Yes, it is possible to run power from inside cabinets to an externally mounted fixture. However, it's essential to follow electrical safety guidelines and local building codes when performing any electrical work.
Here are the general steps to do this:
Check Local Codes and Regulations: Before starting any electrical work, familiarize yourself with local electrical codes and regulations. Some areas may have specific requirements for running wiring, especially if it involves passing through walls or cabinets.
Choose the Fixture Location: Decide where you want to mount the external fixture. Ensure that the location is suitable for the type of fixture you want to install and that it won't obstruct any cabinet doors or drawers.
Plan the Wiring Route: Determine the best route for running the electrical wiring from inside the cabinet to the fixture location. It's crucial to choose a path that won't interfere with other cabinet components or existing electrical wires.
Turn Off the Power: Before you begin any wiring work, turn off the power to the circuit you'll be working on. You can do this by switching off the corresponding circuit breaker in your electrical panel.
Drill Holes: Carefully drill holes through the cabinet walls to run the wiring. Use appropriate-sized drill bits to ensure the holes are just large enough to accommodate the wires without creating unnecessary gaps.
Run the Wiring: Feed the electrical wiring through the holes you drilled, making sure it's properly secured and won't be pinched or damaged when closing the cabinet doors.
Install an Electrical Box: Inside the cabinet, install an electrical box to house the wiring connections. Secure the box to the cabinet wall using screws, and follow the manufacturer's instructions for the specific type of electrical box you're using.
Connect the Wiring: Inside the electrical box, make the necessary wiring connections. Typically, this will involve connecting the black (hot) wire to the fixture's black wire, the white (neutral) wire to the fixture's white wire, and the green or bare (ground) wire to the fixture's green or bare wire. Use wire nuts to securely fasten the connections and wrap them with electrical tape for added safety.
Mount the Fixture: Mount the fixture on the external surface as per the manufacturer's instructions. Follow proper installation procedures and use the provided hardware to ensure a secure attachment.
Test the Fixture: After completing the installation, turn the power back on and test the fixture to ensure it's functioning correctly.
If you're not confident in your electrical skills or knowledge, it's best to hire a licensed electrician to do the work for you. Working with electricity can be dangerous, and improper installations can lead to electrical hazards or violate building codes. A professional electrician will ensure that the wiring is done safely and up to code.