I recently purchased a prewired 30a rv subpanel to plug in a travel trailer while sitting at home. The subpanel is complete with a 30a breaker and receptacle. Is it acceptable to run the romex (10-2) to a new 50a breaker in the main panel having the 50a feed the 30a breaker?
Electrical – Adding a 50a breaker in main panel to feed 30a rv breaker and plug
electricalwiring
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Best Answer
No, you can't do that. The 10-2 romex has a 30 to 35 amp maximum depending on the insulation. The breaker in the main panel's job is to protect the 10-2 so it has to be a 30 AMP breaker, not the 50 AMP.
If this is going to be a permanent type installation you need to think about running your cable in such a way that it's not a safety hazard or a code violation. You can't have it lying on the ground running from you panel to the trailer.... maybe conduit from the panel to the outside wall and have a receptacle.... then a plug from you subpanel.