Each stateroom has one electric outlet located at the desk. The outlet is equipped with a 3-prong 110 volt (North America Grounded) and a 220 volt (Europe German-Style). On the Mardi Gras, there are three outlets located at the desk.
On the Carnival Horizon, Carnival Panorama, Carnival Sunrise, and Carnival Vista, there is one USB outlet (5 volt, 1000mA) in each stateroom. On the Mardi Gras, there are multiple USB outlets at the desk and next to the beds.
The outlet in the bathroom can only be used for electric razors.
Power strips, multi plug box outlets/adaptors and extension cords (without surge protectors) are allowed on board when used with proper caution. However, if such devices are determined to pose a hazard, they will be removed and returned the last day of the cruise prior to debark.
On Australia itineraries, the staterooms on the Carnival Spirit and Carnival Splendor are fitted with a standard Australian 3-point plug or adaptor providing 220/240 volt 60Hz. Adapters are available for purchase if needed.