Power was supplied to the cars via a 600 volt cable connected to the locomotive's dynamotor. Freight runs were nearly all comprised of ore loads, hauled in  ore cars each of which could carry .
The passage describes how power was delivered to the cars, and the type of freight they carried. The cars received power from a 600-volt cable connected to the locomotive's generator. Most freight trains were made up of ore loads transported in ore cars that could hold .