How do I determine the size of my circuit panel. I want to add a 30amp plug socket for my RV hookup.

Do you have an open breaker slot in your current panel? If so you can install a 30 amp breaker of the same brand as the panel or existing breakers. However, you must run at least a 10 gauge wire or cable to your RV receptacle. Wire sizes, gauges, for breakers

To learn this, assuming you mean the amp rating:

Quote:

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Originally Posted by rickmorones

how do I determine the size of my circuit panel.

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Find the Main Breaker or fuse that protects the panel, that will be the ampacity rating of that panel.

To further clarify tk's response:

1. For the main breaker to be the capacity of the panel, it must be a main panel. If it's a sub-panel, the answer above may not apply.

2. The numbers written on the breakers DO NOT have to sum to less than the main breaker rating.