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Introduction

The Southwire 40130N detects AC voltage from 50V to 1000V.

A LED flashlight is built-in for added convenience.

With proper use, it will provide many years of reliable service. 

International Safety Symbols

Potential danger. Indicates the user must refer to the

manual for important safety information
Indicates hazardous voltages may be present

Equipment is protected by double or reinforced insulation

• If the tester is used in a manner not specified by the manufacturer,  

   the safety features provided by the tester may be affected.

• Check on a known live source within the rated AC voltage range  

   of the tester before use to ensure it is in working order.

• Insulation type and thickness, distance from the voltage source,  

   shielded wires, and other factors may effect reliable operation.

   Use other methods to verify live voltage, if there is any  

   uncertainty.

• Do not use if the tester appears damaged or if it is not operating  

   properly. If in doubt, replace the tester.

• Do not use on voltages that are higher than as marked on the  

   tester.

• Use caution with voltages above 30 volts AC as a shock hazard

   may exist.

• Comply with local and national safety requirements - particularly  

   with regard to arc-flash potential.

• Use approved personal protective equipment when working on

   live circuits.

WARNINGS

General Specifications

Detection voltage range
Frequency range
Batteries
Operating temperature
Storage temperature
Humidity
Altitude
Pollution Degree 
Safety Compliance

Maintenance

1. KEEP THE TESTER DRY. If it gets wet, wipe it off.
2. USE AND STORE THE TESTER IN NORMAL TEMPERATURES. Temperature extremes 

    can shorten the life of the electronic parts and distort or melt plastic parts.
3. HANDLE THE TESTER GENTLY AND CAREFULLY. Dropping it can damage the

    electronic parts or the case.
4. KEEP THE TESTER CLEAN. Wipe the case occasionally with a damp cloth.

    DO NOT use chemicals, cleaning solvents, or detergents.
5. USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE.

    Remove old or weak batteries so they do not leak and damage the unit.

Brief Description

Typical Applications

Category

Rating

Three phase circuits

and single phase lighting

circuits in commercial

buildings 

- Equipment in fixed installations such as 3-phase

   motors, switchgear and distribution panels 

- Lighting circuits in commercial buildings

- Feeder lines in industrial plants

- Any device or branch circuit that is close to

   a CAT III source
- Primary distribution panels

- Overhead or underground lines to detached

   buildings

- Incoming service entrance from utility

- Outdoor pumps

CAT III

CAT IV

Safety Category Ratings 

Connection point to

utility power and outdoor

conductors 

Detector Description

Operating Instructions

40130N Professional Non-Contact

AC Voltage Detector

Instrucciones de Operación

40130N  DETECTOR PROFESIONAL

DE VOLTAJE AC SIN CONTACTO 

50 V AC to 1000 V AC
50/60Hz
Two AAA 1.5V batteries

32°F to 122°F (0°C to 50°C)

14°F to 140°F (–10°C to 60°C)
80% max.
7000ft (2000m)
2
CAT IV-1000V  

1. Flashlight

2. Flashlight power button

3. Battery cover & compartment

4. Power button

5. “Power on” green LED and

    detector alert red LED.

6. Detector tip

Operation

1. Testing with sound alarm: 

Push the Power button and quickly release. You will hear

a single-beeping sound immediately followed by a steady green LED. The tester is now

activated and is operational with beeper alarm. Verify that the tester is functioning by

placing the tip of the tester near a known live AC voltage within the defined detection

range. The red LED will flash and the beeper will emit a pulsating tone.  

2. Testing without sound alarm: 

With the tester off, press and hold the power button.

You will see a steady green LED. Release the power button. The tester is now activated

and is operational without beeper. Verify that the tester is functioning by placing the tip

of the tester near a known live AC voltage within the defined detection range.

The red LED will flash without the beeper sound. 

3. Checking for the presence of AC voltage: 

Place the tip of the tester near an AC

voltage. If the tester detects voltage within the defined detection range, the LED at the

tip of the tester changes color from green to red. The red LED will continuously flash and

a pulsating beeping sound will be heard if the beeper is activated (refer to Testing with

sound alarm). The flash rate of the LED and the beeping rate will increase as the tester

gets closer to the voltage source.

4. Turn unit off: 

Press and hold the power button. Listen for a double beeping

sound and watch the “power on” green LED turn off. Release the power button.

The tester is now deactivated and is not operational. 

3. Replace the batteries (observe polarity). Use two AAA 1.5V batteries. 

6. Auto Power Off: 

After 5 minutes of non-use, the tester automatically powers

off to conserve battery life. Listen for a double-beep sound and watch the

“power on” green LED turn off. The tester is now deactivated and is not operational. 

7. Flashlight: 

Press and hold the button with the     symbol to turn on the flashlight.

Release the button to turn off the flashlight. 

5. Low battery indication: Scenario 1 – 

Powering on the tester: The “power on” LED

in the tip of the tester changes from a steady green to a blinking green and a series of

beeping sounds is generated. The tester then turns off. The unit is now deactivated and

not operational. The batteries require replacement. To replace the batteries, refer to the

Battery Replacement instructions.

Scenario 2 –

 Operating the tester: If the LED lights become dim and the tone fades,

the tester may require new batteries. To replace the batteries refer to the Battery

Replacement instructions.

3.

5. Verify operation by using the tester on a known live AC voltage.

NOTE:

 When batteries are loaded for the first time, please remove the white,

rectangular security strip before installing batteries.

Contents Made in China
Product distributed by Southwire Company, LLC

One Southwire Drive, Carrollton, GA 30119
©2014 Southwire Company, LLC.  All rights reserved.

southwiretools.com

1-855-SW-T00LS

Toll Free Technical Help

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5.

4.

1.

2.

3.

6.

4. Carefully slide the battery cover onto the tester making sure the cover is aligned

    with the slots on the tester body. Make sure the battery cover is completely closed.

4.

REGISTER YOUR PRODUCT

Register your product purchase at 

www.southwiretools.com

 or by scanning 

the QR code on this manual. At Southwire, we are dedicated to providing you 

with the best customer experience. By following a few quick steps to register, 

you can experience quicker service, more efficient support, and receive 

information on our future products. Simply provide your model number, serial 

number, and just a few pieces of information about yourself – it is that quick 

and easy. 

LIMITED WARRANTY AND LIMITATION OF LIABILITY ON

SOUTHWIRE METERS & TESTERS

Southwire Company, LLC warrants this product to be free from defects in 

material and workmanship for two years from the date of purchase. This 

warranty does not cover fuses, disposable batteries, or damage arising from  

an accident, neglect, misapplication, contamination, modification, improper 

maintenance or repair, operation outside of specifications, or abnormal 

handling of the product. Southwire’s sole liability, and the purchaser’s 

exclusive remedy, for any breach of this warranty is expressly limited to 

Southwire’s repair or replacement of the product. Whether Southwire repairs 

or replaces the product will be a determination that Southwire makes at its 

sole discretion.

SOUTHWIRE MAKES NO WARRANTY THAT THE PRODUCT WILL

BE MERCHANTABLE OR FIT FOR ANY PARTICULAR PURPOSE.

SOUTHWIRE MAKES NO OTHER WARRANTY, EXPRESSED OR

IMPLIED, OTHER THAN THE WARRANTY SPECIFICALLY SET FORTH 

HEREIN. SOUTHWIRE WILL NOT BE LIABLE FOR ANY INCIDENTAL,

CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES FOR

ANY BREACH OF THIS WARRANTY.  

This warranty is void if this product is used for rental purposes. No product 

reseller is authorized to extend any other warranty on Southwire’s behalf 

relating to this product, and no such reseller warranty will be binding on 

Southwire. If you have a warranty claim, or if the product needs to be

serviced during or after the warranty period set forth above, please contact

the Customer Service Department at 855-SWTOOLS (855-798-6657). 

The sender is responsible for all shipping, freight, insurance, and packaging 

costs associated with sending a product to Southwire. Southwire will not be 

responsible for lost or damaged products returned pursuant to this warranty.
All products returned to Southwire under this warranty should be mailed to: 

Southwire Company, LLC

Attention: Tool Warranty Return

840 Old Bremen Road

Carrollton, GA 30117

Scenario 3 –

 Powering on the tester: The green LED does not illuminate or is dimmer

than normal. The batteries require replacement. To replace the batteries, refer to the

Battery Replacement instructions.

Battery Replacement

Steps 1. and 2. 

Pull off battery cover

1.

 Press HERE 

(A.)

2.

 Pull down here 

(B.)

, applying a gentle

    bending force until you hear a click,
    then pull off the battery cover

A.

B.

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