To determine which option specifies the maximum allowable voltage on nonpower-limited circuits according to the National Electrical Code (NEC), let's review the given options. We need to find out which voltage limit is compliant with the NEC guidelines for nonpower-limited circuits.
The options are:
- a. 200V
- b. 300V
- c. 500V
- d. 600V
By examining each choice, we determine that the correct NEC voltage limit for nonpower-limited circuits is 600V. This corresponds to option:
d. 600V
Therefore, the appropriate answer to this question is option (d) 600V.
