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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.

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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.

Posted on Oct 03, 2009


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To connect to breaker panel I have 2 15 amp breaker how do I connect my wireing where the black go and the white go what about the two breaker

circuit breakers snap on to the panels. the black(or red) hot wires attach to the breakers. the circuit breaker protect the hot/live wires. the white/neutral wires attach to the neutral bar in the circuit breaker box just like the ones that are already there. the green/ground wire attach to the ground bar, like the ones already there. however, if you have to ask, you may not want to do this on your own. find someone who knows what they are doing. electricity kills. if you really don't know what you are doing, can get you severely injured, or start a fire, or hurt someone else. find some help, please.

Mar 15, 2015 | Electrical Supplies

1 Answer

4-prong to 3-prong Power Cord Conversion.

On a 4-prong power cord you have 2 hot wires, one neutral wire, and one ground wire. On a three prong cord, you have 2 hot wires and one neutral/ground wire. The difference is the on four prong the neutral wire goes to electrical neutral bus in the breaker panel and the ground wire goes to the ground bus in the breaker panel. Since the neutral and ground buses, although separate, both go to physical ground, on a three-wire setup, you are just putting the neutral and ground wire together, Most dryers actually have a place at the pigtail connection to do just that.

Sep 09, 2014 | Whirlpool Duet 7.0 Cu. Ft. Super Capacity...

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

How can i install the transformer for intermatic timer t10004rt3

Intermatic phone number: 815-675-7076

T104RT3 has 120Volt 300 watt transformer with 12-13-14Volt output.

The timer mechanism is 240Volt T104M.

Since both 120Volt and 240Volt are needed, the wire coming from breaker box should have 2 Hots and a neutral, plus the ground wire.
So you need 12-3 with/ground wire or 10-3 with/ground wire.
See image of typical wires plus ratings:
See example image showing 2 hots and neutral and ground coming from breaker box:

The 2 hot wires come from a 240Volt circuit breaker.
The neutral comes from the neutral busbar, or can be accessed from tying into any white neutral on nearby 120Volt outlet.

How to wire timer:
Connect 240Volt hot wires to terminals 1 and 3 on timer. Connect 240Volt timed output to terminals 2 and 4 on timer.

How to wire transformer:
Connect 120Volt transformer two different ways. (a) white wire connects to neutral wire and black wire connects to terminal 1 on timer. With this wiring, the transformer is ON at all times. (b) white wire connects to neutral wire and black wire connects to terminal 2 on timer. With this wiring, the transformer will be ON when timer turns on.
Do not put both stranded wire and copper wire under same screw terminal. Instead connect transformer wire to solid copper wire using wire nut.

Sep 24, 2011 | Intermatic Timer Single Circuit Control...

1 Answer


All the neutral and ground (or "earth") wires in a building are tied (or "connected") together at the incoming service main breaker panel - and that is the only place they should ever be tied together - because it is "upstream" of all the fuses and/or circuit breakers which are there to protect the hot (or "live") wires for the various circuits installed in the building.

In the absence of an earth wire (= ground wire in US/Canadian English), if the appliance suffered some damage that caused a short circuit between the high voltage "hot" lead and the case of the appliance, the damage would make the case live and it would cause an electrical shock to anyone who touched it.

If the case is earthed by using a ground wire (= earth wire in British English), if that same damage occurred the hot lead would immediately be shorted to ground and in theory cause the fuse to blow or circuit breaker to open, thus eliminating the danger of a live case.The ground or "earth" wire is a circuit's safety protective wire that normally carries no current.

It is there to force a fuse to blow or a circuit breaker or GFCI to trip if a fault condition occurs in any appliances, their flexible cords or plugs that are connected into the circuit.

By carrying away the excess current in a fault condition - which should cause the protecting fuse to blow or circuit breaker to trip - the "ground" or "earth" wire protects the building and its occupants because the power should be cut off before anyone gets electrocuted or any overloaded circuit wiring or appliances catch on fire.

The neutral is the normal "return" wire: in systems where the load is supplied from only one hot (or "live") wire, the neutral completes the circuit and carries current back from the load to the power station.

All the neutral and ground (or "earth") wires in a building are tied or linked together at the incoming service main breaker panel. This is the only place they should ever be tied together because it is "upstream" of all the fuses and/or circuit breakers protecting the hot (or "live") wires for the various circuits installed in the building.

Warning: we must never assume that a neutral is safe to touch: it has to be checked with a voltmeter or a voltage indicator to be sure it is not "live". This is because a neutral wire is designed to carry current under normal circumstances.

So, if a neutral wire going back to the incoming main breaker panel has not been properly connected - or suffers a deliberate disconnection or some accidental damage which causes it to break - then it and any neutral wires connected to it further downstream will go live up to the break because of being connected to the downstream loads which still have hot feeds coming into them!

That is why we should never use a neutral as a substitute for a proper, separate, ground or "earth" wire.

Aug 01, 2011 | Refrigerators

2 Answers

Put in a new breaker box, wiring to furnace is not right. There are 3 wires coming from the furnace, a red wire, a brown wire and a white wire. The white wire is the ground, the red wire is attached to a...

I don't know where you live, so I don't know if there is a color code used like there is here, in Massachusetts. Typically, white is neutral. Neutral and ground are not really interchangeable terms to electricians - but often are to homeowners. Read this until you understand:

1) If you have two separate bars in your panel, and one has only white and / or gray insulated wires connected and the other has only bare or green or green and yellow striped insulated wires connected, you must connect the white wire to the bar with the white / gray wires. Do NOT connect it to the bar with bare / green insulated wires.

2) If you have one or more bars in the panel, and both have a mixture of white / gray and bare / green wires, and the bars are screwed directly into the panel back - or have a jumper connected between them, you should be able to connect the white wire to any available terminal on the bar(s).

Colored insulated wire (not green, white or gray) usually means it is not neutral or ground. In an electrical panel, most times if it is not neutral or ground, it is "hot". If there are two colored (hot) wires and a single white or gray (neutral), the white goes to neutral bar and the hot wires go on adjacent circuit breaker terminals - in this case, a 2 pole circuit breaker.

Your gas or oil fired furnace likely operates on 120 volts (hence the white wire for neutral), while the AC compressor and blower is probably 240 volts (hence the need for the second colored wire). You may need to connect these two hots to one "2 pole circuit breaker" for the AC to work.


A typical 2 pole circuit breaker has two handles tied together - and internal connections.

Look at the wires to get an idea as two what size breaker they need to be connect to - #8 copper 40 amps, #10 copper 30 amps, #12 copper to 20 amps and finally, #14 copper to 15 amps. If you are unsure, and my background on the way things should normally be do not jog your memory, STOP. call an electrician and have it connected correctly and safely.

Jun 06, 2011 | Heating & Cooling

1 Answer

I need to know how to wire a hookup for an air compressor that takes 230V.

If you are installing a 3 prong plug you would only have 3 wires, none are color coded. The middle is your ground/neutral wire and the outer 2 are both hot so, as long as you put the middle wire onto the middle stud, the other 2 hot wires can go on either hot stud left or right they are both the same. If you are running a new circuit from the breaker box then you will need a 2- pole 240 volt breaker and what every amperage is listed for MAX breaker size on the compressor. Should be able to run # 10ga wire that is good for 30amps. The 2 hot wires would connect to the breaker and the middle wire would hook to ground in the breaker box.... You can use black or red wires for the hots and I would use green wire for the ground. Or you can run 10/3 romex wire to the outlet from the breaker box if you don't use conduit.......If you use romex the white wire will be ground/neutral and the other two the power wires it doesn't matter which goes where .....

As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Mar 28, 2011 | Porter Cable C2002 150 Psi 6 Gal...

1 Answer

New intermatic T101 timer problem - timer is not

Manual override lever is good overall test of T101 120Volt timer.
T101 timer has 3 terminals: A 1 2

See wiring diagram on following link:

Electricians test, they don't guess.
So test your wire:
Separate all wires for testing.
Use ordinary 2 prong tester.
Tape wood sticks to tester leads to keep hands away from power.
Stand on dry boards. Do not hold or touch anything metal.
Turn power ON.
Test each wire to bare ground wire.
Tester lights up on Hot wire. 120V circuit has only 1 Hot wire. If you have 2 Hot wires, you might have 240Volt circuit and need T104 timer. If circuit has 1 Hot wire, then that Hot wire must connect to terminal 1.
If you have NO Hot wire, then check circuit breaker.
Hot wire is identified.
Now test Hot wire to all other wires, except bare ground wire.
Tester lights up on Neutral wire. Neutral wire must connect to terminal A.
If you have NO Neutral wire, then additional wiring is needed, or circuit needs further testing to see what type of wiring you are working with.
Bare ground wires connect to green ground screw.

Notice there are small white wires also connected to terminals A and 1. These small white wires power the 120V clock motor. With Hot on terminal 1 and Neutral on terminal A, the clock motor will run, and yellow dial will rotate.

If timer dial does not rotate after connecting Hot ans Neutral, then test voltage across Hot and Neutral to make sure it reads 120V.

Your circuit should have 2 wires remaining.
These wires go to 120Volt load (fan, light, motor)
Connect these two wires to terminals A and 2.
Try manual override.
If Load turns ON-OFF, then timer is wired correctly.
If Load does NOT turn ON-OFF, then reverse Load wires on terminals A and 2.

Add a comment any time.

Dec 28, 2010 | Intermatic & Indoor/Outdoor Rain Tight...

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

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

Trying to hook a 3 prong hook up with 4 prong cord how do i do it?

A 3 prong plug is for 240 volt (hot-hot-ground) the 4 prong plug is for 120/240 volt (hot-hot-neutral-ground). If your device requires a 4 prong plug, it is not a good idea to connect it to a 3 prong circuit (you will create a possible lethal electrical condition). If your device requires a 3 prong connection, a 4 prong cord can be used by not connecting the neutral (white wire). If you have any questions, let me know.


Mar 31, 2009 | Maytag Dryers

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