EXFO FTB-500 (Window XP) - Manual (Page 26)

Safety Information
16 FTB-500
Electrical Safety Information
Electrical Safety Information
The four-slot model uses an external AC/DC adapter connected to an
international safety standard three-wire power cable.
The eight-slot model uses an international safety standard three-wire
power cable. This cable serves as a ground when connected to an
appropriate AC power outlet.
Note: If you need to ensure that the unit is completely turned off, disconnect the
power cable and remove the batteries.
W
ARNING

Insert the power cable plug into a power outlet with a
protective ground contact. Do not use an extension cord
without a protective conductor.

Before turning on the unit, connect all grounding terminals,
extension cords and devices to a protective ground via a ground
socket. Any interruption of the protective grounding is a
potential shock hazard and may cause personal injury.
Whenever the ground protection is impaired, do not use the
unit and secure it against any accidental operation.

Do not tamper with the protective ground terminal.