UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
6-2.1
Low-Voltage Levels (600 Volts and Below). Maintain the minimum
approach and working distances given in Table 3-1 until the lines and equipment are
positively proven to be deenergized and wear appropriate personal protective
equipment. Safe Clearance procedures apply to low-voltage levels. Lines and
equipment must be positively proven to be deenergized before work is begun. A locally
approved voltage detector may be used for this test in conjunction with a direct contact
voltmeter. The detector must be checked on a conductor known to be energized both
before and after checking the deenergized line or equipment. All energized
conductors or equipment within reach of workers must be covered with insulating
material or approved rubber protective equipment. Temporary grounding must be
installed on lines and equipment to be worked on, unless the authorized individual-in-
charge determines that temporary grounding is not practical. The authorized individual-
in-charge must explain to the work crew the reasons for not installing temporary
grounding. When pulling in new conductors near energized conductors, the new
conductors must be provided with temporary grounds, and treated as if energized until
the work is complete. Always treat bare wire communication conductors and neutrals
on power poles as energized lines and use appropriate personal protective equipment.
6.2.2
High-Voltage Levels (>600 Volts to 69,000 Volts).
Note: Any voltage above 600 volts is referred to as high voltage in this UFC. Refer to
the Glossary for definitions.
6-2.2.1 Maintain the minimum approach and working distances given in Table 3-1
until the lines and equipment are positively proven to be deenergized and wear
appropriate personal protective equipment. Use a locally approved voltage detector for
this purpose. Check the detector on a conductor known to be energized both before
and after checking the deenergized line or equipment. If an energized conductor is not
available for the check, the detector may be checked on a spark plug of a running
gasoline-powered engine. Commercially available spark testing devices can also be
used
6-2.2.2 After the lines or equipment have been proven deenergized, install a cluster
mount ground on the pole the worker is working. When installing temporary grounds,
make the earth connection first and then connect to the conductor or equipment. Use a
hot stick when making the connection to the conductor due to the hazard of static
discharge. When removing temporary grounds disconnect the earth connection last.
Refer to Chapter 7 paragraph entitled "Temporary Grounding of Aerial Lines", for
additional grounding information.
6-2.2.3 All high-voltage electric lines and equipment within reach of workers, or which
must be climbed through or worked next to, must be covered with rubber line hose,
insulator hoods, or blankets, or isolated with suitable barriers. A worker who changes
position must, before starting the new work, cover or barricade any energized or
grounded conductor or equipment coming within reach.
6-6
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