Conduit Size for grounding electrode conductor

[Nader Alfeki]

In case the grounding electrode conductor will be installed in embedded conduit, is there any limitation on the filling ratio of the conduit?
knowing that the conductor within the conduit will be drawn and installed before casting concrete.

 

[Smart $]

Not greater than 53% for one conductor. Chapter 9 Table 1.

However, Notes to Tables (2) states "Table 1 applies only to complete conduit or tubing systems and is not intended to apply to sections of conduit or tubing used to protect exposed wiring from physical damage." Most conduits for GEC's are not complete runs, i.e. they do not terminate to an enclosure at both ends. Such a run is not required to comply with the 53% maximum fill.

 

[petersonra]

Is there any reason a GEC cannot be embedded in the concrete directly?

 

[Carultch]

Is there any reason a GEC cannot be embedded in the concrete directly?

It can, but it may be a design decision not to do so. One reason is if the equipment is outdoors, and you want to hide any copper to deter theft.