What wire size is required for Ufer?

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ttripolt

Member
Hello,
I am installing a 600 Amp 3 phase Main service . What wire size is required for running the Ufer. Is AWG #4 sufficient?
Thank you!
 

jumper

Senior Member
#4 CU is correct.

250.66(B) Connections to Concrete-Encased Electrodes. Where
the grounding electrode conductor is connected to a single
or multiple concrete-encased electrode(s) as permitted in
250.52(A)(3), that portion of the conductor that is the sole
connection to the grounding electrode(s) shall not be required
to be larger than 4 AWG copper wire.
 
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