You Do Need power plug adapter while traveling from Puerto Rico to Western Sahara.

Here is Why You Need An Adapter

The outlet and plug type used in Western Sahara are C and E and in Puerto Rico are A and B. This is how they look like.

Puerto Rico

In Puerto Rico, outlets of type A and B are in use.

Type A

Type B

Western Sahara

In Western Sahara, outlets of type C and E are in use.

Type C

Type E