6 December 2006
Including change 1, 7 December 2006
5-4.15.4 Live-line tools must be hung on a hand line or approved tool hanger, if
possible. Do not hang a tool on a conductor or bond wire.
5-4.15.5 Never lay live-line tools on the ground. When brought to the worksite, place
tools on portable racks or lay them on clean, dry tarpaulins or plastic sheeting.
5-4.15.6 Do not use live-line tools in rain or heavy fog except in an emergency as
directed by the authorized individual-in-charge. In no case must they be used when
conditions permit formation of rivulets of water along the tool. After completing the job,
make sure the tools are wiped dry before returning them to storage.
ELECTRICAL TESTING DEVICES. Electrical testing devices are necessary
to ensure maintenance of electric lines can be accomplished safely. This section
covers testers that are considered necessary for normal safety considerations. Always
use testing devices in accordance with the manufacturer's recommendations, and with
the appropriate personal protection. Live-line tools may also be needed.
Note: For the Air Force, proximity voltage detectors are not to be used solely to verify
deenergized conditions. Direct contact voltage meters must be used.
Electrical Testing Device Calibration.
5-5.1.1 A calibration program shall be in place which assures that all applicable
testing devices are maintained within rated accuracy. The accuracy shall be traceable
to the National Institute of Standards and Technology.
5-5.1.2 Testing device calibration frequency schedule shall not exceed 12 months.
Dated calibration labels shall be visible on all test equipment. Keep up-to-date records
that indicate dates and test results of the electrical devices calibrated.
Voltage Detectors. Voltage detectors are used to determine whether the line
or device is energized. Low-voltage detectors often use neon glow lamps or solenoid
plunger testers. High-voltage detectors are proximity and direct-contact types. The
user must understand where and how the detectors can be used. Some detectors
cannot be used to detect or measure voltages on cables with metallic sheaths or
semiconductor coatings. Some detectors cannot be used on ungrounded circuits or to
detect lower voltages.
. Use phasing testers
to determine the phase relationships
and approximate voltages on energized lines and cables. Prior to paralleling two
circuits, determine the correct connection for each conductor by checking the voltage
level between that conductor and all other conductors. The voltage across
corresponding lines or phases must be zero. A typical phasing tester consists of two
for connections. If potential transformers are available, a voltmeter can be used to