Low Voltage between Neutral and Ground wires in Dishwasher Junction Box
Yes, because of voltage drop

If you've ever done a voltage drop calculation, let's say you want to run a 12A well pump load.  You do the calculations and it says you'll have 6 volts of voltage drop, so 114V.  OK.  

Well, how does that happen?  There are TWO wires - hot and neutral.  Is the voltage drop shared across both?  Yes.  Each one drops 3 volts.  

Well, how does "dropping" voltage on a neutral work?  Certainly the hot sags to 117V, no question there.  Obviously if the neutral sags to -3 volts, there'd still be 120 across hot and neutral, so that can't be it.   Actually, the neutral "drops" the other direction - it rises to +3 volts. So with neutral at 3V, and hot at 117, you have the expected 114V.  

Why doesn't ground move also?  Voltage drop is proportional to current; that's literally what Ohm's Law is saying. E=IR.  Since there is no current on ground, it doesn't drop.  

So you measure 3V between neutral and ground in that case. 

It's rather like the small rod on a beam-type torque wrench.  Your strength is bending the big rod, but the small rod is unaffected and indicates your torque on the scale.