Grounding Plate Electrode Requirements

A buried iron or steel plate used as a grounding electrode shall expose not less than _____ of surface area to exterior soil.

a) 1 sq ft
b) 2 sq ft
c) 4 sq ft
d) 6 sq ft

See answer and applicable Code reference

The correct answer is: b) 2 sq ft

Grounding electrode requirements are outlined in Sec. 250.52 of the 2011 NEC. As noted in 250. 52(A)(7), "Each plate electrode shall expose not less than 2 sq ft of surface to exterior soil. El

Register to view the full article

Register on EC&M and gain access to premium content, including this article and much more.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.