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

Here is Why You Need An Adapter

The outlet and plug type used in Thailand are A, B, C and O and in New Caledonia are C and F. This is how they look like.

New Caledonia

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

Type C

Type F

Thailand

In Thailand, outlets of type A, B, C and O are in use.

Type A

Type B

Type C

Type O