You Do Need power plug adapter while traveling from United States Virgin Islands to Norfolk Island.

Here is Why You Need An Adapter

The outlet and plug type used in Norfolk Island is I and in United States Virgin Islands are A and B. This is how they look like.

In United States Virgin Islands, outlets of type A and B are in use.

Type A

Type B

In Norfolk Island, outlets of type I are in use.

Type I

I am from

going to