(2) Switchboards and wire lines should never be operated, set up, or taken down in an
electrical storm unless the mission requires it.
(3) It is a must to use the proper type of fuse in automatic switchboards. (For example, never
replace a standard fuse with a slow-blow fuse.)
d. Vehicles. If electrical/electronic equipment is mounted on a vehicle, two things must be
(1) Batteries should be considered--both the vehicle batteries and the batteries that are used
to operate the electrical/electronic equipment.
(a) Caution should be used to prevent arcing while batteries are being tested or handled.
Tools should be placed or stored in such a way as to not accidentally come in contact with the battery
(b) Charging batteries should be done only in a well-ventilated area and IAW local SOP.
Caution should be taken because of the possibility of acid fumes and burns
(2) Shelters should be well grounded with appropriate ground rods and ground straps. No
short cut, such as using WD-1 as a ground strap, should ever be used in grounding procedures.
Observe the following safety precautions before and during
a. Remove all jewelry (including "dog tags") when working on electrical/electronic equipment.
b. Inspect all interlock safety switches, fuses, and grounds to ensure they are in good condition
and serviceable. Interlocks, fuses, and circuit breakers should not be bypassed unless removal is essential
for performance as provided in appropriate manuals or SOP. Be extremely careful working on equipment
when the safety devices are removed and power is applied.
c. Always disconnect or connect cables by grasping end connectors.
d. When troubleshooting electrical/electronic equipment, you should not place one hand on an
energized component and the other hand on an electrical ground (for example, chassis of equipment). A
suggested method of working on such equipment is to use only one hand for probing while keeping the
other hand in your pocket or behind your back. Sometimes you must perform tests using both hands (for
example, when making voltage measurements with a multimeter). Both insulated leads should be firmly
held and placed on test points or connected to the test points by using insulated clips. Then turn the
e. Make sure that a safety board containing rescue equipment is available and in a central point
for easy access.
f. Ensure that two persons are in the immediate work area at all times while work is being
performed on exposed circuits carrying over 30 volts. This is to ensure that one person is available to
render assistance in case of accident.