I think every house need a Voltage Detector. Especially when house owner changes the light bulb.
The day I send my car to Goodyear for service, is a good day. I have a walk and found a store. I went in and purchased this Greenlee GT-16 Adjustable Non-Contact Voltage Detector. It is just below $30.00.

It is a little bit expensive, but it worth.
Let us see the features of it.

  • Adjustable to safely detect power and low voltage
  • Safely detects AC voltage without touching the bare conductor
  • Adjustable for use on power wiring plus lighting, thermostats and other low voltage circuits
  • Use to detect voltage in outlets, lighting fixtures, wires and cables
  • Finds breaks in wires
  • Identifies hot and neutral conductors
  • Low battery indication
  • Accessories included: (1) 1.5V AAA battery
  • Lifetime Limited Warranty

See specifications:

  • Application : Use To Detect Voltage In Outlets, Lighting Fixtures, Wires And Cables
  • Battery : (1) 1.5 V AAA
  • Frequency : 50 – 500 HZ
  • Measurement Category : CAT IV, 1000 V
  • Standard : C/US UL Listed, CE Listed
  • Type : Adjustable, Non Contact
  • Voltage Rating : 5 – 1000 VAC

David Yin

David is a blogger, geek, and web developer — founder of FreeInOutBoard.com. If you like his post, you can say thank you here

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