The majority of faults begin as a phase-to-ground event. Systems that use a grounding impedance such as a neutral grounding resister can greatly reduce the ground fault current to a very low value. These currents are typically 5 to 10 amps for high impedance grounding at lower voltages and a few hundred amps with low impedance grounding at higher voltages. Reducing the current to such low levels can prevent a single phase arc flash from escalating into a three phase arc flash.

Here is this week's question:

Does your facility (or clients) use impedance grounding?
No
It Depends - We have a mix of sites/clients
Yes - our site uses impedance grounding
Doesn't apply