Don’t require power plug adapter while traveling from Pitcairn Islands to Vanuatu.

Here's why you do not need an adapter

The outlet and plug type used in Vanuatu is I and in Pitcairn Islands is I and they are compatible with each other.

Pitcairn Islands

In Pitcairn Islands, outlets of type I are in use.

Type I

Vanuatu

In Vanuatu, outlets of type I are in use.

Type I