Which of the following is not true of double-insulated devices?

A. The device is made of mostly plastic, a nonconductor.
B. It is acceptable to use the device in a wet environment.
C. There is an additional layer of safety so the device does not need to be grounded.
D. The device has been designed with additional electrical safeguards.

Doubly insulated devices have nonconducting cases and built-in electrical safeguards, eliminating the need for grounding while providing safety against shock hazards.

Explanation:

Doubly insulated devices are designed with nonconducting cases, such as power tools with impact-resistant plastic cases, which provide an additional layer of safety by eliminating the need for grounding. The insulation on these devices prevents direct contact with live wires, reducing the risk of shock hazards. This design includes additional electrical safeguards to ensure user safety.

Learn more about Electrical Safety here:

https://brainly.com/question/34518143