Crazing shall not exceed what percentage of the physical spacing between noncommon conductors?

In the context of J-STD-001, "crazing" refers to the formation of fine cracks in the insulating surface of a material. The standard specifies that crazing shall not exceed 50% of the physical spacing between noncommon conductors. This is critical because excessive crazing can compromise the electrical isolation between conductors, leading to potential failures, such as short circuits.

Maintaining the recommended limit ensures reliability and safety in electronic assemblies. By restricting the percentage of crazing, the standard aims to mitigate risks related to dielectric breakdown and maintain the integrity of the circuit design. Thus, the correct answer emphasizes the balance between manufacturing tolerances and the functional requirements of electronic assemblies.