I have a cabin, wired for 220 and even has a sub-breaker near the outlet. There are 3 wires to the connector (two hots and the neutral). The range-top that I want to hook up is a 4-wire model (2 hots, neutral and ground.)
When I put a tester's negative to the neutral, of course either of the hots shows 120v. When I touch the negative to the metal box, the same result with each of the hots (though I can't see any ground wire adapter on that metal box. Touching wallboard with the negative does NOT ground it; when I touch the negative to drywall and the positive to either of the hots, I get nothing.
does this mean that the metal box is itself grounded somewhere/how (so I can just attach the ground wire to it?)
Is there any cause for concern about wiring these directly, without a plug?