HP Compaq CV5500 Reference Manual page 50

Agency Regulatory Notices
If you need to obtain a power cord for a different country, you
should purchase a power cord that is approved for use in that
country.
The power cord must be rated for the product and for the voltage
and current marked on the product's electrical ratings label. The
voltage and current rating of the cord should be greater than the
voltage and current rating marked on the product. In addition, the
cross-sectional area of the wire must be a minimum of 0.75 mm²
or 18AWG, and the length of the cord must be between 6 feet
(1.8 m) and 12 feet (3.6 m). If you have questions about the type
of power cord to use, contact your HP authorized service
provider.
A power cord should be routed so that it is not likely to be walked
on or pinched by items placed upon it or against it. Particular
attention should be paid to the plug, electrical outlet, and the
point where the cord exits from the product.
Reference Guide C–5