One of my local inspectors indicated that I will need to surround my most recent ground mount with a fence to meet NEC 2014 code. Is this so?

Comments

Unfortunately the NEC is a bit open to interpretation on this one and your customer will likely need to install some sort of "guarding" if the inspector enforces it. 

690.31(A) "where pv source and output circuits operating at max system voltages greater than 30v are installed in readily accessible locations, circuit conductors shall be guarded or installed in a raceway"

In the end you will need to meet the requirements set forth by your local inspector/AHJ.