3. Which of the following statements about the use of structural steel as an equipment grounding conductor (EGC) in an AC system is correct? A. Structural steel isn't allowed for use as an EGC. B....

3. Which of the following statements about the use of structural steel as an equipment grounding conductor
(EGC) in an AC system is correct?
A. Structural steel isn't allowed for use as an EGC.
B. Structural steel can be used as an EGC bonding jumper between panelboards.
C. Structural steel must have an EGC bonding jumper every three feet of structure.
D. Structural steel can be used as an EGC when it's bonded at both ends.