Section 312.6(B)(2) and Table 312.6(B) provide the requirements for wire-bending space where straight-in wiring or offset (double bends) is employed at terminals. Section 312.6(B)(1) applies only to 90 degree bends. The notes to Table 312.6(B) permit a reduction in required
bending space for removable and lay-in wire terminals. The removable terminal wire connectors can be either the compression type or the setscrew type. However, connectors are required to be of the type intended for a single conductor (single barrel). Removable connectors designed for multiple wires are not permitted to have a reduction in bending space.
To facilitate wiring, a terminal may be placed on the stripped end of the conductor, which has been cut to the proper length. The terminal is crimped or lightly torqued on the wire as intended. The wire is bent and routed to facilitate mounting onto the stud or landing pad for proper connection. All mechanical screws, bolts, and nuts involved should then be torqued to the proper value. See the commentary following
the informational note to 110.14 regarding tightening torques.
In accordance with the notes to Tables 312.6(A) and 312.6(B), when Table 312.6(A) is used, bending space is measured in the direction in which the wire leaves the terminal, and when Table 312.6(B) is used, it is measured in a direction perpendicular to the enclosure wall.
A lay-in-type terminal is a pressure wire connector in which part of the connector is removable or swings away so that the stripped end of the conductor can be laid into the fixed portion of the connector. The removable or swingaway portion is then put back in place and the connector
tightened down on the conductor. Exhibit 312.1 applies the rules of 312.6(B)(1), 312.6(B) (2), and Tables 312.6(A) and 312.6(B) to the wiring for a lay-in-type terminal according to the following list, where T stands for the dimension to the terminal, and G stands for dimension of the gutter.