One (of 3)of my jobs is working for the government (FAA). One of the "engineers" said that he is allowed to make the following circuit: 30A 208 VAC ckt. to splice box via 8 AWG (wire remained from previous installation) for a hard wired coffee machine. From splice, 120 VAC 15A recp for cash register (via 10 AWG wire, probably for the same reason. How did they get the wire onto the device? I haven't seen that portion yet.). I'm guessing the "engineer" is basing it on 2002 NEC 210.19(A)(4). It seems to be kinda dangerous to me. Suppose that the cash register decides to nuke itself while the 30A breaker sits there fat, dumb and happy. The installation is in a small privately run cafeteria. 210.21 (B)(3) says all the devices on the circuit have to rated for the same amperage (Excep. arc welders). What say you?
