What color wire is typically used for ground in 120/240V AC systems in the U.S.?

In 120/240V AC systems in the U.S., ground wires are traditionally identified by their green insulation or are left bare. This color-coding is established to ensure safety and standardization in electrical installations. Ground wires provide a path for fault currents to safely dissipate into the ground, which helps to prevent electric shock and equipment damage. The use of green or bare wires specifically indicates that they are not intended to carry current under normal operating conditions; their sole purpose is to protect and enhance the safety of the electrical system. Identifying the ground wire correctly is crucial for electricians to maintain compliance with the National Electrical Code (NEC) and to ensure safe electrical practices.