Mike Dolt Enterprises
Mike Dolt Enterprises
User: Jimmy7, Location: Boston, MA
Asked on: Friday, May 28, 2021 at 8:08 am EDT
Answered on: Thursday, June 20, 2024 at 10:56 am EDT
Question: I've got a customer who is adding new kitchen cabinets in their single family home. Due to the cabinet layout, they're asking me to change a switch and receptacle in a two gang box to a switch over receptacle in a single gang box (Due to space between a cabinet spacer and a window). The switch is on a 15 amp circuit, and the receptacle is on a 20 amp circuit. I'm not sure how many cables are in the box, as I have not seen the job yet, just some pictures. Is it even possible to do an installation like this? Meaning, do you have to simultaneously disconnect both circuits like a receptacle on a multiwire circuit (Two circuits feeding one yoke). I have two different amperages in this situation, so I couldn't use a two pole breaker. Could I use a handle tie between the two breakers (Not sure about the panel make, I think he said it was Eaton)? My other concern is box fill, but I'll know better about that when I see it.Thanks!
Feasibility
Yes, it is possible to install a switch over receptacle in a single gang box, even with different amperage circuits.
Circuit Disconnection
You do not need to simultaneously disconnect both circuits like a multiwire receptacle. Each circuit is independent, and you can disconnect them separately.
Circuit Protection
Since the amperages are different, you cannot use a two-pole breaker. You will need to use two single-pole breakers to protect each circuit.
Handle Tie
A handle tie between the two breakers is not necessary. The breakers will be protected independently.
Box Fill
You will need to calculate the box fill once you see the number of cables in the box. Refer to the NEC Table 314.16(B) for allowable box fill.
Installation Steps
1. Turn off the power to both circuits at the breaker panel.
2. Remove the existing two-gang box and wiring devices.3. Install a single-gang box in the same location.
4. Run the wires from the switch and receptacle circuits to the new box.5. Connect the switch wires to the switch terminals.
6. Connect the receptacle wires to the receptacle terminals.7. Install the switch over receptacle in the box.
8. Turn on the power and test the switch and receptacle.
Additional Considerations: If the box fill is too high, you may need to use a larger box or move the wires to a nearby box. Make sure to use the appropriate color coded wire nuts to connect the wires.* Follow all local electrical codes and manufacturer instructions. Flag for review