You Do Need power plug adapter while traveling from Isle of Man to Chad.

Here is Why You Need An Adapter

The outlet and plug type used in Chad are C, D, E and F and in Isle of Man are C and G. This is how they look like.

Isle of Man

In Isle of Man, outlets of type C and G are in use.

Type C

Type G

Chad

In Chad, outlets of type C, D, E and F are in use.

Type C

Type D

Type E

Type F