UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
4-4.3
Underground Structures such as manholes and vaults are considered
confined spaces. Refer to Paragraph 11-1.2.
4-4.4
Arc flash rated clothing must be properly worn. Long sleeves must be rolled
down and buttoned. Garments with exposed metallic fasteners must not be worn,
unless the garments are properly arc rated.
4-4.5
Garments, including safety harnesses, worn over arc flash rated protective
clothing must be arc flash rated.
4-4.6
For the Air Force, at forward deployed locations, Mission Oriented Protective
Postures equipment may directly conflict with PPE/clothing requirements for performing
electrical work on or near energized circuits. For this and other contingency or wartime
operations when special chemical, biological, or radiological clothing is required, the
Base Civil Engineer may waive or modify requirements in this chapter, but only after
evaluating all safety alternatives with mission requirements.
4-5
AIR FORCE ARC FLASH PPE REQUIREMENTS FOR HIGH-VOLTAGE
OVERHEAD LINE WORK AT 69 KV (NOMINAL) OR LESS.
WARNING
Working on energized electrical equipment is prohibited except in rare
circumstances, and then only when justified and approved by the BCE or
equivalent in accordance with AFI 32-1064.
4-5.1
Background.
The minimum arc flash PPE noted in the following paragraphs shall be worn for the
following activities:
During the process of de-energizing circuits.
During the process of re-energizing circuits.
During those rare occasions when the authority in Air Force Instruction
(AFI) 32-1064, Electrical Safe Practices, authorizes work on energized
electrical equipment or lines.
Note: A documented flash hazard analysis can be a basis to modify the arc flash PPE
requirements contained in the following paragraphs. Documentation shall include
posting the energized work permit and correct PPE at the jobsite. Conducting a hazard
analysis is the highly preferred approach for selecting PPE.
The hot stick working distance specified in the following paragraphs is the distance
between an exposed fixed circuit part and the closest part of the worker.
4-15
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