Toshiba NB520 User Manual page 112

For the United States and Canada, two pin plug configuration must be a
2-15P (250V) or 1-15P (125V) and three pin plug configuration must be
6-15P (250V) or 5-15P (125V) as designated in the U.S. National Electrical
code handbook and the Canadian Electrical Code Part II.
The following illustrations show the plug shapes for the U.S.A. and
Canada, the United Kingdom, Australia, Europe and China.
User's Manual
USA
UL approved
Australia
AS approved
Canada
CSA approved
NB500/NB520/NB550D
United Kingdom
BS approved
Europe
Approved by the appropriate
agency
China
CCC approved
B-2