The Ground Wire (Conductor) Size Calculator will determine the appropriate size of ground conductor needed for grounding pathways & equipment based on the ampere rating of the equipment or the setting of any automated overcurrent protection devices that are in the circuit before the equipment.

This is in accordance with Table 250.122 of the NEC, which is the National Electrical Code.

This simple calculator can only do calculations with copper conductor and aluminium conductor. Others are excluded. 

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