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Md Jony Islam
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Małgorzata Koperska, MD Steven Wooding
Last updated: August 13, 2025

Two Way Switch in Sensor Wiring Diagram for Light Control 2025

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Single Phase DP MCB

Single Phase DP MCB

Double Pole Miniature Circuit Breaker for single-phase supply

Single phase Light

Single Phase LED Light

Energy-efficient LED light for single-phase supply

Single phase Light

Well Light Holder

Recessed light holder typically used in ceilings/walls

2 Way Switch

2 Way Switch

A switch that controls one device from two locations

Day-Night Sensor

Day-Night Sensor

Light-sensitive switch that turns circuits on/off based on ambient light

[day-night-sensor]

Two way light switch wiring

Wiring diagram showing how to connect a two-way switch with a motion sensor to control a light from two locations with automatic and manual override.

warehouse wiring connection

A warehouse wiring connection diagram defines the entire electrical installation, along with the incoming power, and the end-use locations. It displays the distribution boards, lighting, connection with equipment, and safety devices so that the operations are made safely and efficiently.

Formula & Table Summary:

Components: Two SPDT switches, motion sensor with relay output, light fixture, live (L), neutral (N), traveler wires.
Connections: Live supply connects to sensor and Switch 1; traveler wires connect Switch 1 and Switch 2; sensor output controls light load; neutral completes circuit.
Operation: Light turns ON automatically on motion or manually via either switch.
Safety: Disconnect power before installation and follow wiring standards.

TerminalConnectionFunction
Live Supply (L)Connects to sensor and Switch 1 commonPower input
Switch 1 TravelersConnect to Switch 2 travelersSwitching paths
Switch 2 CommonConnects to light fixtureLoad control
Sensor Load OutputConnects in series with switches to lightControls light ON/OFF on motion
Neutral (N)Connects to sensor and light fixtureCompletes circuit

sensor light control wiring

This two way switch on sensor wiring diagram shows two way manual switch with automatic motion sensor connection so that a standard fixture may be controlled by a manual switch or a motion sensor. This will enable the light to be controlled automatically when people want to detect a motion or manually by either of the two switches positions. The wiring links load output of the sensor and two switches in such a way that there is no overlap of switching in the system. Normally the live supply connects to the sensor and the first switch, the other connector with traveler wires connection between the two switches and the sensor pick up controls the load of the light. Such an arrangement is found in stairways and corridors to save energy yet retain the ability to run manually.

light control sensor switch

Motion DetectedSwitch PositionsLight StatusRemarks
YesAnyONLight ON by sensor automatically
NoSwitches ONONManual override ON
NoSwitches OFFOFFLight OFF

Frequently Asked Questions - Two way light switch wiring:

What is a two way switch in sensor wiring?

A system that allows manual two-way switching combined with automatic sensor control.

Can the light be controlled manually and automatically?

Yes, using two way switches and a motion sensor.

How are the switches connected?

Two SPDT switches connected via traveler wires.

Does the sensor need a neutral wire?

Yes, neutral completes the sensor circuit.

Can the sensor override the switches?

Yes, sensor output controls the light load automatically.

Is grounding necessary?

Yes, for safety reasons.

What happens if motion is detected and switches are OFF?

Light turns ON automatically due to sensor.

Can I install this myself?

Only if experienced with electrical wiring and safety precautions.

What if the light stays ON constantly?

Check wiring connections and sensor sensitivity settings.

Is this setup energy efficient?

Yes, it saves energy by using automatic motion detection.

Md Jony Islam

Md Jony Islam

CalculatorToolsProject

Founder of Earthbondhon.com

a free online tools website designed to make everyday and engineering-related calculations easier for students, professionals, and hobbyists. The site offers a wide range of basic calculators across key categories, including Electrical Calculators, Electronic Calculators, and Time & Date Calculators.