Electrical Wiring in the Home/voltage tester

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Question
QUESTION: Mr Wilber I would like to know if there is a dependable voltage tester that would target a wire behind my drywall.Thank you
         Glenn Hennson

ANSWER: What is the problem you are trying to solve?
What do you mean by "target" a wire?

---------- FOLLOW-UP ----------

QUESTION: I would like to find out if there is any electric wires behind my drywall and where they are  as I want to install shelves on my garage wall and I do not trust that there are the metal plates over the studs if there were wires there.I do not want to chance putting a screw into a wire

Answer
I have never seen a voltage detector that would reliably locate energized cables in a wall. Most only work with close access to the cable, which suggests it is exposed, in which case you don't need the tester....
I have often traced cables with a circuit tracer, but I don't know how well the $69.95 models will work for you. I have a professional grade device which cost much more and still requires imagination and practice to use effectively.
Since it is the garage wall, it may be relatively easy to figure out where there may be wires, however.
I invite you to send photos of the area where you want to install the shelving and the reverse side of the wall if it is an interior wall backing up to an interior room.
Send them to robert@wilberelectrical.com
Also, give me an idea of what is above these areas and where your service enters, garage or basement.
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Electrical Wiring in the Home

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Robert Wilber

Expertise

Licensed Philadelphia electrician serving Delaware, Chester, Montgomery and Philadelphia County in Pennsylvania. I install and repair residential, commercial and industrial wiring and lighting. Troubleshooting and repair of problems that stump other people is my favorite. I am willing to help people figure out why things don`t work. I understand motor controls, transformers and machine wiring. I do not teach basics to novices or do free design work.

Experience

Experience in the area I have 44 years experience in residential, commercial and industrial electrical construction and repair, 480 volts and below. This is not to be confused with one week repeated two thousand times.

Education/Credentials
44 years experience in residential, commercial and industrial electrical construction and repair

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