Demonstrate and explain the basic process of clipping-in.
- Identify some additional items that may be installed on transmission lines.