A journeyman electrician is a trained professional who has completed an apprenticeship program and obtained certification through an exam. They are skilled in installing, repairing, and maintaining electrical equipment and systems. Journeyman electricians work on both residential and commercial properties and are responsible for ensuring that the electrical systems are safe and up to code. They can work independently or as part of a team, and may supervise apprentices and other electricians.

National Electrical Codes refer to a set of standards and regulations established to ensure safe electrical installations and practices. This skill encompasses knowledge of electrical design, installation, and maintenance principles that comply with these codes to prevent hazards such as electrical fires and shock. Understanding National Electrical Codes is used to guide professionals in the construction and renovation of buildings, ensuring that all electrical systems are installed correctly and safely according to established guidelines.

Relays refer to electromechanical devices that open or close circuits electromechanically or electronically. This skill involves understanding the principles of relay operation, including the control of electrical circuits through low-power signals. Knowledge of Relays is used to automate processes, control machinery, and enhance safety systems by enabling remote operation and monitoring of electrical devices.

Switchgear refers to the combination of electrical disconnect switches, fuses, or circuit breakers used to control, protect, and isolate electrical equipment. This skill encompasses the design, installation, and maintenance of switchgear systems, which are essential for ensuring the safe and reliable operation of electrical power distribution networks. Knowledge of Switchgear is utilized to manage electrical loads, protect circuits from overloads and faults, and facilitate maintenance activities by allowing safe access to equipment.

Voltage refers to the electric potential difference between two points in an electric circuit, which drives the flow of electric current. It is measured in volts and represents the force that pushes electrons through a conductor. Voltage is used to determine the energy required to move a charge between two points and is crucial in the functioning of electrical systems and devices. It is a key factor in designing and analyzing circuits, as well as ensuring proper electrical performance.