You Do Need power plug adapter while traveling from South Africa to Lebanon.

Here is Why You Need An Adapter

The outlet and plug type used in Lebanon are C, D and G and in South Africa are C, M and N. This is how they look like.

South Africa

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

Type C

Type M

Type N

Lebanon

In Lebanon, outlets of type C, D and G are in use.

Type C

Type D

Type G