Hi and thanks in advance for help. Redoing laundry room
1) washer and dryer should be on separate circuit? This is not the case for me as a small bathroom exhaust fan/light and vanity light branch off in adjoining room. It's a 20 amp circuit
and total amps if everything on is 18.5. Is this okay or should I have a separate circuit wired to laundry room so it's by itself. Access to do this is not an issue.
2) light box over sink needs to be moved next to stud (it's on it now but there was a drop ceiling) I am doing a drywall ceiling now so need to move box off stud and next to it. If I do this, Box's back side will touch the sheet metal of hot air supply. My concern is a short could potentially make hvac throughout house hot? Is this a valid concern? Is there something skinny to put behind it to insulate from conduction?
An electric dryer will require a 30 amp 240 volt circuit. Washers are 120 volt. The code requires a 20 amp 120 circuit to serve only receptacles in the laundry area. The dryer, if gas, can share this circuit.
If you are using metal boxes, the box should laready be grounded, so touching the duct should not be an issue. With a plastic box it is even less of an issue.
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.