Paul,in addition to checking overall installation and compliance to other ares of the code, most inspectors will check polarity with a receptacle analizer, check grounding with an ohmmeter, and require Fire alarm certification at the final inspection.
Most insulation and ground test are specified in the engineers specifications, although I have had inspectors who requested ground readings at the GEC. (ground megger)
The kicker to this is, per the NEC, if you can not achieve a value of 25 ohms or less on a ground rod you must add a second rod and that is all that is required whether this gets the 25 ohm minimum or not.
In medical installations certifications of equalpotential grounding, Isolation systems commissioning, Fire alarm certification, Generator commissionig, Critical, and Life safety branches to name a few are required.
This in the areas I work, some others may have other standards.
Roger
