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Southwire 40126N NCV Non-Contact Voltage Detector 24-600V AC with Flashlight
Detects 24 to 600 V AC without contact and includes a built-in flashlight
- FeaturesCat Iv 600v, Aaa, true
- Height1 L x 1 W x 1 H inches
- Width1 L x 1 W x 1 H inches
- Length1 L x 1 W x 1 H inches
- Weight0.16 pounds
- Sports Team1 Piece
- Detects live AC voltage from 24 to 600 V without contact
- Dual-range sensitivity covers low-voltage lighting and standard circuits
- Audible and visual alerts confirm voltage presence instantly
- Built-in front and rear flashlights illuminate dark work areas
- IP67 rated housing resists dust and water ingress
Southwire 40126N Non-Contact Voltage Detector
The Southwire 40126N is a pen-style tester built for electricians and maintenance technicians who need to confirm the presence of AC voltage without touching conductors. It operates from 24 to 600 volts AC and includes a built-in flashlight for low-light work areas. The compact body fits in a shirt pocket and runs on AAA batteries. Audible and visual alerts give immediate feedback when voltage is detected.
Dual-range detection limits
The detector covers a single range of 24 to 600 volts AC, so it cannot sense lower control-circuit voltages such as 12 volts AC or higher distribution levels up to 1000 volts AC. CAT IV 600 V rating means it is suited for measurements at the service entrance and similar high-energy locations. No low-battery self-test function is provided on this model. The IP67 dust and water resistance found on the advanced 40150N is not present here.
Installation and common issues
No wiring or configuration is required; simply insert the batteries and press the power button to begin testing. The auto shut-off feature conserves battery life when the tool is left on. A thin probe tip eases access to standard outlets. Common issues include false alerts from strong electromagnetic fields and missed readings if the tip is not held close enough to the live conductor. Battery contacts may loosen over time in high-vibration environments.
Highlights
- Detects live AC voltage from 24 to 600 V without contact
- Dual-range sensitivity covers low-voltage lighting and standard circuits
- Audible and visual alerts confirm voltage presence instantly
- Built-in front and rear flashlights illuminate dark work areas
- IP67 rated housing resists dust and water ingress
Specifications
| Brand | Southwire, Southwire Company |
|---|---|
| Features | Cat Iv 600v, Aaa, true |
| Height | 1 L x 1 W x 1 H inches |
| Width | 1 L x 1 W x 1 H inches |
| Length | 1 L x 1 W x 1 H inches |
| Weight | 0.16 pounds |
| Sports Team | 1 Piece |
| Type | Voltmeter |
Questions about this item
Which dual-range version should I pick, the 24–600 V AC model or the 12–1000 V AC model?
Choose the 24–600 V AC model for standard mains work up to 600 V; choose the 12–1000 V AC model if you also need to check low-voltage lighting down to 12 V AC.
What does the 600 V AC upper limit mean when I am testing a live circuit?
The detector will sound and flash when it senses any AC voltage between 24 V and 600 V, so it covers typical residential and light-commercial circuits.
What safety standard does the CAT IV 600 V rating cap in practice?
The CAT IV 600 V rating means the tool is rated for measurement at the origin of low-voltage installations up to 600 V, such as service entrances and meter bases.
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