110V Line to Earth Ground

Good day mr. anonymous. First I would like to know how did you make your grounding system? Did you use a standard grounding rod (1/2"D X 3m)? If not you cannot solve your problem. Try to use a standard grounding rod, please let me know.

You mentioned that your system voltage is 220V single phase line-to-line. To get a 110V take one hot line plus neutral. The grounding system is separate from neutral. Some urban ereas the utility power company provides 220V Line-to-neutral/ or 220V line-to-line plus neutral or simply 220V single phase 3-wire system. Minimum size of ground rod is 1/2 inch x 3m length directly driven into the earth/ground encase with inspection pit. Wrong is you can't pair hot line and ground line , right is you can pair one hot line to neutral line. Neutral line or wire is always insulated from any electrical equipment metal frame/s while ground wire is always bonded to any metal frame or panel board because it is a current continuity path when the load is energized. The correct connection of motor for 220V(line-line plus ground); for 110V(line-neutral plus ground), in short both 110V and 220V single phase rated motor are 3-wire system.

Thank you for your comment hentoyk, You are right, you cannot pair one hot line to the ground for a 220V line to line plus neutral system as what they did. So what is your recommendation for the problem to run the 2HP motor from the existing distribution system?

The ground/earth conductor is there to operate the circuit protective device(s) in the event of a fault.

The correct connection is to live and to neutral. Current flowing ordinarily in the ground/earth conductor will eventually cause someone an electric shock.

I agree with you, however it was not clear in the problem if the existing line to line 220V system is a 3wire. If this is the situation what is your recommendation?

Anonymous Poster #1 would do best to engage the services of a qualified local Electrician before someone gets hurt/killed.

I was going to as earlier, but I didn't--where are you? In the US, it is quite common to have what is known with variations of names like: "3 wire system", "120-0-120 system", or whatever. If you connect between the two lines you get 220-240 volts, if you connect line to the center wire (neutral), you get 110-120 volts.

If you are in some other country (or even some places in the US), you might not have that kind of system, and will have more difficulty getting 110 volts. If you're improvising by connecting between ground and one of the lines, you're creating a dangerous and unreliable system.

So, where are you, and what do you know about your power system?