You Do Need power plug adapter while traveling from Mozambique to New Caledonia.

Here is Why You Need An Adapter

The outlet and plug type used in New Caledonia are C and F and in Mozambique are C, F and M. This is how they look like.

Mozambique

In Mozambique, outlets of type C, F and M are in use.

Type C

Type F

Type M

New Caledonia

In New Caledonia, outlets of type C and F are in use.

Type C

Type F