Purchase an adaptor for your appliance. The adapter for a non-grounded plug will have holes for the two flat prongs on the plug and two rounded prongs on the other side to insert into the type of wall outlet used in Peru. The adapter for a grounded plug has three prong holes on one side and three rounded prongs on the other.
Insert the prongs of your dual-current appliance into the adaptor.
Insert the round prongs of the adaptor into the Peruvian wall outlet.
Determine the wattage requirement of your non-dual voltage appliance. This information should be on a label attached to the appliance or embossed somewhere on the case.
Purchase a transformer, for a non-heating appliance such as a battery charger, that meets the wattage requirements of your appliance.
Purchase a transformer for your heating appliance, such as a hair dryer or coffeemaker, which meets the wattage requirements of your appliance if you will be using it for more than 30 minutes at a time. If you will be using it for less than 30 minutes at a time, use a converter specifically made for heating appliances.
Purchase an adaptor, for non-grounded plugs, that will allow the two flat prongs of your appliance to go in on one side with the other side having rounded prongs to go into the style of outlet that you will find in Peru.
Plug the appliance into the transformer. Plug the transformer into the adaptor. Plug the adaptor into the Peruvian wall outlet.
