You Do Need power plug adapter while traveling from Antigua and Barbuda to South Africa.

Here is Why You Need An Adapter

The outlet and plug type used in South Africa are C, M and N and in Antigua and Barbuda are A and B. This is how they look like.

Antigua and Barbuda

In Antigua and Barbuda, outlets of type A and B are in use.

Type A

Type B

South Africa

In South Africa, outlets of type C, M and N are in use.

Type C

Type M

Type N