Trystan Casey
Recessed lighting, also known as can lighting, can be a stunning addition to your home, providing ambient, task, or decorative lighting. Installing recessed lighting is a straightforward process, but it is important to be safe when working with electricity. Before beginning, ensure you have the right equipment and knowledge to turn off the power and verify that it is off. You should also obtain an electrical permit and have the work inspected when you're done. When wiring recessed lighting, it is important to follow applicable state and municipal electrical codes to avoid potential fire hazards or electrocution risks. This may include using a specific type and/or gauge of wire and ensuring you do not exceed the total wattage of the circuit. Electricians often use the Rule of Eights when routing cables to ensure they have enough wire to work with and that the wiring is securely fastened. Once the cables are in place, the individual recessed lighting fixtures can be wired, and the final connections can be made at the lights, switch, and receptacle.
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What You'll Learn
Planning and safety considerations
Planning Considerations:
- Ceiling Compatibility: Assess the depth, type, and heat exposure of your ceiling. Consider whether there is insulation present, as this may require the use of IC-rated (Insulation Contact) housings to prevent overheating and comply with safety codes.
- Lighting Purpose: Define the purpose of your recessed lighting. Will it be for added ambiance, task lighting in areas like kitchens, or purely decorative? This will guide your choice of light type and placement.
- Room Function: The amount and type of lighting needed will depend on the function of the room. For instance, task-oriented spaces like kitchens may require brighter lighting compared to living areas.
- Spacing and Placement: Plan the layout of your recessed lights to achieve optimal lighting levels while minimizing glare and shadows. Consider the height of your ceiling and the desired light intensity when determining the spacing between lights.
- Style and Trim: Choose a trim style that complements your decor and desired ambience. Understand how different trims affect light beams.
- Wiring and Load Capacity: Evaluate the load capacity of your current circuit to ensure it can handle the additional load from new recessed lights. Check the wiring type and ensure compatibility with the new fixtures.
Safety Considerations:
- Compliance with Standards: Adhere to electrical codes, such as the National Electrical Code (NEC), and local building codes and regulations. Ensure fixtures are rated for their specific location (residential, commercial, or wet locations).
- Permits and Inspections: Obtain any necessary permits and electrical inspections as required by local authorities or homeowner's associations.
- Power Off: Before beginning any work, turn off the power at the main fuse or breaker box for the room or the entire house if necessary. Verify that the power is off using a voltage tester.
- Safety Equipment: Wear protective equipment, including eye protection and breathing protection, to safeguard yourself from debris and dust during the installation process.
- Fall Prevention: Implement safety plans to prevent falls and other hazards, especially when working at heights.
- Wiring Connections: Ensure secure and corrosion-free wiring connections to prevent flickering lights or complete lighting failure.
- Voltage Compatibility: Verify that the recessed lights are compatible with the voltage of the circuit to avoid electrical issues.
- Grounding: Properly ground all fixtures according to NEC requirements to ensure safety.
- Wattage and Overloading: Do not exceed the total wattage of the circuit to prevent overloading. Consult an electrician if you need guidance on load management.
- Bulb Condition: Regularly inspect bulbs for wear or damage, and replace burnt-out bulbs to maintain lighting quality and prevent electrical system strain.
These planning and safety considerations will help ensure a successful recessed lighting installation that complies with regulations and enhances the functionality and aesthetics of your space.
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Finding a power source
Before you begin, turn off the power to the room at the main fuse or breaker box. If you cannot turn off the power to just that room, turn it off for the entire house. Use a voltage tester to ensure there is no electricity flowing through the wires.
To power your new lights, you will need to find an existing receptacle or switch box that contains a "hot" wire on a suitable circuit. The National Electrical Code prohibits connections to "dedicated" circuits, such as 20-amp small-appliance circuits in kitchens or dining areas, 20-amp laundry room circuits, and 20-amp bathroom circuits. Ensure that the circuit you choose will not be overloaded by the additional lights. To determine this, shut off the circuit in the main panel and go through the house, turning on lights and other electrical items to see what is already on the circuit.
Most lighting circuits in homes are either 15 or 20 amps, with 15 amp circuits being the most common. 20 amp circuits require 12-gauge wire, while 15 amp circuits use 14-gauge wire. Circuits may be loaded up to 80% of their nominal capacity. A 15 amp, 110-volt circuit may be loaded up to 1430 watts, theoretically allowing for fourteen 100-watt recessed lights on a single circuit.
If you are installing recessed lighting in a room with no existing light fixtures, you will need to run wiring through the joists. This can be done by drilling holes in the ceiling joists and fishing the wire through. You can use a fish tape or a tape measure to guide the wire. When all the wires are in place, repair the ceiling with some mud and tape.
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Drilling and wiring
Planning and Preparation:
Before you begin drilling and wiring, it is crucial to have a clear understanding of the project. This includes choosing the appropriate recessed lighting fixtures, trims, and lamps that match your desired style and functionality. Determine the ideal locations for the lights on the ceiling, considering any existing wiring or obstructions. It is also essential to obtain the necessary electrical permits and follow local codes and regulations for your safety.
Drilling and Creating Routes:
Once you have a plan in place, you can start creating routes for the cables. Use a specialized drill bit called an auger bit to drill 1" holes in the ceiling joists. Keep the holes centered and at least 2" away from the top and bottom of the joists. If you cannot access certain joists from the slot in the ceiling, reach through the recessed light holes to drill through them.
Wiring Process:
To begin wiring, use a wire stripper to remove 1/2" of insulation from the ends of the black and white wires, as well as the green ground wire if applicable. Connect the wires by joining the black wires together, the white wires together, and the ground wires together. You can use wire nuts for these connections, and some electricians prefer to wrap them with electrical tape for added security.
Connecting to Power:
To power your recessed lights, locate an existing receptacle or switch box with a "hot" wire on a suitable circuit. Ensure that the circuit can handle the additional load of the new lights. Do not connect to dedicated circuits as per the National Electrical Code. Once you've confirmed the circuit, make the final connections at the lights, switch, and receptacle.
Final Steps:
After wiring and connecting the lights, install the remodel housings in the ceiling. If you're using low-voltage lights and want to dim them, install a magnetic dimmer. Replace any drywall, patch the ceiling, and paint as needed. Finally, install the recessed light trim and lamps, following the manufacturer's instructions for exact procedures. Ensure you do not deviate from the specified trims and lamps to avoid inefficient lighting and potential overheating.
Remember, if you are uncomfortable with any part of the process or unsure about electrical safety, consult a licensed electrician to assist you in installing your recessed lighting safely and correctly.
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Final connections
Once the cables are in place, it is time to make the final connections at the lights, switch, and receptacle. The following steps outline the process for completing the final connections:
First, ensure that you have the correct fixtures for your installation, including IC-rated recessed lights if necessary. Turn off the power to the room or the entire house at the main fuse or breaker box. Verify that the power is off using a voltage tester to ensure safety. If you are uncomfortable working with electricity, consult a licensed electrician.
Next, connect the wires. For fixtures installed in series, there will be wires coming into and going out of the box, as well as a single black and white wire inside the box for the fixture itself. Remove 1/2" of insulation from the ends of the black, white, and green ground wires using a wire stripper. Connect the three black "hot" wires together with a wire nut, and connect the three white neutral wires together in the same way. If a ground wire is present, attach it to the junction box's ground screw or another metal surface of the box. Many electricians prefer to wrap the wire nut connections with electrical tape for added security.
After the wires are connected, install the remodel housings in the ceiling. If you are using low-voltage lights and want to dim them, install a special magnetic dimmer. Ensure that your lighting setup adheres to the National Electrical Code and any applicable state or municipal electrical codes. For example, the National Electrical Code prohibits connections to "dedicated" circuits in kitchens, dining areas, laundry rooms, and bathrooms.
Finally, restore the ceiling by patching and painting it. Install the recessed light trim and lamps, following the instructions included with your specific lights. Choose the appropriate trim style and lamps to avoid issues with inefficient lighting and dangerous overheating. Once the lights are installed, turn the power back on and check to ensure that they are functioning properly.
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Trims and bulbs
There are several types of trim to choose from, depending on your desired aesthetic and function. A flangeless trim, for example, will fit seamlessly with the surface, while a flanged trim is designed for a more prominent look. Square apertures are more modern, while circular apertures are classic. Bevel trims offer depth, whereas flat trims are minimalist. Wet-location trims are for areas where water could come into contact with the trim, such as a shower or sauna. Damp location trims are suitable everywhere else. Adjustable trims are suitable for sloped ceilings or walls that will be washed; otherwise, fixed trims are standard. Gimbal trims offer flexibility in directing light, while directional trims offer the most flexibility.
The type of bulb you choose will depend on the room size, ceiling height, and desired lighting effect. For example, 6-inch recessed lights are good for large rooms, while small 4-inch lights are better for accent lighting or small spaces. LED recessed lights are extremely energy-efficient, using 75% less energy and lasting 25 times longer than comparable incandescent bulbs. However, once an integrated LED bulb goes out, the entire unit will need to be replaced. If you are using low-voltage lights and want to dim them, install a special magnetic dimmer.
After choosing your trim and bulb, you can install them according to the instructions included with your recessed light.
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Frequently asked questions
It is important to be safe when doing a DIY project, especially when electricity is involved. Turn the wall switch in the room to the “off” setting. Turn off the power to the room at the main fuse or breaker box. If you can’t turn off the power for just that room, turn off the power for the entire house. Use a voltage tester to be sure there is no electricity flowing through the wires. Understand your existing situation and plan for the installation. Explore the different trims and how they affect the light beams.
Drill through the top plate and the joists to create a route for the cables. Reach through the recessed light holes to drill through joists that aren’t accessible from the slot in the ceiling. To power your new lights, find an existing receptacle or switch box that contains a “hot” wire on a suitable circuit. Make sure the circuit you choose won’t be overloaded by the additional lights.
Make final connections at the lights, switch and receptacle, and install the remodel housings in the ceiling. If you’re using low-voltage lights and want to dim them, install a special magnetic dimmer. Replace the ceiling drywall and patch the ceiling after the electrical inspector has approved the work. Then paint the ceiling and finally install the recessed light trim and lamps.
