This gas furnace has a circulating fan at the top. Someone decided to power it by running a piecs of 'zip cord'.
- Wires are required to be in a raceway (300.3B). Romex, incidently, is a 'raceway.' You might consider 'zip cord' a cable, but-
- You aren't allowed to use zip cord in place of a permanent wiring method (402.11).
- All splices must be in a box (appliance cases are often considered a 'box')(300.15).
In addition, the 'zip cord' might be smaller than #14 (210.19A4); We can safely assume that this is not a dedicated circuit (422.12); and, While the unit MAY pre-date a grounding requirement. that wouldn't be a bad idea!