Dedicated 30A circuit in your home? Did that breaker trip?
Coach should have an onboard Breaker (for 120VAC circuits) and Fuse (for 12VDC circuits) Panel. Have you found it? I don't know your model but if it isn't obvious, look on the sides and end of the Pedestal that supports the bed. That's where it is on our Jayco.
If only one circuit in the coach went out, it could be IN or Downstream Of, a GFCI outlet. Find the GFCI outlet and cycle it. Use a light to make sure it powered up.