You Do Need power plug adapter while traveling from Sierra Leone to North Macedonia.

Here is Why You Need An Adapter

The outlet and plug type used in North Macedonia are C and F and in Sierra Leone are D and G. This is how they look like.

Sierra Leone

In Sierra Leone, outlets of type D and G are in use.

Type D

Type G

North Macedonia

In North Macedonia, outlets of type C and F are in use.

Type C

Type F