These are the maximum allowable weight specifications of an RV. Look for a Federal Weight Certification sticker and a RVIA-approved sticker located inside the RV or outside near the exit door.
CCC
Cargo Carrying Capacity xxxx
GAWR
Gross Axle Weight Rating – the maximum allowable weight on an axle.
GCWR or CCVWR
Gross Combined Weight Rating – the maximum allowed weight for a vehicle with all of its contents and passengers along with the weight of any towed vehicle and its contents.
GVWR
Gross Vehicle Weight Rating – the maximum allowable weight of the vehicle. The sum of the UVW and the NCC, including all contents, fuel, fluids, LPG, clothing, bedding, food, and passengers.
NCC (deprecated)
Net Carrying Capacity – the maximum weight of all occupants and goods. This rating has been replaced by Cargo Carrying Capacity (CCC).
OCCC
Occupant & Cargo Carrying Capacity (motorhomes only).
SCWR
Sleeping Capacity Weight Rating.
UVW
Unladen Vehicle Weight.
UK equivalent weight ratings
Maximum Authorised Mass (MAM) = GVWR
Train Weight = GCWR
Unladen Weight = UVW