15A AC POWER EXTERNAL INLET & 16A RCD IP44 - BLACKCMS Electracom manufacture a range of DIY power points and cables that can be soft wired together. CMS products allow the DIY builder to fit many of the 240V cables and power points into the walls of the Motorhome or Caravan during construction, and therefore limit the onsite time of a qualified electrician to the final inspection and testing. A standard set up would include the CMS power inlet that accepts 240V power into your RV via a 15amp