The combination of the concrete and the conductive component serve as the grounding electrode as clarified in the definition of the term. Note that the 20 feet of conductive rods or bare wire used in creating a concrete-encased electrode only establishes the connection to the concrete. A concrete-encased electrode can also be constructed using 20 feet or more of bare copper conductor not smaller than 4 AWG.
It can be installed in one continuous 20-foot length, or, if in multiple pieces, it can be connected by the usual steel tie wires, exothermic welding, welding or other effective means to create a 20-foot or greater length. The concrete-encased electrode can be bare, zinc-galvanized, or other steel reinforcing bars or rods of not less than ½ inch in diameter coated in electrically conductive material. Section 250.52(A)(3) clearly specifies what constitutes a concrete-encased electrode. Let’s take a closer look at what constitutes a concrete-encased electrode (Ufer), when it is required, and the installation techniques. It is important to remember that, without a connection to the earth, there is no grounding. An important feature of this definition is that the electrode is in direct contact with the earth, making a connection. The NEC defines the term “grounding electrode” as “a conducting object through which a direct connection to earth is established.” The 2005 NEC first defined the term, and the definition has been subsequently revised to describe how electrodes function and to apply to conductive objects or materials that qualify as grounding electrodes. Ufer is the name of the engineer who created it as a solution to significant grounding problems discovered by the U.S. The term “Ufer” does not appear in the Code, but many in the industry use it.
#Encased meaning code
A “Ufer” ground is slang for what the National Electrical Code (NEC) addresses as a concrete-encased grounding electrode. At a recent seminar, one of the attendees asked, “What is a ‘Ufer’ ground?” This is a common question.
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