I finished a needed shop electrical upgrade. I was running everything off of a single 15 amp circuit that was shared with a weird assortment of outlets/lights in the house. Not only did the breaker trip, but tools seemed underpowered. The bandsaw labored and would make the lights flicker while the table saw seemed to take a bit to get up to speed and recover under load. To make the dust collector go, I brought in a 12-3 extension cord for more power.
I had an electrician bring in a 20-amp, 240-volt subpanel to the garage and workshop. I then wired a 20 amp circuit dedicated to machines and hand tools. Then I ran a second 20 amp circuit for the dust collector and exhaust fan. For the machines and tools, I wired four outlets around the shop and no longer need any extension cords. For lights, I’ll just keep them on the existing circuit.
I also had the electrician add a couple 20 amp 240 outlets. On one outlet I installed a 4000-watt heater. I hope to eventually put an 8-inch jointer on the other outlet.
With the upgrade, I can now run my dust collector, heater, and any machine at once with plenty of amps to spare. I don’t have enough power to run a 15 amp 240 machine like an 8-inch jointer with the heater and dust collector, but I can handle turning off the heater to use the jointer.
So, I now have enough power to run the shop, 240v electric for a jointer upgrade, better shop heat, and better organization with no more extension cords and plug/unplug stuff.