UFC 4-211-02N
10 January 2005
Including change 1, 25 May 2005
Provide the maintenance hangar with flush mounted, floor power
ground receptacles, each with a 19 mm (3/4-inch) diameter ground rod,
located at a minimum of 7.3 m (24 foot) centers across the centerline of
the OH space. Locate additional power ground receptacles around
dedicated aircraft parking areas to facilitate the use of grounding
connections. When aircraft are parked outside of the hangar, provide
static ground receptacles on parking aprons. Resistance to ground for
ground power must not exceed 10 ohms maximum, and for static ground,
must not exceed 10,000 ohms in accordance with MIL-HDBK-274 (AS),
Electrical Grounding for Aircraft Safety and with NAVSEA OP5,
Ammunition and Explosives Ashore Safety Regulations for Handling,
Storing, Production, Renovation and Shipping. Connect ground
receptacles together with No. 1/0 AWG minimum bare copper below the
hangar floor and connected to the facility grounding system. See Figure
7-1 for typical power grounding details. /1/
1-2
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