Question about Lutron Electrical Supplies

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First, I have power running thru a switch box. All white commons are tied together. Then I tap power to S1 switch leg with light working normal using a standard S1 switch. Then using a Lutron DV-600P the light stays on regardless of switch position. The same problem with DVLV-600P. Both DV switches were grounded. Any ideas? Thanks

Posted by wilcox_tim on


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Don Farrell

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Let's start at the beginning please. You have a source cable fed into an overhead outlet box or to a switch outlet box on the wall? This is critical because it tells me what kind of arrangement you actually have.

If the source is in the ceiling, then you are using switch loops and the wiring gets tricky because you have to "re-task" the Neutral (White) wire (Assuming you are here in the U.S.A.) that goes to the switch because it will become the feed to the wall switch.

However, is the feed is at the switch, then it is much simpler. Please let me know what you have in the form of wiring.

Also as an FYI, if you are using special switches, you may have to have equipment grounding conductor present at the switch. The electrical code no longer allows the use of a Neutral (White) conductor as a grounding conductor.

Posted on Nov 27, 2017


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Bruce Hathcock

  • 3600 Answers

SOURCE: I have installed a Lutron Diva Single-Pole dimmer,

No it means you have a short somewhere in the wireing. disconnect the power unhook the switches and use an ohm meter to test the wires to see if you have contact between the wires, black to white and black to bare ground wire. if it's a three way wire test all of them, if you used tsaoles to hold it in place check where you put the staples in you may find you have a staple ran threw two wires. Or if you pulled the wire and pulled it around a hard corner you may have pulled the insolation off somewhere the above test will confirm this. This is assumeming you are testing line voltage without a step down transformer or any other device in the circut

Posted on Nov 06, 2009


ken skalski

  • 152 Answers

SOURCE: i have to install a dimmer switch on 2 lights

ok lets try to straighten this out. usually one light will feed the next. so you have to intercept the wire before it goes to the first light. once you find the wire that goes to first of the lights in series seperate the cable to expose the white (neutral), black (hot) and the green (ground) if there is one. If it is metal wrapped cable then the wrap is the ground which grounds the box, which grounds the switch.... So now, the dimmer will break only the black (hot) lead. the white and the green pass through to the light (s). Connect the black lead from the breaker to either wire on the dimmer and the wire coming from the light to the other wire on the dimmer. ground to ground if there is one, otherwise the dimmer will ground itself to the box if its metal.

Posted on Dec 06, 2009

Heath Moyer

  • 767 Answers

SOURCE: Would this work or burn

This should work just fine as long as the breaker it is going to is at least 20 amps as this is the amount of amps that both fans would be drawing at once if the were both on. The 12/2 wire should be plenty to supply the 20 amps needed for the fans.

Posted on Jan 02, 2010


  • 145 Answers

SOURCE: Would this work or burn

Yes everything would work perfectly. I see no problems in your plan. Even if both fans were run off of one switch they would not burn out, the circuit it appropriately sized. You could even go a step down to save yourself some money and use 14/2 and 14/3 (supposing its only the fans running on the circuit). You can run up to 16 amps on 12 AWG wire and up to 12 amps on 14 AWG wire (80% of breaker tolerance). Also when it get to the fans use a wire junction box run your 3 wire cable in there and branch out to your fans from there with separate 2 wire cables. I believe that was your plan just wanted to clarify. Good luck!!

Posted on Apr 28, 2010


SOURCE: i just bought a switch

The key seems to be that you changed wiring in the ceiling box.

I suggest you make a drawing of the wires before and after. Track the route that the Hot wire takes.

The key question is this: Does Hot wire from breaker box arrive in the ceiling box first? Or does it arrive in wall box first?

I think Hot from breaker arrives in wall box first. And from there Hot wire goes to ceiling box ... and from ceiling box the hot wire goes to other plugs in room. If this is true, you will be one wire short for installing fan control switch.

I always make a drawing of existing wires before starting, so I can put it back the way it was. It sounds like you got a good handle on which wire goes where.

We used to solve the one-wire-short problem by making a simple project bigger. Figure out which direction ceiling joist run. See if you can slide fish line from fan ceiling box over to wall. If that works. Over at the wall, chop small hole in ceiling so you can feed wire up to fish line. Pull wire over to ceiling box. Next, staple other end of wire along ceiling over to location above wall box. Chop another small hole so you can feed wire down to wall box. And then install beautiful crown molding to hide the mess, and paint the room so you need new furniture.

Posted on Oct 03, 2010

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Hookup 3way switch from walltoswitchtoa light fixture

The first thing you should learn about three way switches is how they work. Once you know how they work they are so much easier to wire.

All neutrals (usually white) are tied together, which means the light bulb always has a way to return the current to the source (a complete circuit).

The hot (usually black and red) is what is opened or closed by the three way switches.


The main mistake when wiring a 3 way switch is not to tie the common to the power source on switch one and not to tie the lamp black wire to the common on switch two.

Notice that in the position above the lamp will be off. If you move the toggle down on the first switch then the power will be connected all the way through the the black wires to the lamp. If you move the toggle up on the second switch then the power will be connected to the lamp via the red wire. Either switch can then make or break the connection that allows the power to flow through to the lamp.

There are also variations of this configuration when the power is supplied to the lamp first. or if the power is supplied to switch two, but the principle is the same. In both of the later cases you must use the white wire to carry power or the hot leg and is not the preferred method, but is approved by the NEC. Typically, when this is done it is common to place a black piece of tape on the white wire to make you aware that the white wire might be hot. If you need the schematic for these variations, feel free to comment and I will be happy to create them.

I’m happy to help further over the phone at

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Regular switching and switch loops

A switch loop is a technique that is often used in home wiring to cut back on wire used and to make the circuit less complicated. In a normal switching circuit power comes into the switch box with the white wires tied together and black wires on the switch and then continues to the lighting box where black is connected to black and white is connected to white. With a switch loop the power starts at the lighting box in the black wire that does not go to the switch. That black wire is connected to the white wire that goes out to the switch (note the white wire must be taped with a small piece of electrical tape to show that it is now a powered wire). At the switch both black and white wires must be connected to the switch (the white wire here must also be taped). So now back at the light box you should have two wires. A white wire from your incoming power cable and a black wire from your switch cable. Now all you need to do is tie black to the black of your light and white to the white of your light (note: if you have terminals, white goes to the silver terminal and black goes to the brass terminal.) The wiring is done in this manner because in electrical work black and white make a light, and the the colors are never mixed up because it allows the next person to diagnose any problems much easier.

on May 19, 2010 | Electrical Supplies

2 Answers

I have a 12/2 (black/white/ground) power source to the leviton 1755 switch. And, I have two (2) 12/2's going to a Broan 100hl (vent, light, heater). Please help wiring switch and Broan; on...

The switch that you have works like 3 seperate switches. most of these switches will have gold screws
on one side and silver screws on the other side, lets say that the left is gold and the right is silver, and
the switch may also have a green screw for ground. your 12/2 with ground is your main hot, you may
want to mark it with a piece of tape, so you know it's the incoming hot. the ground off your hot will tie,
to the green screw on switch and continue and tie to your vent light which should also have a ground
the white coming off the hot is your neutral, it will go straight to your white or whites on your heater.
the black hot wire at your switch will go to each gold terminal on one side of the switch,there are two
ways you can do this, go to one side and just run a jumper, or put one wire on each gold screw and
tie in to your hot-black wire with a wire nut. now for the switch legs, you will need to run from your, switch
to your heater either another pair of 12/2s or a 12/3, each side of the switch that has one silver screw,
it's easier with a 12/3 normally a 12/3 will have a red,black,white,and ground.
top switch red to red on heater,black to black on light and the white blue on the vent,so from your switch
to the heater you would have to run a12/2 you would not use the black only the white and ground.
remember the white-neutral coming from the switch will be tied to all the whites at the vent,light,heater
except for the 10/3. the 10/3 is used stricktly for the switch legs. good luck!

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The Casablanca 88U33M Scandia Ceiling Fan only has three wires, a black, a white, and a green wire (ground). How do you wire the fan and light on seperate switches?

If you want to control both the light and the fan using 3-ways, then just wire 2 sets of the 3-way circuits. For this you need two sets of 3-wire between the switches, and one 3-wire cable from the switch location to the fan/light box.

At box #1 (a 2 gang box), you will run a power cable (marked cable #1) into it. From there you run 2 sets of 3-wire cables (identified as cable #2 & cable #3) to the other switch location, which will also be a 2-gang box (box #2).

Also from box #1, you will run a 3-wire cable (cable #4) to the fan/light box (box #3).

Hook up is as follows:

Box #3: connect black of cable #4 to black (fan), connect red of cable #4 to blue (light), connect white of cable #4 to white (fan/light), and connect the bare to the green.

Box #2: Connect white of cable #2 to identified terminal on 1st 3-way switch (#3). Connect red & black of cable #2 to the remaining screws of 3-way switch #3. Next connect white of cable #3 to identified terminal of 2nd 3-way switch (#4), and connect black and red to remaining screws. Tie all grounds together and terminate to both switches.

At box #1, connect black from cable #1 to whites in cables #2 & #3, using a wirenut. Connect white in cable #1 to white in cable #4. Connect black and red in cable #2 to 3rd 3-way switch (#1) and connect black and red in cable #3 to 4th 3-way switch (#2). Connect black in cable #4 to identified terminal of 3-way switch #1, and connect red in cable #4 to identified terminal on 3-way switch #2. Tie all grounds together and to the switches

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Electrical hookup

Tie all the black wires together and connect to the black power wire coming from the switch. Tie all the white wires together and connect to the white wire coming from the switch. If this does not work then what you have is a switch leg going to the light. This will be just a white and black wire coming from the switch with another power wire going in. Look at the switch and see if you have a white and black wire connected to the 2 screws. if so this is a switch leg. You will have to disconnect all the black wires in the light mount and find which one is carrying power in. Let me know what you find and we will proceed.

May 23, 2010 | Home

1 Answer

How do I wire for 2 seperat lights on a commom system?

{SW1}---Light 1 switched leg to fixture 1
HOT wire (Line or Feed)----{
{SW2}---Light 2 switched leg to fixture 2

The wire supplying power to the switches will be connected to the "LINE" terminals tied together with a breakaway tab (common feed). The upper "LOAD" side terminal will output to the first light and the lower "LOAD" side terminal will output to the second light. The neutral (White) wires if present will be joined together (wirenut).

All electrical work should only be done by qualified individuals.

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Would this work or burn out fans? Amps on one fan is 1.5 and the other is 5 amps I want to run a 12/2 wire from the panel and to the duplex switch and tie it into a 12/3 wire that goes to switch to...

Tell me what you are wanting to accomplish. Are you wanting to run each fan off a separate switch in the same duplex box? The reason I ask is because you are using 12/3 wire to the fans. If you are just going to have 2 switches then you are only going to have power to each fan from each switch. Therefore there is no need to run 12/3 wire. 12/2 is all that is needed and you would simply tie the fan and light wires to that one power source at the light/fan. Now if you are wanting to have a switch for the light and another switch for the fan at each location then that will take 4 switches. You can buy double stack switches and have 4 switches in a double gang box. Is this new construction or old? Please explain what you are wanting and I will be more than happy to explain how to wire it.

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Trying to hook up 2 lights to a light switch. Power is coming through one light then to wecond light and switch. How do I get the 1st light to work on the switch?

OK I asked for better info but, lets try this... If there is only one set of wires going to the switch, this is called a switch leg. Both wires,no matter what color they really are, are treated as black. so then in the first light box you connect one leg of the switch leg to the hot black incoming wire. the other leg connects to all other black wires in that box.Including the light. the white wires all hook together.( not the switch leg white, remember its really black)Including the light All Bare ground wires hook together. In the other box just match up colors and connect the wires together.Its as simple as that. Larry

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1 Answer

Im fitting a new light fitting i have 3 cables from the ceiling the orginal power cable , the switch cable and another cable to feed another light in my light fitting i have live neutral and loop what...

The grounds go together and perhaps to the fixture.

The white/ neutrals are also all tied together and one goes to the light. Note that one neutral may not actually be that, but is simply one of the pair of wires going down to the switch.

Then you need power connected to one leg going down to the switch (maybe a white one) and the return leg from the switch goes to the light.

Hope this helps. Let me know if not

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1 Answer

How to wire 3 switches in a 3 gang box

WARNING: Do not attempt to do this work unless you completely understand the information provided below. If in doubt call an electrician.
Always make sure the power is disconnected from all possible sources before making any connections. Your description of the problem indicates that there may be multiple power wires coming into the same box. In that case local codes may require that the box be partitioned to prevent exposure to voltages up to 220 volts.
You need to determine where each wire goes to know how to connect them together. You cannot rely on color alone. If the power supply runs through the box to the loads then most (but probably not all) of the white wires will be connected together. If the power runs to the load boxes first then none of the white wires in the switch box should be connected together. They are used to run the switched/dimmed power back to the loads (and should be taped to cover the white in the box). In that case each switch has its own power input and they should not be tied together. A wire (could be black or white with black tape) brings power from the load box, gets connected to the input terminal of the switch and the corresponding black wire carries the switched power back to the load. The fan/light switch will have one power in and a switched power out for the fan and another for the light. The 3-way will have one "power" in (or it could be the final power out to the light) and two "carrier wires that connect to the other 3-way switch. If the power supply goes through the switch box then there will be at least 10 wires in that box. In that case see the attached diagram: a5fa64a.gif

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