You Do Need power plug adapter while traveling from Cayman Islands to Christmas Island.

Here is Why You Need An Adapter

The outlet and plug type used in Christmas Island is I and in Cayman Islands are A and B. This is how they look like.

In Cayman Islands, outlets of type A and B are in use.

Type A

Type B

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

Type I

I am from

going to