One of the newest models at this week’s Chicago Auto Show is only 2 inches long. It’s not Detroit’s latest sub-subcompact. It’s a small electrical switch assembly that controls automobile door locks, ...

Note: This article references the 2017 NEC because the Philadelphia area — the jurisdiction where this author teaches and works— is still operating under that version of the Code. Electrical switches ...

1. Switches are a normalized commodity. The saying “no two snowflakes are alike” also applies to switches. Unlike connectors in which male/female coupling can be possible, even if the two components ...