NEC BladeServer Express5800 Series User Manual page 19

Notes on Using Your Server 1-5
CAUTION
Avoid installation in extreme temperature conditions.
Immediately after the server is powered off, its internal components such as
hard disk drives are very hot. Leave the server until its internal components
fully cool down before installing/removing any component.
Avoid contact with the server during thunderstorms.
Disconnect the power plug from the outlet when a thunderstorm is
approaching. If it starts thundering before you disconnect the power plug, do
not touch any part of the server including the cables. Failure to follow this
warning may cause a fire or an electric shock.
Keep animals away from the server.
Animal waste or hair may enter the CPU blade and cause a fire or electric
shock.