Question Hello, I purchased an old never used/wired drill press. The manual only lists wiring for 220v and higher but my machine is wired for 110v. There are two black wires coming from the electric box and there is a screw which is marked for the ground. How do I determine which wire is intended for neutral and which is intended for hot?
Answer The 2 blacks from the machine would be for 220V input if thats what the nameplate says.
Connected a 220V motor to run on 120V will reduce the torque by 4. Not feasable to this unless the motor is rewound for 120V.
If you want to try it out, then connect the neutral and power lead to either of the 2 black motor leads.
Electric motor winding redesign, AC and DC. Troubleshooting, motors controls generators. Vibration analysis, dynamic balancing, root cause analysis: electrical and mechanical.
thirty five years electro-mechanical and Senior Management
Organizations EASA, CSA, ASTTBC, FSR
Education/Credentials Journeyman Motor Rewinder, Millwright, Industrial Electrician, Vibration Analyst level II. Certified Electrical Technician ASTTBC, FSR Class B, in BC. Laser alignment specialist. Marine machinery repairs. Business Management Certificate. Last 19 yrs as Plant Manager