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How to Install an Occupancy Sensor Light Switch – Part 2

Bob Jackson
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by Bob Jackson

This project is continued from How to Install an Occupancy Sensor Light Switch – Part 1.

Remove the Light Switch

With the circuit breaker Off to disconnect the electricity from the light circuit, the side screw terminals are loosened to remove the two black wires. The ground screw is loosened to disconnect the bare copper ground wire from the toggle switch. You may need to pry open the looped wire ends with the tip of screwdriver to slip the wires off the screw shank.

Toggle Light Switch Removal: Wiring Disconnect

Dress the Light Switch Electrical Box Wires

The Leviton ODS10 Occupancy Sensor Wall Switch will be attached to the electrical box wires with twist on wire nuts. The light circuit wires in the electrical box must be straightened and trimmed, or dressed for the Leviton ODS10 switch installation. Gently uncurl the looped wire ends with needle nose pliers so the wire is mostly straight, then perform a final straightening with the needle nose pliers held lengthwise as shown to flatten the wire in the “up/down” direction. Rotate the pliers 90 degrees and squeeze again to straighten the wire end in the “left/right” direction.

Leviton ODS10 Switch Installation: Straighten the Electrical Wires

The three electrical wire ends are now (nearly) straight, suitable for wire nutting:

Electrical Wall Switch Box Wiring: Wire Ends Straightened

The exposed bare copper ends of the black wires are too long for wire nutting. I cut the exposed ends to 5/8 inches long with electrician’s pliers such that the bare copper portion will be fully covered by the wire nuts. Note that there is no need to shorten the bare ground wire.

Leviton ODS10 Occupancy Sensor Light Switch Installation: 5/8″ Wires

Leviton ODS10 Wiring Diagram

My lighting application corresponds to the “Single Control Application” wiring diagram in the Leviton ODS10 instructions. The wiring is straightforward:

  • Line side (Hot) black wire (tagged with a piece of blue tape) is connected to the black wire on the Leviton ODS10.
  • Load side black wire is connected to the blue wire on the ODS10.
  • Bare ground wire is connected to the green wire on the OSD10.

The “load” in the wiring diagram are the compact fluorescent lights (CFL).

The ODS10 requires the ground wire connection to operate.

Leviton ODS10 Occupancy Sensor Wall Switch Wiring Diagram

Leviton ODS10 Occupancy Sensor Wiring

Wire nuts are not included with the Leviton ODS10, so you must provide these. I’m using red twist on wire nuts rated for minimum of two (2) #14 gauge and a maximum of four (4) # 12 gauge wires. My electrical box house wiring is NM-B 14/2 (i.e. 14 gauge, 2 conductors plus ground) and the ODS10 has 14 gauge stranded copper wires.

To wire the ground connection:

  • Pull the pre-stripped insulation off the end of the end of the ODS10 green ground wire.
  • Hold the bare copper ground wire from the wall box against the ODS10 green ground wire.
  • Pre-twist the two wires clockwise with your fingers.
  • Make sure the wire ends are even.
  • Twist on the red wire nut in a clockwise direction (righty-tighty) until tight.
    No need to over do it, the wire nut will cinch down tight when the wires bottom-out.
Leviton ODS10 Occupancy Sensor Ground Wire Connection

Follow the same procedure to wire nut together the ODS10 blue wire with the load-side black wire. Recall the load side black wire WAS NOT tagged with the blue tape.

Leviton ODS10 Occupancy Sensor Switch: Blue Load-Side Wiring

The Leviton ODS10 black wire is nutted to the line side (hot) black wire tagged with the piece of blue tape as seen on the left side of this photo:

Leviton OSD10 Occupancy Sensor Wall Box Wiring

Mount the Leviton ODS10 to the Wall Box

Gently fold the wires into the electrical wall box with easy bends, taking care not to kink or pinch the wires:

Leviton OSD10 Occupancy Sensor: Wall Box Installation

Mount the ODS10 to the wall box using the included two long screws:

Leviton ODS10 Occupancy Sensor Switch: Wall Box Screw Mount

Leviton ODS10: Time, Range & Light Adjustment Dials

I removed the adjustment dial cover by prying it off with the tip of a screw driver. Next, I turned On the electricity by switching On the circuit breaker. I decided it was better to test the ODS10 before installing the wallplate cover just in case there were a wiring problem.

The timer, range and light sensitivity dials are left-to-right respectively:

Leviton ODS10 Occupancy Sensor Switch: Time, Range and Light Adjustments

I turned the timer dial the left slash mark to select the 30 second time-out for testing, then adjusted the range sensitivity to maximum and the light level dial to a fairly dark setting. I tested the occupancy sensor by walking into the room and was very happy when the lights came on as soon as I was within sight of the ODS10. I set the timer to a 10 minute time-out to save electricity; the lights will stay on so long as motion is sensed, resetting the 10 minute time-out so being caught in the dark is not a concern. The push button On/Off manual override also worked fine.

Unbreakable Nylon Wall Plate

Since this is a workshop area, I purchased a Leviton unbreakable nylon wallplate with matching rectangular and toggle switch cutouts for the new OSD10.

Leviton Unbreakable Nylon Wall Plate

The nylon face plate looks very nice. The Leviton ODS10 has a red LED that flashes when it senses motion so you know it’s working.

Leviton ODS10 Occupancy Sensor Operation: Red LED for Motion Sense

Leviton ODS10 Occupancy Sensor with Compact Fluorescent Lights

The new Leviton ODS10 occupancy sensor works great! The lights turn on automatically when I’m at the threshold to the room. The sensor even turns the lights on when the exterior door is opened as I enter from the outside, detecting the motion of the door. And I never have to bother with turning off the lights. The occupancy sensor is a really nice convenience! I installed two more of the ODS10’s in the bathrooms.

Leviton OSD10 Occupancy Sensor with Compact Fluorescent Lights (CFL)

Thanks for reading,

Bob Jackson

electronic ballastHow to Install an Occupancy Sensor Light SwitchLeviton Occupancy Sensor Light Switch PR180Leviton Occupancy Sensor Wall Switch ODS10Leviton ODS10 Occupancy Sensor Wall Switch
Bob Jackson
Bob Jackson
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