Apple PowerBook (3400 series) - Manual (Page 11)

When you are ready to begin, follow these steps:
1 Plug one end of the power cord into the power adapter and the other end into a three-
hole grounded outlet or power strip.
2 Plug the power adapter plug into the power adapter port (marked with the icon
¯
) on the
back panel of the computer.
Power cord
Power adapter
Power adapter plug
¯
Power adapter port
WARNING This equipment is intended to be electrically grounded. The
power adapter that came with your Macintosh PowerBook is equipped
with a three-wire grounding plug—a plug that has a third (grounding)
pin. This plug will fit only a grounded AC outlet. This is a safety
feature. If you are unable to insert the plug into the outlet, contact a
licensed electrician to replace the outlet with a properly grounded
outlet. Do not defeat the purpose of the grounding plug!
11 Getting Started