Question about Klein Tools 69127, Low-Voltage Tester,

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Voltage tester shows red light on all the 3 cables(including the ground) of a 14-2 home circuit,

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HOLD ON!!! The Klein 69127 is an automotive tester to be used for voltages between 6V-24V, AC or DC. The higher voltage in your home could possibly damage the unit as well as yourself. It would be safer for you to use the non contact tester to verify voltage Klien NCVT-1

Posted on Aug 18, 2010


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Testing household outlets with 3 light tester

Have you tried to determine if the problem outlets might be controlled by a wall-switch? This could be the case if separate black wires coming into the box are being used for the different outlets.

Dec 04, 2012 | IDEAL Electrical Supplies

1 Answer

Wiring 12/2 or 12/3

12/2 cable (Romex, UF, etc) consists of two insulated #12 and one uninsulated #12 conductor or wire. The two insulated wires have a black and a white colored insulation. Number 12 copper is rated for 20 amps. This cable can carry a single circuit with ground.

12/3 cable is identical to 12/2 with the exception being that it has a third insulated conductor that is colored red. This third wire allows one cable to supply 2 circuits (one on black and one on red with both sharing the white and ground wires) with one cable run. It is much cheaper to buy and install a single 12/3 cable than two 12/2 cables to get two circuits into the same general area.

Twenty amp 120 volt circuits in dwelling units are required for kitchens, dining rooms, washers, disposals, and other appliances that require more than 12 amps (but less than 16 amps) to operate. Twenty amp 240 volt circuits are typically for specialty appliances and devices such as electric heaters, pumps, etc. Generally, 20A/240V appliances devices do not need a 12/3 cable as they only require connections for Line1, Line2 and ground. One insulated conductor would be unused in a 12/3 cable serving such a device. A 12/2 cable is run instead and the white wire is taped red (any color other than gray or green, to indicated that it is no longer a neutral) at each location it is accessible, such as wiring compartments, panels and junction boxes.

Circuits fed by 12/2 cables will connect to single pole circuit breakers and those fed by 12/3 cables must be connected to double pole circuit breakers. Check the National Electrical Code (NEC) to determine which locations require GFCI (Ground Fault Circuit Interrupter) supplied circuits. The latest (2012) NEC requires most new circuits in dwelling units (residential) to be protected by AFCI (Arc Fault Circuit Interrupter) type circuit breakers. Consult your local building department to find out if the NEC has been adopted in your locality before installing.

Lastly, a 12/3 cable would be run between 3 way & 4 way light switches and hard wired smoke detectors; but only if they are on a 20 amp circuit. Most circuits in the home are 15 amp capacity, especially for lighting circuits. A 14/3 cable would be run on these circuits as there is no need for the additional expense of a cable with the larger #12 wires and the increased labor to handle, install and connect the wires to device terminals.

I hope this helps. Please rate my reply - thanks!

Jan 18, 2012 | Siemens Hammering

1 Answer

I have a 274V outlet w/ switch for my garbage disposal. I hooked it up and used a MICRONTA 3-prong circuit tester on the power outlet to make sure it was wired correctly and it showed that the right LED...

you are missing something
you describe 3 led lights --2 green and one unlit then you go on about a red led light
suggest that you get in an accredited electrician to check the circuit
it is possible that you are testing with the wring tester

Mar 27, 2017 | Cooper Wiring Devices 274V-BOX DECORATOR...

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When the car is left overnight the battery is flat the next day. Also the dash boad lights are on indicating a problem with the brakes and the airbag.


Jan 02, 2011 | Peugeot Liberte Cars & Trucks

2 Answers

When we measure from hot to neutral we get between 40 & 50 Volts

this is "phantom voltage." To be sure of this you can try shorting the hot with the ground. Should not short. The voltage isn't dangerous. It often happens when two hot wires are in the same cable. For example a 12/3 romex with a shared neutral. When one hot wire is turned off and the other is still energized, voltage can leak from one wire to the other, causing a reading of 50 or so volts on the non powered wire.

Nov 17, 2009 | IDEAL Vol-Con Xl Voltage/Continuity Tester

2 Answers

Wiring diagram for 4 way switches

A four way switch has four or five screws on it depending on its manufacturing date. Usually, 2 black, 2 gold, (and one green if the switch was manufactured after 2003). There should be four hot conductors usually 2 black and 2 red that attach to the device (and one bare ground after 2003). Attach one black and one red that come from the same cable (look into the back of the box to determine which black and red go together) to the black set of screws. Then attach the other black and red from the second cable into the gold set of screws.
Many people make the mistake of thinking that both the black wires go onto the black screws and the red wires go onto the gold screws. This is incorrect and will only allow power to pass through when the switch is in one of the two positions.

Oct 31, 2009 | Rotary Lot 10 Leviton Ivory Light Dimmer...

1 Answer

I want to tow the jeep and need to know thecorrect

Review this information and links:
- Trailer 4 Way System Diagram
- Accesories and Instructions


1.) Determine a suitable location for mounting the circuit protected converter in an out of the way spot near the left tail lights in the trunk or on the frame rail, if mounted under the towing vehicle.
2.) Ground the white ground wire by placing the ring terminal under an existing screw attached to a clean metal surface or by drilling another 3/32" hole and using one of the self tapping screws provided.
3.) Disconnect the tow vehicle's negative (-) battery cable.
4.) Cut the in-line fuse holder loop wiring.
5.) Using a ring terminal (3/8 inch for top terminal or 1/2 inch for side terminal), attach an in-line fuse holder (with fuse removed) to the positive (+) terminal of the battery.
6.) Route black 12 gauge wire from the fuse holder to the converter passing under or through the vehicle.
Note: When passing the wire through sheet metal always go through an existing grommet, add a grommet or use silicone rubber to insulate the wire from the hole.
7.) Attach 12 gauge wire to the fuse holder with the yellow **** connector.
8.) Reconnect the tow vehicle (-) negative battery cable. Note: See tow vehicle owners manual for any special battery reconnection and instructions.
9.) Determine if the towing vehicle has a 2 wire or 3 wire system.

2 Wire System
  • Has same bulb for stop and turn signals.
  • Some vehicles have a separate bulb for stoplights but also have a combination bulb for turn and stop. These cars should be wired as 2 wire systems, using the wires going to the common bulbs.
  • Note: Attach the crimp on spade terminal provided to the red stop wire and ground it along with the white wire.

3 Wire System
  • Has amber turn signals, separate.
  • Has separate bulbs for stop and turn signals (both red).
  • Note: Attach red wire to tow vehicles brake light circuit.
10.) Using a circuit tester or volt ohm meter (VOM), determine which wire attached to the left taillight assembly is the left turn wire. Attach the units yellow left turn wire to this wire using one of the blue wire taps provided. Determine which wire is the taillight circuit and attach the module's brown tail / license wire to it with a wire tap. Determine which wire is the stop circuit and attach the module's red stop wire to it with a wire tap (for 3 wire systems only, see step 9).
11.) Route the units green right turn wire to the right side of the vehicle. Determine which wire is the right turn circuit and attach the green wire to it with a wire tap.
12.) Install the fuse into fuse holder and test the installation with a circuit light or trailer.
13.) Secure all loose wiring with cable ties.

Testing Procedure
With the ground wire connected and all of the other circuits attached, attach the ground lead of a circuit tester to the exposed ground terminal of the 4-flat end. Activate the tow vehicle left turn, right turn, tail and stop lights one at a time. Probe the three receptacles of the 4-flat end to confirm proper functions. If testing with a trailer, make the proper connections and do the same test as the circuit tester using the trailer lights. If a function on the trailer lights does not work properly, disconnect the trailer lights, turn functions on vehicle off and recheck function with the unit with a circuit tester. Then check the trailer wiring for potential circuit problems.

I hope help you with this (remember rated this help).

Good luck.

Oct 11, 2009 | 2006 Jeep Wrangler

1 Answer

Ground Wire is testing as hot

Assuming you are in the United States, the convention with 120 volt ac circuits is that the Black is HOT, the White Neutral, and Green is Ground. Assuming your tester is a neon type light suitable for 120 volt ac circuits, the tester will illuminate when the tester leads touch the black hot and the white neutral, and also when the tester leads touch the black hot and the green ground. the tester should not illuminate when the leads simultaneously touch the white neutral and the green ground. It appears from your description that Your circuit description is operating correctly.. Surprise? ... your tentative assertion "when I touch the black hot wire and the copper ground wire with the tester. This is should not happen, correct?" this assertion (YOURS) is wrong, rather, it would be correct for it to illuminate between the black hot and the green(you say bare copper) ground. It sounds to me, if you need to ask this question, "YOU SHOULD NOT BE FOOLING AROUND WITH LETHAL 120 VOLT HOUSE VOLTAGES AND CURRENTS" I strongly recommend you should hire a licenced electrician. Besides getting electrocuted, you could set fire to the HOUSE, and maybe not when you are looking but when you are asleep, or away from home. PLEASE BE FORWARNED. thank you. Regards --- GooseBay_Camper

Sep 27, 2009 | Measuring Tools & Sensors

1 Answer

I have 6 outlets that do not work.

I would start by determining if these 6 outlets are on the same circuit. Also I am usually not too confident in the non contact voltage tester you are using. They tend to give false positives if they contact anything or even if you move them fast. I would invest in an inexpensive multimeter whcih will allow you to test actual voltage across the poles and ground and also check for continuity between poles/ground (WITH CIRCUIT OFF ONLY).

Did these outlets previously work properly?

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