What are the maximum voltages related to services in Article 230?

The correct answer identifies that the maximum voltages related to services in Article 230 encompasses 600 volts ac and 1100 volts dc. In the context of electrical services, Article 230 of the National Electrical Code (NEC) addresses the requirements for service entrance conductors and their configurations, specifically outlining the acceptable voltage levels for different types of electrical systems.

The reason 600 volts ac is significant is that it is the upper limit for most standard service installations and is widely recognized across various electrical practices. This ensures safe operation while providing flexibility for residential and commercial applications that need to handle different voltage levels under normal conditions.

The designation for 1100 volts dc also aligns with certain industrial applications which require higher direct current capabilities, fostering the use of dc systems under specific conditions. Understanding these voltage limits is crucial for adhering to safety standards, ensuring that electrical installations are not only compliant but also safe for users and equipment.

In summary, recognizing these maximum voltage levels in Article 230 is vital for electrical contractors as they design and implement service installations that meet NEC guidelines, ensuring both safety and functionality within systems.