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protective fuses on an electricity meter. • TP-11: UFC 3-500-10N Best Practices – UFC 3-500-10N was developed by NAVFAC and was superseded by the initial issue of UFC 3-501-01. TP- 11 provides the best practices information that was contained in UFC 3- 500-10N. • TP-12: UFC 3-500-10N Appendices – UFC 3-500-10N was developed by NAVFAC and was superseded by the initial issue of UFC 3-501-01. TP-12 provides appendices that were not included in UFC 3-501-01. • TP-13: UFC 3-501-03N Load Demand Analyses – UFC 3-501-03N, Electrical Engineering Preliminary Considerations, was superseded by the initial issue of UFC 3-501-01. UFC 3-501-03N contained in its entirety MIL-HDBK 1004/1, Electrical Engineering Preliminary Design CANCELLED UFC 3-501-01 27 November 2024 46 Considerations. TP-13 was issued

UFC 3-501-01 27 November 2024 UNIFIED FACILITIES CRITERIA (UFC) APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED ELECTRICAL ENGINEERING CANCELLED UFC 3-501-01 27 November 2024 This Page Intentionally Left Blank CANCELLED UFC 3-501-01 27 November 2024 UNIFIED FACILITIES CRITERIA (UFC) ELECTRICAL ENGINEERING Any copyrighted material included in this UFC is identified at its point of use. Use of the copyrighted material apart from this UFC must have the permission of the copyright holder. Indicate the Military Department Preparing Activity responsible for the document. U.S. ARMY CORPS OF ENGINEERS NAVAL FACILITIES ENGINEERING SYSTEMS COMMAND (Preparing Activity) AIR FORCE CIVIL ENGINEER CENTER Record of Changes (changes are indicated by \1\ ... /1/) Change No. Date Location This UFC supers

7.85 + 8 x 5 kW x 0.72 or 46.65 kVA. Summer to Winter load ratio = 46.65/39.68 or 1.18. Size the transformer for the summer load (39.68 kVA). Thus, each 50 kVA pad-mounted transformer must feed 4 duplexes. CANCELLED UFC 3-501-01 27 November 2024 50 This Page Intentionally Left Blank CANCELLED UFC 3-501-01 27 November 2024 51 APPENDIX C ELECTRICAL ENGINEERING PRELIMINARY CONSIDERATIONS Appendix C provides the preliminary design considerations information previously contained in UFC 3-501-03N, Electrical Engineering Preliminary Considerations, which has been superseded by UFC 3-550-01. UFC 3-501-03N contained MIL HDBK 1004/1, Electrical Engineering Preliminary Design Considerations. C-1 PRELIMINARY DATA C-1.1 Load Data. Before specific electric power sources and distribution systems can be c

Determine loads in kW. Determine winter and summer, types of electric loads separately. UFC 3-540-01 1 August 2014 Change 4, 16 January 2026 67 Table H-2 Electrical Load Types Load Type Notes Export See UFC-3-501-01 Plant See UFC-3-501-01 Switchgear See UFC-3-501-01 Line losses 12% of subtotal (unless more accurate data is available. Total present load Total of above Total ultimate load See UFC-3-501-01 (may be estimated by extending current load trend) Minimum continuous See UFC-3-501-01 (as for a summer night) Emergency load See UFC-3-501-01 (demand of services that cannot tolerate a 4-hour interruption) H-3.2.2 Steam. If steam is considered a requirement, then the following needs to be calculated as well. (Determine loads in kBtu/hr.) Determine winter and summer, types of steam load an

roperly. UFC 3-130-04 16 January 2025 27 CHAPTER 6 ELECTRICAL 6-1 GENERAL. Standard electrical system design criteria are suitable for buildings in Arctic and Subarctic regions because buildings are heated. However, some special consideration must be addressed. Comply with UFC 1-200-01, UFC 3-501-01, and the UFCs and government criteria referenced therein. 6-2 GROUNDING. Comply with UFC 3-501-01; UFC 3-550-01; and UFC 3-130-05, paragraph 11-2. UFC 3- 130-05 paragraphs 11-2 and A-11.2 provide additional information and resources on electrical grounding. 6-3 EXTERIOR LIGHTING AND CONTROLS. Comply with UFC 3-501-01 and UFC 3-550-01. Exterior wiring and lighting must be rated to −40°F (−40°C). Ensure NEC compliant circuit wiring and protection are provided for heat trace cables used for heatin

lash; • Electrical protection and coordination; and • Specialty analyses, such as power quality or Aurora evaluation. 8-1.2 UFC 3-501-01 Requirements. UFC 3-501-01 provides detailed requirements for electrical analyses and compliance is mandatory for the design of electrical systems at all facilities and installations. Upgrades or modifications to electrical systems to consider the design criteria in UFC 3- 501-01, but it is not intended that an entire facility or system require modernization solely because of a minor modification. Although UFC 3-501-01 does not specifically apply to an existing primary distribution system, apply its power system analysis criteria for exterior power distribution systems as supplemented by this UFC. UFM 3-550-07 12 March 2026 134 8-1.3 Software Requirements

ts of UFC 3-501-01, Section 3-2.4, “Short Circuit Analysis”. 4-6.4 Lightning Protection. Comply with the requirements of UFC 3-501-01, Electrical Engineering, Section 3-2.2, “Electrical Calculations Overview”, with the exception of the list of required calculations as outlined at the end of the referenced section. The only required calculations are short circuit, arc flash and lightning protection analyses. Comply with the requirements of UFC 3-501-01, Section 3-2.15, “Lightning Protection Calculations”. Comply with the requirements of UFC 3-520-01, Interior Electrical Systems, Section 3- 14, “Lightning Protection Systems”. UFC 1-201-01 4 March 2022 Change 4, 08 August 2023 75 4-6.5 Service Entrance and Distribution Equipment. Comply with the requirements of UFC 3-520-01, Interior Electric

tant drains. Applicable criteria include UFC 3-401-01 for mechanical & UFC 3-410-01 for HVAC. Electrical Industrial equipment typically requires 240- and 480-volt, three-phase electrical current. Use commercial grade convenience receptacles and special power outlets. Consult X-ray and other NDI equipment specifications for their specific power requirements. Applicable criteria include UFC 3-501-01 for general electrical requirements, UFC 3-520-01 for interior electrical systems requirements, UFC 3-530-01 for interior and exterior lighting and controls requirements, UFC 3-550-01 for exterior power distribution systems requirements, UFC 3-560-01 for electrical safety and electrical O&M requirements, UFC 3-580-01 for building telecommunications requirements, and UFC 4-021-01 for mass notifica