Cisco Aironet 1400 Series Manual page 33

Warning
Never defeat the ground conductor or operate the equipment
in the absence of a suitably installed ground conductor.
Contact the appropriate electrical inspection authority or an
electrician if you are uncertain that suitable grounding is
available.
Warning
Do not work on the system or connect or disconnect cables
during periods of lightning activity.
Warning
Do not operate your wireless network device near unshielded
blasting caps or in an explosive environment unless the
device has been modified to be especially qualified for such
use.
Warning
Industry standards relating to radio frequency (RF) exposure
limits for this product require that the antennas should be
positioned no less than 6.6 ft. (2 m) from your body or nearby
persons.
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