My US bus' electrics are over 30 years old, so a refresh is required. There are a number of challenges to a conversion; nothing on a 40 year vehicle is simple. The first problem is what to do about the power inlet? You could of course, leave the existing side inlet well alone and add a commando plug underneath the bus, or inside the engine bay, but as mentioned by @matty, do be careful with the hookup cable if the socket is inside the bus where a door or engine lid could slam shut, trap it and damage it. However, my S072 has a perfectly functional inlet for the 120V 15A AC service. So, why not use this? The problem is that the socket is rated for 120V...why not put the commando plug in the inlet? Well, the hole in my US style inlet box is 39mm dia and a commando plug just won't fit, its more like 46mm and too long and too wide. So we need a different type of socket, one that is smaller but that is rated for 250VAC and at least supports 16A service. Here's the inlet when removed from the bus. @theBusmonkey sourced a replacement socket from the US that was rated to 250VAC, an elegant solution. However, I wanted something I could easily get a replacement or a spare within the UK. This is where Neutrik came to the rescue, the NAC3 series has a 26mm diameter plug and socket that is rated 250VAC and 20A and is blue, so is the same colour as a standard hookup.