Official Course Description: MCCCD Approval: 04/23/96
ABA251 19964-99999 LEC 1 Credit(s) 1 Period(s)
High Voltage Termination and Splicing
Terminations and splices in high voltage systems (600+ volts). Identifying and splicing specific types of cables and making terminations. Includes using splicing kits and following manufacturer's specifications. Testing techniques and calculations. Prerequisites: (Indentured status with the Arizona Builders Alliance and ABC223) or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABA251   19964-99999 High Voltage Termination and Splicing
1. Define terms related to high voltage electrical cable and identify specific types of high voltage power cables, their insulation, jacket, shield and wire characteristics. (I, II)
2. Explain reasons for splicing, step-by-step procedures for performing specific types of splices and splicing precautions. (III)
3. Describe specific classes of terminations, the role of stress control, grounding terminations and external environmental factors. (IV)
4. Describe High Potential (Hipot) testing, the specific categories of Hipot testing and calculate results using specific formulas. (V)
5. Describe "go-no-go" testing, including the step-by-step procedures, and calculate test results using the insulation resistance formula. (V)
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MCCCD Official Course Outline:
 
ABA251   19964-99999 High Voltage Termination and Splicing
    I. Introduction
        A. Terms and definitions
          1. American wire gage
          2. cable, armored
          3. cable, belted
          4. cable, duplex
          5. cable, parkway
          6. conductor
          7. hi-pot test
          8. shield
          9. other
        B. Straight splices
      II. High voltage power cable
          A. Common cable types
            1. ribbon tape shielded
            2. drain wire shielded
            3. cable unishield
            4. concentric neutral
            5. jacketed concentric neutral
          B. High voltage cable components
            1. concentric stranding (class B)
            2. compressed stranding
            3. compact stranding
            4. solid wire
          C. Strand shielding
          D. Insulation
            1. 100 percent
            2. 133 percent
            3. 173 percent
          E. Insulation shield system
          F. Jacket
        III. Splicing
            A. Splicing need
            B. Splicing steps
              1. prepare the surface
              2. join conductors with connectors
              3. reinsulate
              4. reshield
              5. rejacket
            C. In-line tape splice
              1. prepare cable
              2. connect conductors
              3. apply primary insulation
              4. apply outer sheath
            D. Tee tape splice
            E. Quick in-line splicing kits
              1. prepare cables
              2. install splice
              3. install shield continuity assembly
              4. install PST cold-shrink insulators
              5. ground splice
          IV. Terminations
              A. Classes
                1. class 1
                2. class 2
                3. class 3
              B. Stress control
                1. geometric stress control
                2. capacitive stress control
              C. External leakage insulation
              D. Seal to the external environment
            V. Hi-pot testing
                A. Test function and Description
                B. Use of direct current
                C. Test types
                  1. design
                  2. factory
                  3. acceptance
                  4. proof
                  5. maintenance
                  6. fault locating
                D. Methods of application
                  1. leakage current
                  2. current vs. time
                E. Selective guard circuits
                F. Connections
                  1. safety procedures
                  2. step-by-step procedures
                  3. reading the results
                G. Selective guard circuit connections
                  1. metered return
                  2. bypass return
                  3. grounding switch
                H. Corona guard ring and corona shields
                I. Detailed operating procedure
                J. Go-no-go testing
                K. Insulation resistance measurements
                  1. formula R=E/I
                  2. vibrotest
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