What is the minimum wire bending space required at a lay-in type lug connection for 4/0 AWG conductors?

For a lay-in type lug connection used with 4/0 AWG conductors, the minimum wire bending space requirement is indeed 10 inches. This requirement is essential to ensure that the wiring is sufficiently spaced to prevent damage to the conductors and to facilitate safe handling and operation.

Wire bending space is governed by the National Electrical Code (NEC), which specifies that the space allotted for the bending of conductors must be adequate to prevent undue stress on the wires. With larger conductors like 4/0 AWG, the bending radius increases to maintain the integrity of the insulation and conductor itself.

When sufficient bending space is allowed, it enables the conductors to be routed properly without sharp bends or kinks, which could lead to insulation damage or increased resistance in the circuit. Thus, providing a bending space of 10 inches aligns with recommended practices for safe and effective electrical installation.