Marine Electrical Power Systems:
Electric Power Load Analysis (EPLA):
One Line Diagrams

Last Update: Aptil 9, 2026

Essential Questions

Essential Question Level of Thinking
What is a one-line diagram?
Remember
How is the one-line diagram used in an EPLA?
Understand
How does the level of detail depicted on a one-line diagram evolve during different stages of design?
Understand
What are the common symbols used in a one-line diagram?
Apply

Text Material

One-Line Diagrams ... (docx)

Presentation Material

One-Line Diagrams ... (pptx)

Electric Ship Power and Energy System Architectures ... (pptx)

Images

One-Line Diagram Figures

Video Material

References

ABS MVR ABS Rules for Building and Classing Marine Vessels

46 CFR Ch. I subpart 110.25 Code of Federal Regulations -- Plans and information required for new construction

U.S. Coast Guard Marine Safety Center, Review of Electrical One-Line Diagrams, Plan Review Guideline, Procedure Number E2-07.

Dalton, Thomas, Abe Boughner, C. David Mako, and CDR Norbert Doerry, "LHD 8: A step Toward the All Electric Warship", presented at ASNE Day 2002.

Herbert Engineering Corp., NSMV Phase 3 Design Electrical Single Line Diagrams," Document 2015-017-03-30, Prepared for U.S. Maritime Administration, Last update December 8, 2016.


(C) Copyright 2024,2026 Norbert Doerry

This work by Norbert Doerry is licensed under CC BY 4.0

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