From the field:

Quote
I have a question regarding electrical grounding clamps and there use.

Question: Can you use an aluminum grounding clamp on a bronze, brass, or copper grounding rod?

References in the 1999 NEC Article section 250-8, 250-10, and 250-70 covers grounding clamps and stipulates exothermic welding, listed clamps, pressure connectors, listed lugs, or other listed means. Also it states that grounding clamps shall be listed for the material of the grounding electrode.

Please provide me with your interpretation of the NEC code for the use of aluminum clamps use.

Thank you,

Robert

Joe Tedesco, NEC Consultant