The switch or circuit breaker must be within sight from the appliance or lockable per 110.25 [422.30(B)].
Yes, you can. Two other options you might consider are an accessible plug or attachment fitting [422.33(A)].
The rating cannot be less than the rating of the appliance [422.33(C)].
- It must have a marked off position and it must disconnect all ungrounded connectors [433.34].
- They must be of the indicating type [422.35].