This article is about for Voltages Specification as per NEC Article 110.4 and Conductor as per NEC Article 110.5.
NEC Article 110.4 Voltages
Voltage is a measure of the electric potential difference between two points in an electric circuit. It is the electric potential energy per unit charge, and is typically measured in volts (V). The voltage between two points in a circuit can be thought of as the “pressure” that drives the electric current through the circuit.
A higher voltage means that there is more energy available to drive the current, while a lower voltage means that there is less energy available. In general, the voltage in an electric circuit is determined by the power source, such as a battery or generator, and can be increased or decreased by using devices such as transformers or voltage regulators.
In accordance with the National Electrical Code (NEC), the voltage used for computing branch-circuit and feeder loads should be the nominal voltage as specified in Article 220. The NEC defines “nominal voltage” as the voltage at which a circuit is intended to operate, and “voltage” as the electric potential difference between two points in a circuit.
The NEC also specifies the voltage limitations for conductors in circuits rated 600 volts, nominal, or less and over 600 volts, nominal in Articles 300.2 and 300.3(C). It is important to use the correct voltage when calculating branch-circuit and feeder loads to ensure the safety and proper functioning of the electrical system.
NEC Article 110.5 Conductors
A conductor is a material that allows electrons to flow freely through it, making it an essential component of many electrical and electronic systems. Some common examples of conductors include metals such as copper, aluminum, and gold, as well as certain types of metal alloys. Conductors are used in a wide range of applications, including electrical wiring, electrical power transmission, and electronics.
They are chosen for their ability to conduct electricity because they have a high electrical conductivity, which means that they have a low resistance to the flow of electric current. This allows them to transmit electricity efficiently, with little energy loss. Non-metallic materials such as salt water and carbon can also conduct electricity, but they are generally not as effective as metals and are not used as widely in electrical and electronic systems.
According to Article 310.106(B) of the National Electrical Code (NEC), the alloy used for aluminum conductors should be in compliance with the specifications listed in the article. Aluminum conductors are commonly used in electrical systems due to their high electrical conductivity and low cost.
However, they are also prone to corrosion, which can reduce their effectiveness over time. To mitigate this, the NEC specifies the use of certain alloys for aluminum conductors to improve their performance and extend their lifespan. It is important to use the correct alloy for aluminum conductors to ensure the safety and reliability of the electrical system.
Following document is showing NEC Reference of voltage and conductors.
