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I am building my own workshop and I am currently installing the electrical. I am interested in suggestions on how to wire in a 240 Volt circuit.
My shop has several 120V 20A general purpose circuits. I am adding a couple of 240V 30A circuits for some heavier equipment like tablesaw, jointer, planer, etc. The 240V circuits will feed two or three receptacles each. My choice of 30A for the circuits is more "just because" instead of from load calculations. I have plenty of panel capacity (200A) and I could conceivably have two machines running at the same time (two people working together, not me with four arms). Also, most of the equipment I intend to run off these circuits is still on the "wish list" so I don't have any nameplate specs.
I do have the jointer though. It has a 250V 15A NEMA 6-15 type plug.
Now to my questions. Which receptacle style would you choose? I can nearly guarantee that no two pieces of equipment I purchase will have the same type plug. NEMA 6L-30 provides the amperage and twist lock. What is most common?
Next, I have pulled #10 for these circuits in EMT. I have pulled four conductors (Blk, Red, Wht, Grn). I know the neutral is probably overkill. But is this good future-proofing? And what would you do with the neutral if the receptacle choice has no place for it? Cap it in the box? Connect it to the neutral bus in the panel or cap it there too?
Finally, as I mentioned above, my jointer is equipped with the 15A plug. The nameplate rating on the machine is for 8.5A. I certainly don't want to put a matching 15A receptacle on the 30A circuit. Should I just change the plug on the jointer cord to a 30A version? Or do I need to derate my circuit to 20A. A jointer, dust collector, and something else at 8A each trips the 20A circuit...
Thanks in advance for your suggestions.