Clayton Equipment Company Ltd, now known simply as Clayton Equipment Ltd or CEC and CEL, is a locomotive construction company that specialises in rail equipment, design and build, tunnelling, mining, metro, mainline and shunter locomotives.

The NZR RM class Clayton steam rail motor was a unique railcar that was operated by New Zealand Railways (NZR) for New Zealand's national rail network and one of only two steam railcars to operate in New Zealand - the other being 1925's RM class Sentinel-Cammell.