Mike Dolt Enterprises
Mike Dolt Enterprises
User: charlie b, Location: Lockport, IL
Asked on: Tuesday, March 15, 2011 at 12:24 pm EDT
Answered on: Tuesday, May 14, 2024 at 2:49 am EDT
Question: If I have a light switch installed in a metal "outlet box," with let us say three wires that allow it to perform its "lights-on, lights-off" function, do I also need to bring an EGC (or would it be called something else) to the location, to attach to the metal box? If so, where is the other end of that wire landed? Perhaps to the EGC that serves the nearest light fixture that is controlled by the switch?Reason for question: I am reviewing a lighting design layout. They are using "tick marks" [I hate those] to show numbers and types of conductors. They show three ungrounded conductors to the switch, but no ground wire. I am not certain that one is needed, but I should think it would be needed.
Yes, an Equipment Grounding Conductor (EGC) is required for the switch box, even if it is a metal box. The metal box provides a path to ground for the switch and any other electrical devices connected to it.The other end of the EGC should be connected to the grounding system of the building. This is typically done by connecting it to a grounding electrode conductor (GEC), which is a bare copper wire that is connected to a grounding electrode, such as a water pipe or ground rod.In your case, the EGC could be connected to the EGC that serves the nearest light fixture that is controlled by the switch. However, it is important to note that the EGC must be continuous throughout the entire electrical system. This means that it must be connected to all metal boxes, electrical devices, and other equipment that requires grounding.The NEC (National Electrical Code) requires that all electrical boxes be grounded. This includes metal boxes. The EGC provides a path for fault current to flow to ground, which helps to protect people and property from electrical shock and fire. Flag for review