Nec Service Ground Wire Size Chart

For application of this section the main. The question is about the appropriate sizing of these bars rods and wires. Ground wire size table source.
nec service ground wire size chart

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A wire runs from this bar to a long copper rod which is physically pounded into the dirt aka ground.

Nec service ground wire size chart. Table 25066 is used for system grounding size and 250122 is used for equipment grounding. The ground conductor size calculator will calculate the proper ground conductor size for grounding raceways and equipment based on ampere rating or setting of automatic overcurrent protection device in circuit ahead of equipment. The type of wire to use in most instances is service entrance cable sec. This video shows what size wire to buy when installing or upgrading an electric service panel.

For example a typical 60a residential panel in the us requires a 10 gauge wire and a 100a panel requires an 8 gauge per the us national electrical code. I have had conflicting answers depending on whether it came from an ahj or an electrical engineer. Size it per table 25066 based on the area of the largest ungrounded service conductors within the raceway 250102c. 120240 volt 3 wire single phase service entrance conductors service lateral conductors and feeder conductors that serve as the main power feeder to a dwelling unit and are installed in raceway or cable with or without an equipment grounding conductor.

National electrical code nec 2014 edition table 250122. Which of these charts is used for grounding sub panels or any panel downstream from the main not from. Nfpa 70 national electrical code table 250 95 rating or setting of automatic overcurrent device in circuit ahead of equipment conduit etc. When a metal raceway containing service conductors terminates to an enclosure without a ringed knockout you can use a bonding type locknut.

This is based on nec nfpa 70.