Running a power cable to a trailer which table is used? The rule 4-012 talks about flexible cord and rule 4-040 talks about portable power cable but both point to 2 different tables for cable size, Table 12 and 12A. The code doesn't implicitly state that Table 12A has to be used to run power out to a trailer. I could as easily choose table 12 which would give me a different size. What's the different between cord and cable definition?