Electrical Task Analysis Document: Conduit Installation, Wire Pulling, and Termination

Details

• Journal Article:
  Electrical task analysis document: conduit installation, wire pulling, and termination
• Corporate Authors:
  CPWR--The Center for Construction Research and Training
• Description:
  What is this document for? This document contains task-specific conditions and recommendations compiled from onsite observations and interviews with electrical workers and industry practitioners. It addresses safety and health hazards as well as production challenges associated with the task. This document can be used for training, hazard analysis, and pre-task planning. This information was gathered from new construction projects including a data center, a multi-use office building, a commercial distribution warehouse, and a gas-insulated substation, as well as retrofit projects including a public museum and an office building. Task Description: Conduit installation, wire pulling, and termination are interdependent tasks that must be carried out in a specific sequence to ensure the safety and functionality of the electrical system. They typically involve the following: Conduit Installation is the process of installing conduit pipes overhead, along the walls, or underground. It involves measuring, cutting, and bending conduit pipes to certain angles specific to a job layout. Equipment for this task may include manual/hydraulic benders and ladders/lift equipment. It also involves planning pathways for conduit runs from the main power source and connecting into junction boxes and electrical equipment. Wire Pulling is the process of pulling electrical wire through conduit. It involves tying a "head" or "nose" on the end of the wire and then attaching it to an adequately rated nylon/polyester cord or string (a.k.a. "mule tape") that is either pushed through the conduit or sucked through using a shop vacuum. The nylon/polyester cord or string is then used to guide the wire inside and through the length of conduit. Wire pulling can be physically demanding, especially when the wire is heavy or there are multiple bends in the conduit. Termination is the process of terminating wires, which involves cutting, stripping, and fastening lugs or crimps on the ends of wires or cables to prepare them for a secured connection. Terminations can be within junction boxes, electrical panels, main electrical switchgear, or any other electrical equipment. Before beginning work, circuits must be identified and marked to verify that each one is terminated in the correct location. Mechanical tools such as cable strippers provide a safe way to strip the insulation from the end of the wire before terminating. Description provided by NIOSH
• Subjects:
  • Construction Industry
  • Electricity
  • Occupational Health
  • Safety
  • Staff Development
• Keywords:
  • Electrical workers; Electrical systems; Training; Construction; Ladders; Electrical safety
• Source:
  Silver Spring, MD: CPWR-The Center for Construction Research and Training, 2024 Feb; :1-28
• Series:
  CPWR - Center for Construction Research and Training Publications
• Document Type:
  Text
• Funding:
  NIOSH cooperative agreement
• Genre:
  Guidance
• Place as Subject:
  Maryland ; OSHA Region 3
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  29 pdf pages
• NIOSHTIC Number:
  nn:20069223
• Federal Fiscal Year:
  2024
• NORA Priority Area:
  Construction
• Performing Organization:
  CPWR - The Center for Construction Research and Training, Silver Spring, Maryland
• Peer Reviewed:
  False
• Download URL:
  https://stacks.cdc.gov/view/cdc/156488/cdc_156488_DS1.pdf
• File Type:
  [PDF - 1.49 MB]
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:70eae03de4c4db438173d366ec4ab464d143195c66c1969b386fdd5cb4451fe34cf9153aea076a982c7baadae0db806518d19491edda8ee9521ef5dcbc72de39