Hello, I am a New York Electrician that now has a house in Jersey. In NYC we use Romex for temp lighting only so I have a question about use in my home here in Jersey. I want to put an exhaust fan in my bathroom and on the other side of the bathroom wall is my furnace feeding my furnace is a 3 wire Romex with one leg not being used so I found my spare for my fan. Mounted on the side of my furnace about 2 feet down from the ceiling is the 1900 box with this 3 wire Romex going to it. Out the bottom of the 1900 box it switched to a 2 wire BX cable witch is going to a switch witch is the shut off switch to my furnace. My question is, Can I run exposed Romex out of the side of the 1900 box for about 4 feet around the furnace and threw the wall into the ceiling in the bathroom?? Or do I need to run BX because it's exposed?? I am confused because whoever installed this switched back and forth from romex to BX and I want to do it the rite way. Thanks In Advance, RocK
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