GEC size
- Thread starter elect36
- Start date
- Status
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Re: GEC size
Look at 250.66. Multiply 4 sets by the conductor size and find the associated value for your GEC in the table.
Look at 250.66. Multiply 4 sets by the conductor size and find the associated value for your GEC in the table.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: GEC size
Section 250.66. The size of the GEC depends on the type of GE. See A, B, and C.
Section 250.66. The size of the GEC depends on the type of GE. See A, B, and C.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
Re: GEC size
Tom is correct. I left a that out of my first post. Depending on the type of electrode the GEC can be smaller than required in 250.66. The table would be used for sizing a GEC to an underground metal water pipe and the bonding jumper at the service.
Tom is correct. I left a that out of my first post. Depending on the type of electrode the GEC can be smaller than required in 250.66. The table would be used for sizing a GEC to an underground metal water pipe and the bonding jumper at the service.
- Location
- Illinois
- Occupation
- retired electrician
Re: GEC size
The maximum code required GEC is 3/0. This applies any time that you have over 1100 kcmil copper for the largest set of phase conductors. This would only apply to the GEC to the metal underground water pipe or the building steel. As others have pointed out, the code permits GECs smaller that shown in Table 250.66 for some electrodes.
Don
The maximum code required GEC is 3/0. This applies any time that you have over 1100 kcmil copper for the largest set of phase conductors. This would only apply to the GEC to the metal underground water pipe or the building steel. As others have pointed out, the code permits GECs smaller that shown in Table 250.66 for some electrodes.
Don
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