Ah the winter doldrums in Louisiana. Too wet to dig footings so I’m trying to nail down some electrical details. I’d treasure some advice on the following – I plan to run a couple of 220V circuits for future growth while I’m wiring the shop even though I have no tools or utilities requiring that now. The new shop will be designed such that part or all can be insulated and heated/cooled other than naturally. One bit of advice I came across was to place four-plex boxes as you wire the place and put 220V alongside 120V circuits. This raises the question for me – how can you fool-proof the receptacles? I plan to use NEMA 5-20R connected to 12/2 wg for the 20 amp 115V circuits. I’m sure the same receptacles would be fine for 220V wiring where the Amps are cut in half at higher voltages. Do you all recommend a different NEMA config for the other duplex when using 4-gang locations? I might consider the same NEMA 5-20R in a separate box that has a hinged cover and appropriately marked for 220V, but even that seems unwise if a future owner, stranger, etc comes along.
Thanks for helping with this. My only 220V circuits at home are dedicated and hard-wired with no plug-ins.
-- Like Guy Clark sez - "Sometimes I use my head, Sometimes I get a bigger hammer"