Final answer:
Romex cable must be stapled a maximum of 12 inches from a wall outlet, and then every 4.5 feet along its run, in accordance with the National Electrical Code.
Step-by-step explanation:
The question pertains to the electrical wiring standards for securing Romex cables within a building structure. Romex, which is a type of non-metallic (NM) sheathed cable, must be stapled a maximum of 12 inches from a wall outlet box, according to the National Electrical Code (NEC). After that initial staple, it must then be stapled at intervals not exceeding 4.5 feet (54 inches) along its run. This requirement ensures that the NM cable is adequately supported and protected against damage.
It is important for electricians and individuals working with electrical installations to comply with these requirements to ensure electrical safety and to pass inspections. The NEC may have updates or local variations, so it is essential to check the most current local codes when performing electrical work.