Sizing
How many amps does a mixed shop with a car parked need in a garage
The mixed shop with a car parked package that fits a 22 x 22 ft garage needs 5 circuits (0 at 240V), about 22 A of demand on a 240V-equivalent basis, and a 60 A subpanel to ask your electrician about.
The circuit list
| Circuit | Volts | Breaker | Wire | Receptacle |
|---|---|---|---|---|
| Jobsite table saw on a stand | 120 V | 20 A | 12 AWG | NEMA 5-20R |
| 14 in bandsaw | 120 V | 20 A | 12 AWG | NEMA 5-20R |
| Tool bench (Planer, Drill press) | 120 V | 20 A | 12 AWG | NEMA 5-20R |
| Shop vac with cyclone separator | 120 V | 20 A | 12 AWG | NEMA 5-20R |
| Shared bench circuit 1 | 120 V | 20 A | 12 AWG | NEMA 5-20R (several) |
240V machines each get a dedicated circuit sized at 125 percent of their running amps; 120V machines at 10 A or more get their own 20 A circuit; small loads share bench circuits. Wire is copper on the NM-B ampacity column (NEC Table 310.16, 60 C). These are planning sizes: a licensed electrician confirms every one.
Why that subpanel
Connected load adds to 29 A in 240V-equivalent terms, but a shop rarely runs everything at once: counting the largest load in full and the rest at a diversity factor gives about 22 A, and with the 125 percent rule a 60 A subpanel. The package is: Jobsite saw, Bandsaw, Tool bench, Vac + separator, 4 ft bench, Shelving. Machines on mobile bases so the car still sleeps inside.
Use the workshop amps calculator to change the machines, and open the 22 x 22 mixed shop with a car parked layout to see where each one sits.
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Unsubscribe anytime. You can also just read the checklist on this site.Subpanel by trade: the other answers
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Frequently asked questions
Do I need 240V for a mixed shop with a car parked?
Not for the machines in this package: they all run on 120V. Heaters, large compressors, collectors over 2 HP and most welders are happier on 240V; the 240V circuit calculator sizes each.
This page is researched guidance, not professional electrical, engineering or safety advice. Circuits, loads and clearances depend on your house, your service and your town: have a licensed electrician confirm any wiring, and check local code and each manufacturer's manual before you act.
