You Do Need power plug adapter while traveling from Turks and Caicos Islands to Nepal.

Here is Why You Need An Adapter

The outlet and plug type used in Nepal are C, D and M and in Turks and Caicos Islands are A and B. This is how they look like.

Turks and Caicos Islands

In Turks and Caicos Islands, outlets of type A and B are in use.

Type A

Type B

Nepal

In Nepal, outlets of type C, D and M are in use.

Type C

Type D

Type M