Grounding Electrode Conductor Size

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The National Electric Code (NEC) defines the Grounding Electrode Conductor as the conductor used to connect the system ground conductor or the equipment to the ground-electrode or to a point in the grounding electrode system.

The Grounding Electrode Conductor is discussed in Article 250 and the sizing of the conductor in 250.66. The calculation is based on Table 250.66 which defines the minimum size electrode conductor of alternating-current systems.

The National Electric Code (NEC) specifies the minimum size for cable tray systems which includes ladder, ventilated trough, ventilated channel, solid bottom and other similar structures. It’s important to note that cable trays are mechanical support systems and not raceways. Raceways are included in another section of the code.

Proper cable tray sizing is complicated and often existing cable trays are overloaded per the code. If you have questions or would like some engineering assistance to properly size your cable tray installation please contact us.

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