Marine Electrical Power Systems:
Electric Power Load Analysis (EPLA):
Switchboard, Load Center, and Power Panel Capacity Sizing

Last Update: April 29, 2026

Essential Questions

Essential Question	Level of Thinking
What are the different load analysis methods applicable to determine switchboard, load center, and power panel capacity?	Understand
What are the impacts of non-fundamental frequency components and common mode components of load currents on switchboard, load center, and power panel capacity?	Understand
How should additional loads from automatic bus transfer switches transferring loads be considered in establishing switchboard, load center, and power panel capacity?	Understand

IEEE Std 45.1 IEEE Recommended Practice for Electrical Installations on Shipboard--Design

MIL-DTL-23928 Panels, Electrical, Power Distribution and Manual Transfer, Circuit Breaker Type

DPC 310-1 Electric Power Load Analysis (EPLA) for Surface Ships

Doerry, Norbert, "Shipboard power system limiting load flow and load flow analysis", IEEE ESTS 2025, Alexandria VA, August 5-8, 2025.

This work by Norbert Doerry is licensed under CC BY 4.0