The minimum size GEC to a concrete-encased electrode is ___ AWG.

The minimum size ground electrode conductor (GEC) required for a concrete-encased electrode, which is also known as a Ufer ground, is typically specified as 4 AWG copper or 2 AWG aluminum. In this context, selecting 4 AWG ensures compliance with the National Electrical Code standards, which aim to provide adequate grounding and bonding for electrical systems.

The rationale behind having a minimum conductor size for grounding systems is to ensure that the system can safely carry any fault current that may occur and to facilitate the effective dissipation of electrical energy into the ground. A larger conductor size limits the potential for excessive heating and ensures better conductivity, reducing the risk of ground faults or electrical hazards.

Concrete-encased electrodes have particular characteristics that necessitate strict adherence to the NEC requirements, making the choice of the GEC size critically important to overall system safety and effectiveness.