COURSE DESCRIPTION

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.

COURSE GOALS

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

Job Planning

• 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.

Job Preparation

• 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.

Pulling Conductor

• 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.

Clipping-In

• Demonstrate and explain the basic process of clipping-in.
• Identify some additional items that may be installed on transmission lines.