Ask a compliance question

UFM 3-550-07 12 March 2026 UNIFIED FACILITIES MANUAL (UFM) APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED OPERATION AND MAINTENANCE (O&M): EXTERIOR POWER DISTRIBUTION SYSTEMS UFM 3-550-07 12 March 2026 FOREWORD Unified Facilities Manuals (UFM) provide non-mandatory, informational guidance in support of Unified Facilities Criteria (UFC) with a specific focus on facilities operations, and maintenance. Only UFC establish enforceable requirements. UFM are For Information Only (FIO) and exist to help users understand and apply UFC requirements. The purpose of UFM is to share operational procedures, maintenance practices, and practical examples that support effective implementation of UFC criteria during operations and maintenance activities. UFM may include recommended procedures, checklis

le and safe electrical power distribution system. Document coordination studies in UFM 3-550-07 12 March 2026 142 accordance with UFC 3-501-01. Include protective device settings and fuse sizes in the documentation. Apply the coordination criteria listed in Table 8-1. The criteria apply to the following: • Overcurrent relays; • Recloser control units; • Pad-mounted switchgear containing vacuum fault interrupter (VFI) trip units; • Pad-mounted switchgear containing fuses; • Overhead distribution fused cutouts; • Low voltage circuit breaker electronic trip units; • Low voltage circuit breaker thermal-magnetic trip units; and • Low voltage fuses. UFM 3-550-07 12 March 2026 143 Table 8-1 Electrical Protection and Coordination Criteria Upstream Device Downstream Device Criteria Relay or Reclose

-7) is a configuration using several of the above mentioned configurations. This allows many options and many configurations. However, this flexibility, because of complexity, requires a cybersecurity certified SCADA (Supervisory Control And Data Acquisition) system and highly trained operators to control feeders, monitor status, control breakers, and report maintenance issues. UFM 3-550-07 12 March 2026 12 Figure 2-7 Network Model UFM 3-550-07 12 March 2026 13 CHAPTER 3 DEVELOPING AN O&M PROGRAM 3-1 TRAINING. 3-1.1 Qualifications of Test Operators. Test operators must be thoroughly familiar with the test equipment used in the type of test being performed, and sufficiently experienced to detect any equipment abnormalities or questionable data during the performance of the tests. All qualif

NG CO INC, LANCASTER, PENNSYLVANIA Wastewater Engineering Design for Unsewered Areas, by Rein Laak, 1986, UFM 3-240-03 17 February 2026 100 UNIFIED FACILITIES CRITERIA https://www.wbdg.org/dod/ufc UFC 1-200-01, DoD Building Code UFC 3-230-01, Water Storage and Distribution UFC 3-420-01, Plumbing Systems UFC 3-600-01, Fire Protection Engineering for Facilities UFM 3-601-02, Fire Protection Systems Inspection, Test, and Maintenance UFC 4-010-06, Cybersecurity of Facility-Related Control Systems UFM 3-230-02, O&M: Water Supply Systems UFM 3-540-07, Operation and Maintenance (O&M): Generators UFM 3-550-07, Operation and Maintenance (O&M): Exterior Power Distribution Systems UFM 3-560-01, Operation and Maintenance: Electrical Safety UFM 3-570-06, Operation and Maintenance: Cathodic Protection S

ce of Defense Cooperation APO AE 09822 United Kingdom COMUSAFE APO AE 09094 3 AF/CV Unit 4840 APO AE 09459- 4840 3 AF-UK/JA Unit 4840 APO AE 09459- 4840 Commander Burtonwood Army Depot APO AE 09448 Commander Naval Activities United Kingdom FPO AE 09499 Zimbabwe USDAO Harare Department of State 2180 Harare Place Washington, DC 20521-2180 31 AE Reg 550-50/CNE-C6F Inst 5820.8K/USAFE Inst 51-706 ● 26 Nov 07 APPENDIX D SAMPLE AE FORM 550-50A Figure D-1 shows the front and back of a sample completed AE Form 550-50A. Figure D-1. Sample AE Form 550-50A 32 AE Reg 550-50/CNE-C6F Inst 5820.8K/USAFE Inst 51-706 ● 26 Nov 07 Figure D-1. Sample AE Form 550-50A—Continued 33 AE Reg 550-50/CNE-C6F Inst 5820.8K/USAFE Inst 51-706 ● 26 Nov 07 APPENDIX E GUIDE FOR PREPARING ANNUAL REPORTS USING DD FORM 838 E-1.