When upsizing circuits to compensate for voltage drop the egc size needs to be considered as per 250.122 (B). Is there a quicker means of determining an appropriate ground size than applying the formula and checking the tables ? Rule of thumb, does going to the next size down in conductor size cover the EGC sizing requirement?
EGC sizing
- Thread starter schole
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- Chapel Hill, NC
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If the original size of the conductor was either 14, 12, or 10 gauge then the ratio is one to one. Thus a #14, 12 or 10 wire gets upsized to #6 then the egc must also be #6. There is no rule of thumb for the other but it only takes a minute to figure it out. Do you need help with that?
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