Final answer:
In Electrical Metallic Tubing (EMT), the largest percentage of the conduit's cross-sectional area that may be filled when setting up two wires and a ground is 40%.
Step-by-step explanation:
In Electrical Metallic Tubing (EMT), the largest percentage of the conduit's cross-sectional area that may be filled when setting up two wires and a ground is 40%. This means that the maximum fill percentage allowed is 40% of the total area.
This restriction is put in place to ensure that there is enough space for the wires and ground to be properly installed and to allow for thermal expansion and contraction. Exceeding this fill percentage can lead to issues with wire management, overheating, and potential safety hazards.
It's important to always follow the National Electrical Code (NEC) and any local regulations when installing electrical conduits to ensure compliance and safety.