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UFS 3-501-01 05 June 2026 UNIFIED FACILITIES SUPPLEMENT (UFS) APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED ELECTRICAL ENGINEERING UFS 3-501-01 05 June 2026 FOREWORD Unified Facilities Supplements (UFS) provide non-mandatory, supplemental information in support of Unified Facilities Criteria (UFC). Only UFC establish enforceable criteria. UFS are For Information Only (FIO) and exist to help users understand and apply UFC requirements. The purpose of UFS is to offer procedural guidance, best practices, lessons learned, examples, and explanatory materials that clarify how to meet UFC criteria. They may include step-by-step procedures, checklists, illustrations, or decision aids, but they do not create new requirements or modify UFC content. UFS are developed by Discipline Working Group

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 • TP-12: UFC 3-500-10N Appendices – UFC 3-500-10N was developed by NAVFAC and was superseded by the initial issue of UFC 3-501-01.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 • TP-13: UFC 3-501-03N Load Demand Analyses – UFC 3-501-03N, Electrical Engineering Preliminary Considerations, was superseded by the initial issue of UFC 3-501-01.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 UFS 3-501-01 05 June 2026 29 Considerations. TP-13 was issued to retain the load demand analysis information originally contained in MIL-HDBK 1004/1. • TP-14. Reserved • TP-15: Arc Flash Calculations and Detailed Arc Flash Warning Labels – NFPA 70E requires a detailed arc flash warning label that specifies ei

e of the relative magnitude of the load. Refer to paragraph C- 2.3.2.5, Individual Loads, of this handbook. UFS 3-501-01 05 June 2026 53 Theoretical Relationship between Load Factor and Coincidence Factor at U.S. Naval Shore Establishments UFS 3-501-01 05 June 2026 54 Table C-8 Relationship between Load Factor and Coincidence Factor Load Factor (%) Coincidence Factor (%) Loads (hr/wk) Load Factor % Coincidence Factor (%) Loads (hr/wk) 40 60 40 60 1 2.5 1.5 51 73 69 2 7.5 4.5 52 73 70 3 12 8 53 73 70 4 17 11 54 73 70 5 21 14 55 73 71 6 25 17 56 73 71 7 28 20 57 73 71 8 32 22 58 74 71 9 35 24 59 74 72 10 38 26 60 74 72 11 41 29 61 74 72 12 44 32 62 75 73 13 46 34 63 75 73 14 49 36 64 76 74 15 51 38 65 76 74 16 53 40 66 77 75 17 54 42 67 77 75 18 56 44 68 78 76 19 57 46 69 78 76 20 59 48 70 7

aircraft maintained. Aircraft inspection occurs within the maintenance hangar. Table 7.2.38. Building Utility System Requirements for Maintenance Support Facility. System Requirements Mechanical Proper ventilation system and energy efficient HVAC system are required. Repair and reclamation shop requires 150-psi shop air and corrosion resistant drains. Applicable criteria include UFC 3-401-01 for mechanical. Electrical Industrial equipment typically requires 240- and 480-volt, three-phase electrical current. Use commercial grade convenience receptacles and special power outlets. 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, UF

oCAD format http://www.wbdg.org/ccb/NAVGRAPH/graphtoc.pdf. In situations where an applicable pole detail has not been developed, provide new detail drawings as required. For designer developed details, provide a level of detail equivalent to NAVFAC pole details and include material requirements. Refer to UFC 3-501-01 for additional pole detail requirements. 1-11 UNDERGROUND ELECTRICAL SYSTEMS. Not used. 1-11.1 Underground Distribution General Criteria. Not used. UFS 3-550-01 05 June 2026 3 1-11.2 Ductbanks. Not used. 1-11.3 Direct Buried Wiring Methods. Not used. 1-11.4 Directional Boring. Not used. 1-11.5 Underground Structures (Manholes and Handholes). 1-11.5.1 Manhole Drawing Details. Provide manhole foldout details or exploded views for all multiple-circuit primary systems and all prim

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

Section 2-1.1, “Hazardous Materials and Waste, and Controlled Materials”. 3-6.2 Arc Flash Analysis. 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 3-2.6, “Arc Flash Analysis”. Comply with the requirements of UFC 3-501-01, Section 2-1.12, “Arc Flash Warning Labels”. 3-6.3 Short Circuit Analysis. 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 calculation

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