| Cruise line | Published position | Practical takeaway |
|---|---|---|
| Royal Caribbean | Lists extension cords, power strips and multi-plug outlets as prohibited | Bring compliant device chargers, not a strip |
| Carnival | Allows certain power strips, adapters and extension cords without surge protectors when used with caution | Surge protection remains the key exclusion; security has final discretion |
| Princess | Its FAQ describes inspection/testing conditions for certain multi-plug and extension devices | Do not assume automatic approval; verify the latest wording |
Why surge protectors are treated differently
Shipboard electrical systems are not the same as household wiring. Cruise lines write their policies around fire and electrical safety. Travelers do not need to judge the circuitry themselves: the safe approach is to follow the current line-specific list.
What to use instead
Start with the cabin’s installed outlets and USB ports. Bring a compact, certified USB charger that matches the line’s published rules, and charge devices in rotation. A portable battery can reduce outlet competition, but airline rules govern where and how lithium batteries travel.
Medical equipment is a separate conversation
If you need electrical equipment for a medical or accessibility reason, contact the cruise line’s accessibility team before sailing. Do not solve the requirement by bringing an unapproved extension cord. The line may arrange compliant equipment or provide ship-specific instructions.
If security holds the item
Follow crew instructions and ask how it will be documented and returned. Do not hide the device or argue from a product listing. Keep essential charging cables separate so the rest of your setup remains usable.
Official sources
- Royal Caribbean prohibited-items policy — power strips, extension cords and multi-plug outlets prohibited
- Carnival prohibited items and exemptions — non-surge devices may be allowed with caution
- Princess pre-cruise FAQ — published inspection-based electrical-device rules