Assertion: nm cable | /r/HasProperty | listed by the nec
Facets:
value: in 1926
type: TEMPORAL
Source sentences:
text: NM cable was invented by the Romex company in 1922 and was first described and listed by the NEC (National Electrical Code) in 1926, but it did not come into prevalent use until the early 1960s when plastics replaced woven rayon as the material used for the outer sheathing.