ARMY TM 9-6115604-12
NAVY NAVFAC P-8-633-12
After the lines or equipment have been proven to be deenergized, temporary grounds must be installed on first
pole on each side of the location of the work. When installing temporary grounds, make ground connection first.
Before making connection to line, test for static discharge with a switch stick as an added precaution. When
removing temporary grounds, disconnect ground connection last.
All lines or equipment (energized at 600 to 5,000 volts between conductors) within reach of technicians or which
must be climbed through must be covered with rubber line hose, insulator hoods, blankets, or isolated with
suitable barriers. A technician that changes position, before starting the new work, must cover or barricade any
energized or grounded conductor or equipment coming within reach.
Before working near energized equipment at the substation, shut it off properly and install suitable barriers and
Before cable is cut or an opening is made in the lead sheath or sleeve, be sure cable is identified by supervisor
by checking duct location with that shown on working print. The working print must be checked against the facility
engineer's map records. In addition, check identity by listening on cable with exploring coil for pulsating beat of
After cable has been identified and grounded, remove a 3 inch (76 mm) strip of lead around cable and test with
two voltage detectors, one at a time, at two or more points around cable at center of exposed insulation.
When cutting cable, place hacksaw on the exposed cable insulation adjacent to and touching the grounded lead
sheath or temporary ground on sheath before cutting.
High Voltage (Over 5,000 Volts).
Observe precautions of step b(1), above.
Apply temporary grounds as outlined in step b(2), above.
Observe precautions of step b(3), above.
Maintain minimum body clearance from energized lines and equipment in accordance with Table 1-4.
Observe precautions of step b(4), above.
Do not touch or approach reactors and connected equipment unless proved to be deenergized and
Discharge electrolytic and oxide film lightning arresters by grounding and shorting the horn gaps.