Final answer:
The statement is false. An unevaluated device cannot be used in a class 2 or low voltage limited energy circuit according to UL 508A standard.
Therefore, the correct answer is: option 'false'.
Step-by-step explanation:
Class 2 circuits are defined as circuits where the voltage does not exceed 30V rms (42.4V peak) and the current is limited to 100VA.
And an unevaluated device, with the exception of a field terminal, cannot be used in a class 2 or low voltage limited energy circuit according to UL 508A standard. Therefore, the statement is false.
These circuits have strict requirements for safety and operation, and any device intended to be used in such circuits must undergo evaluation and certification to ensure compliance with the necessary standards.
Insulating material is generally not used on these wires because it would not withstand the high voltage and environmental conditions, and also because it is unnecessary for overhead power lines where physical contact is not a concern.