Thank you, everyone for your assistance. Please allow me to offer some more information. I have a 2005 Open Road 318 by Pilgrims. Before I ordered the trailer, the salesman informed me that it would have 50 Amp, which influenced my decision to buy the Open Road. When the trailer arrived with 30 Amp, the dealer stated that it can be converted to 50 Amp, which they have attempted to do. The first time I plugged it in to 50 Amp it immediately tripped the main breaker. I took it back to the dealer and they have unhooked one of the feed wires. This panel box has a solid bus bar. Should it not have two bus bars like the panel box in my house? (I have an electrician friend that helped me with these terms. I know nothing about electricity.) I have emailed the Pilgrim's factory with these questions, but so far they have ignored me. Can anyone offer some help?