From the hardware store I bought a NEMA 14-30 power cord, to which connected a NEMA 5-15 receptacle so I can plug in a 240V appliance.
^ DIY-ed the above adapter cord.
I'm not sure about the wiring, though. The red & black wires in the NEMA 14-30 has 240V across them, so I connected them indiscriminately one to NEMA 5-15's neutral & hot. I then proceeded to joining each's respective grounds. As for the NEMA 14's neutral, I just left it floating.
I really don't understand what I apparently think is Split-phase electric power that our dryer had been installed in. I take it it's a lot like a transformer with the 2 ends at full voltage (hot -- red & black) & the middle (neutral -- white) is the center tap?
So now, is it alright to draw full load while the NEMA 14-30's neutral is left floating? Doesn't it need to keep carrying current?