hello to all, i converted my attached garage into a den, and now i’m wanting to add a extra sub panel on the exterior of my house for my rv hookups, i’m doing both 30 & 50 amp with more breakers for future expansions, without having to punch more holes into my brick wall ” if possible”.

the original breaker box is in the converted garage (i.e. inside of the house) and the meter loop is of course attached to the exterior of the house, i’m wanting to add the extra sub-panel to the outside meter loop, is this possible and if so how?