Code Change Summary: Revised code language. The 2020 NEC^® will now allow a feeder tap to be made directly to a lug or terminal.

Until now, the NEC^® has never really addressed feeder taps with code language that specifically allows a “feeder tap” to be made at a busbar.

A feeder is defined in Article 100 as all circuit conductors between the service equipment, the source of a separately derived system, or other power supply source and the final branch-circuit overcurrent device.

The NEC^® does not have a general definition of a “conductor” but according to the Merriam Webster Dictionary, a “conductor” is a material or object that permits an electric current to flow easily. A copper wire is one type of conductor but so is a busbar.

In 1925, the NEC^® defined a “conductor” as a wire or cable suitable for carrying an electric current. Between 1928 and 1930, the definition was changed to a wire or cable or other form of metal suitable for carrying current. Currently, the NEC^® defines only bare, covered, or insulated conductors.

It is quite common to see a feeder tap connection made to a lug, terminal, or busbar (see image). Now, there is code language that will specifically permit the practice.

Below is a preview of the NEC^®. See the actual NEC^® text at NFPA.ORG for the complete code section. Once there, click on their link to free access to the 2020 NEC^® edition of NFPA 70.