CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.
As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
i
Electrical Task Analysis Document : Conduit Installation, Wire Pulling, and Termination
-
February 2024
[PDF-1.49 MB]
Details:
-
Corporate Authors:
-
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." - NIOSHTIC-2
NIOSHTIC no. 20069223
Disclaimer: Development of this document was supported with funding from a cooperative agreement between CPWR - The Center for Construction Research and Training (#U60 OH009762) and the National Institute for Occupational Safety and Health (NIOSH). CPWR provides this document at no cost to the user. Please note that this document is not intended as legal advice and is not for the purposes of complying with any federal, state, or local standard or regulation. Content in this document has been developed by CPWR and does not necessarily represent the official views of NIOSH.
ETA-Conduit_Installation_Wire_Pulling_Termination.pdf
-
Funding:
-
Pages in Document:18 numbered pages
-
NIOSHTIC Number:20069223
-
Resource Number:Cooperative-Agreement-Number-U60-OH-009762
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
