# Best circuit tester

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#### Tom willis

##### New Member
I'm looking to purchase a good circuit tester. I need something to reach long distances and to be more specific as to know exactly which wire is at the other end. Any advice or first hand accounts are accepted. Lemme know. An I'm not looking for something like a 110 VAC circuit finder with the three prong plug. It hardly ever traces properly, and only works if you initially have power, dumb.

#### Tom willis

##### New Member
Just to clarify, I want to remove one wire and find its other end over about 60 ft. Wether it's a frequency generated trace or a closed circuit trace or whatever, I just wanna know my options from some testers that other people have used.

#### KMoffett

##### Well-Known Member
How many wires in the cable(?)?

Ken

#### ronsimpson

##### Well-Known Member
What is on the other wires?

#### KMoffett

##### Well-Known Member
Multimeter and a battery:

If two wires, disconnect both ends. Place a battery between the pair at one end. Measure the polarity at the other end. If more than two, connect all the wires at one end together, except one. Then measure the continuity between the wires at the other end. The one with no continuity to other wires identifies it. Do this until you have two wires unidentified, then go back to the two wire solution.

Ken

#### Tom willis

##### New Member
Multimeter and a battery:

If two wires, disconnect both ends. Place a battery between the pair at one end. Measure the polarity at the other end. If more than two, connect all the wires at one end together, except one. Then measure the continuity between the wires at the other end. The one with no continuity to other wires identifies it. Do this until you have two wires unidentified, then go back to the two wire solution.

Ken
This is a good idea, but not exactly what I'm looking for, just a single wire, but I suppose I could use this method to find the one wire, it is romex afterall.

#### KMoffett

##### Well-Known Member
If you have Romex, isn't that already color coded? Or is there more than one Romex coming to a point of interest? Maybe a sketch?

Ken

#### Tom willis

##### New Member
If you have Romex, isn't that already color coded? Or is there more than one Romex coming to a point of interest? Maybe a sketch?

Ken
It's a rat's nest of wires in an old basketball court. Many disconnected, but none in conduit. All going to 3 jboxes. I have the pleasure turning it into a functioning assembly.

#### Mickster

##### Well-Known Member
Are you looking for a particular run of something like 2 or 3 core plus ground, in a bundle of like cabling at the other end?

#### Nigel Goodwin

##### Super Moderator
Yes, something like that. Getting warmer, is it reliable over 60 ft distances?
It's worked fine every time I've used it, no idea of specific distances but some have certainly been well over 60 feet.

#### gophert

##### Well-Known Member
A 12 V battery lead-acid battery and a bucket of salt water.

Connect a pair on one end, Just dunk the whole stack in the other end. The pair that are bubbling are your match. Clip off enough to make sure you don't have salt water corrosion later.

#### Nigel Goodwin

##### Super Moderator
This is what I was going to suggest. You may have to cut the power to the immediate area to get rid of 60 Hz / 50 Hz background noise.
I've never found that a problem, although it might just be down to the circumstances I've used it in?.

#### KevinW

##### Member
I used a similar tone generator and probe for years in telecommunication and they will work for miles.

Just to clarify, I want to remove one wire and find its other end
You will need a pair of wires.

#### ClydeCrashKop

##### Well-Known Member
I have often thought it was "Operator Error" on my part. If you are tracing a pair of wires you can attach the red & green clips to them and get a nice strong signal. The alternative is to attach a clip to the wire of interest and the other clip to ground. I work on boats and am usually tracing one wire. Ground wires go off in all directions and confuse the issue. So I usually attach one clip to the wire of interest and get a weak signal and have to eliminate all other electrical noise to hear it.
And, your signal tracer is probably much better quality than mine.

This is the manual for a good one.