A/C to Household regular adapter for EV, NEMA 6-20P to 5-20R, NEMA 6-20P to 5-15R For Electrical Vehicle.
If you want to use your welder with NEMA 5-20 or 5-15 plug get power from air conditioning 3-prong 20 AMP NEMA 6-20 outlet. 
This adapter cord can help you to do it.
- 2FT adapter cord for 5-20P or 5-15P plug into NEMA 6-20 outlet for EV charger.
 - Pins and terminals are made with nickel-plated brass to prevent oxidation rust.
 - Air conditioning 20 AMP 3 prong NEMA 6-20 250V male 3-prong right angle plug.
 - Generator 3-prong 5-20 female or Household 5-15 receptacle.
 - Used SJTW 12AWG conductor inner wire with outdoor PVC jacket, support max 20 AMP loading.
 - Heavy-duty 100% copper wire conductor inside.
 - Color : Yellow cable molded with black connectors.