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Whi149ch wire is the ground wire and which one is hot

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Green is ground

Posted on Apr 16, 2015

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Installed new florescent lightning and lights stay on when switch is off. What is wrong ?


What kind of switch?
Single-pole-3-way?
Does switch turn off Hot wire according to code... or is switch wired wrong and turn off neutral wire instead?
Identify Hot wire inside switch box, and make sure Hot is connected to switch:
http://waterheatertimer.org/How-to-wire-switches.html

Dimmer?
Is the light grounded?
If light is not grounded, it might not work right.
If there is a small short to ground , light may not work as expected.
Test hot wire to ground with multimeter?

Add a comment for followup after testing.
Gene
h

Sep 15, 2013 | Cooper Lighting Lighted Switch

1 Answer

How to conect three phase 5 wire conection to 4 wire 380volt three phase from the machine


Identify each of the 5 wires with voltage testing.
Find which breaker serves the 3-wire, and which breaker serves the 2-wire.
--You might have a 3-pole 3-phase breaker (with 3 hot wires) plus a single-pole breaker (with 1 hot and 1 neutral) ... giving a line with 4 hot wires and 1 neutral.
--Or you might have a 3-pole 3-phase breaker (with 3 hot wires) plus double-pole breaker (with 2 Hots) ... giving a line with 5 hot wires and no neutral.
The 4 wires from machine are probably 3 Hots and a neutral, or 3 Hots and a ground.

You need to identify where the ground wire is. One of the 5 wires from breaker box might be a ground.

Copy following links:
http://waterheatertimer.org/How-to-wire-3-phase-electric.html
http://www.electriciantalk.com/f5/

Gene
h

Sep 05, 2013 | Hardware & Accessories

1 Answer

How to wire qo220 circuit breaker


A QO220 breaker will provide 20 amps of power at 240 volts when connected to #12 copper wires.

Smaller wires can not be connected as it will result in a code violation - and they are not rated for 20 amp loads. Depending on the device to be connected, it will have a total of either 3 or 4 wires. (2) hot black, red or blue wires and (1) ground green wire. Four wire devices provide (1) white neutral wire as well.

Three wire devices will provide a bare or green ground and 2 hot wires. The two hot wires should be black, red or blue - but in the case of building cables like Romex - may simply be a black, a white and bare or green. The black and white in a 3 wire cable used to provide 240V are both hot, and bare or green is ground. There is no neutral in this case. The white wire should be marked with red, black or blue tape, paint, etc. where ever it is visible so that people know it is hot - and not a neutral.

Bring the cable into the panel and locate the ground bar and the neutral bar. The ground bar has only bare and green wires connected to it and the nuetral bar will have only white or gray wires connected to it. Connect your green ground to the ground bar and any white or gray wire to the neutral bar. Most homes with the service disconnect switch inside this panel have only one bar that serves both ground and neutral wires. If your panel has ground and neutral wires mixed together, you can bring the white and green/ bare to any open terminal in the ground / neutral bar. Don't put more than one wire into 1 terminal.

Next, install the QO220 breaker.

The remaining 2 hot wires should be routed and connected to the QO220 - one wire to each of the terminals. It does not matter which terminal gets which wire as long as they are in two different terminals.

That's how it is done. Good luck!

Jul 13, 2012 | Square D Co. QO220 Circuit Breaker

1 Answer

I don't know how to wire up my air conditioner. I have two hot wires, but no place to attach the ground wires. It is a self contained outside unit.


Your Ruud is a 220 volt AC unit and requires two hot wires and one ground. The ground wire goes to the case inside of the electrical box close to the contactor that the two hot wires connect to. I have included a picture of what the grounding lug looks like so you will have no trouble finding it.

Grounding lug

Jun 16, 2011 | Ruud UAMB Air Conditioner

1 Answer

I have a T103 that replaced a old Tork timer. my problem is i have 3 wires black,red white where do they go?


T103 has 120volt clock motor.
If your circuit is 240volt, then change T103 for T104.
Electricians test before hooking up wires.
Use ordinary tester.
Separate wires and turn on power.
Test each wire to bare ground wire.
Tester will light up on hot wire.
In absence of bare ground, test each wire against other wires or against grounded surface to isolate the hot wire.
Hot wire connects to terminal 1 on T103 timer.
Now test hot wire to other wires (exclude bare ground)
Tester lights up on Neutral wire.
Neutral wire connects to terminal A.
The last wire must go to Load, so connect this wire to terminal 2.
Bare ground wire connects to green ground screw.
Turn on power, click manual override to check if load turns on and off.
Lift and rotate yellow dial until current time lines up with silver pointer.
Put trippers on outer edge of dial at on-off times.
Off tripper are brass colored.
Each tripper is marked.
Minimum 1 hour on-off period.

Nov 30, 2010 | Intermatic T103 Indoor 120-Volt 40-amp...

1 Answer

How do you wire a intermatic t103


I'm looking at the T-103 sitting here in my office.
Terminals are labeled: A 1 2 3 4
I have about 10 different Intermatic timers on the shelves & each is a bit different

The T103 has a 120Volt (or 110V) clock motor
You need a white Neutral wire to operate the T103 clock

120V: Let's say your Load (light, fan, pump) is 120V
The white Neutral from breaker box connects to Terminal A
The 120V black Hot wire from breaker box connects to Terminal 1
The black wire going to Load (fan, light, motor) connects to terminal 2
The white wire going to Load connects to terminal A along with the Neutral
Ground wires connects to green ground screw
If your wires from breaker and wires to load are wired in reverse, the timer will turn ON the Load but the timer will not shut the circuit OFF.
To test which wire is Hot and Neutral, look at explanation at bottom of page.

240V: Let's say your Load is 240 Volts (or 220 Volts)
The clock motor is still 120V so you still need a white Neutral wire connected on Terminal A
Now you have 2 Hot wires coming from breaker box
Hot wire 1 from breaker box connects to Terminal 1
Hot wire 2 from breaker box connects to Terminal 3
Wire 1 going to Load connects to Terminal 2
Wire 2 going to Load connects to Terminal 4
Ground wires connects to green ground screw

What if you don't have a Neutral wire and you are wiring a 240V circuit?
240V circuits normally have 2 hots and a ground, but no neutral
Buy the T-104 timer
The T-104 has a 240V clock motor
Wiring for the T-104 is exactly the same as 240V wiring shown above for T103 EXCEPT there is no Neutral on Terminal A, and Terminal A is bare
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html

How to test which wire is Hot
Test requires wires with live electricity >>> this is not advisable without precaution
Stand on dry boards, do not touch anything metal, wear dry clothes, do not hold screwdriver in mouth, wear gloves, tape tester leads to wood sticks so hands are away from power
Remove wires from terminals
Separate wires so they can be tested
Turn on power
Test each wire to bare ground wire
Tester lights up on Hot wire(s)
If circuit is 120V, then there is only one Hot wire
If circuit is 240V, then 2 wires will test hot to ground >> these wires will be Hots 1 & 2
Test assumes circuit breaker is functioning normally.

How do you test for neutral?
If you have 120V line with only 1 hot wire, then one of the white wires will be Neutral?
Test Hot wire to each white wire
Tester lights up on neutral

Oct 17, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

Tail lights not working but everything has power


If you have power at the proper pins inside each socket, you will need to check for grounds. A turn or brake light bulb will have 2 hot wires, one is hot with the lights on = running lights. One will be hot when the turn signal or brake light is on. Now this is not always the case. A newer car may have individual bulbs, but each will have a hot wire and a ground. I think your problem is in the ground wiring. Check each socket for voltage against that sockets ground or in other words check each wire in each socket only, not to a common ground such as the body. If you have a ground wire in one of the sockets that is not grounded to the frame/body you can jump to one of the other grounds that is good.

Sep 28, 2010 | Nissan Sentra Cars & Trucks

1 Answer

3 prong connection to fusebox using hot wire, neutral wire, and ground wire. I know the hot wire and neutral wire connect to the circuit breaker, but I'm unsure about the grounding connection.


There will be a ground log/screw somewhere in the panel box. The ground wire goes to that.

If you see other bare wires going to a screw in type attatchment that is mounted to the panle box without insulators, that is the ground mount.

Oct 03, 2009 | Dryers

1 Answer

2004 Expedition Wiring Color Codes


brown would be the parking light hot wire
green / white would be the blinker hot wire
black yes ground ,
but according to the schematics , **** this color combination only applies to the left front

the right front should be :
brown would be the parking light hot wire
black ground , and a white / light blue would be the blinker hot wire

do you need the rear colors ?

brown is parking on both left and right rears
black is ground on both
light green / orange left blinker / stop light hot wire
orange / light blue right blinker / stop light hot wire

J5

Jan 15, 2009 | 2004 Ford Expedition

1 Answer

Understanding Outlet Circuit Test Results


open ground=ground wire (green) is not connected to the circuit box ground or to the earth ground.
(there should have steel rod place in the ground by the local electric company, and gtound wire is connected to that rod).
Open Neutral= same as open ground. unless you are testing 240V, which have 2 hot (110v) and a neutral (0V).
Open Hot= open 110v line (black)
hot/ground reversed= if you understand the above, then this sould be self explaintory.
same a hot/neu. reverse.

if you don't understand how electric wiring works, My suggestion is to stay out.

Dec 27, 2008 | IDEAL MCM TESTER GFI CIRCUIT

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