A conducting object through which a direct connection to earth is established; NEC 250.52 lists acceptable electrodes including metal underground water pipe, concrete-encased electrodes (Ufer grounds), ground rings, and ground rods.
In development The full guide is being written ahead of Loomi's launch. Drop your email on the homepage to be notified when it's live.
Loomi turns these calcs into 12,900+ timed, NEC-referenced exam questions, with spaced repetition that hammers your weak spots. Try everything free for 3 days at launch.
Get launch access