How were twist-on wire connectors invented?

It was invented by a Scottish immigrant to Canada in 1914 named William Marr, when at the time the process was to 'solder and wrap' the connections. Which you twist them together dip them in molten solder and then wrap them with tape. read more

Twist-on wire connectors are available in a variety of sizes and shapes. While their exterior covering is typically made from insulating plastic, their means of connection is a tapered coiled metal insert, which threads onto the wires and holds them securely. read more

Wire - Wikipedia Wire was probably invented in Mesopotamia or in Egypt, about 3500 years ago. read more

product standard for twist-on connectors for use with aluminum wire, and as a result, these type connectors with aluminum wire combinations were suddenly no longer available. However, in the mid-1990’s, a twist-on connector with copper to aluminum wire combinations was reintroduced, and is still available today. read more