Apple Power Macintosh 9500 Series - Manual (Page 13)

3 Getting Started
Plugging in the computer
Before you plug your Macintosh into a wall socket, carefully read all the
setup instructions in this chapter. Then, before you connect anything to your
Macintosh, follow the instructions in this section to plug it in. The plug
grounds the computer and protects it from electrical damage while you are
setting up. When you are ready to begin, follow these steps:
1 Plug the socket end of the computer’s power cord into the recessed power socket
(marked with the symbol ≤ ) on the back of the computer.
2 Plug the other end of the power cord into a three-hole grounded outlet or power strip.
Power cord plug
Power cord socket
WARNING This equipment is intended to be electrically grounded.
Your Macintosh 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!