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How do you determine which wire is hot at a switch that has the white wires connected to each other and two black wires from different romex going to the switch?
One of the black wires is the "feed" hot wire coming from the circuit's breaker on the incoming power panel.
The other black wire is the "switched" hot wire going to the load. (The light or whatever appliance the switch is controlling.)
If you don't know how to tell which black wire is which, the hot is usually the wire connected to the top screw on the switch. In Canada, there is a rule that all hot wires are to be connected to the top of switching devices.
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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.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
What else can I help you with?
Is it possible to wire a dimmer switch off another dimmer switch for a completeley different light?
No, the dimmer switch needs its own individual circuit power supply to feed the fixtures connected to it. The black of the second dimmer switch can not be connected to the red wire of the first dimmer switch. Now if you are talking about using a common "hot" to feed two dimmer switches then this can be done. The neutrals will be common also. So what you should have is two black wires connected together with the incoming "hot". Two neutrals connected together with the incoming white. The red from each dimmer is then connected to its own individual fixture load.
Why would a light switch have two black wires for power and two whites caped off?
Having two black wires connected to a light switch indicates that it is a switch loop, where one black wire brings power to the switch and the other black wire carries power to the connected light fixture. The two white wires capped off are neutral wires from the power source and the light fixture, which are typically not connected to the switch.
When wiring a wall switch which color wire goes on the common terminal screws?
The common wire is typically black and goes on the black screw terminal of a wall switch. If the wire is white, it should be reidentified as a hot wire with black tape before connecting to the switch.
I have Two black wires and one red wire conected to a switch. Which is hot and which is neutral?
The red wire is typically the hot wire and the black wires are neutral wires. However, it's important to verify the connections using a voltage tester to ensure correct wiring and avoid any electrical hazards.
When connecting a 240V line with two hot wires and a ground does it make a difference if the red or black hot wires are connected to L1 or L2 for a jet pump pressure switch?
No, it does not matter which hot wire (red or black) is connected to L1 or L2 for a jet pump pressure switch in a 240V setup. The important thing is to ensure that each hot wire is connected to one of the two load terminals of the pressure switch. Make sure to also connect the ground wire for safety.
Is it possible to wire a dimmer switch off another dimmer switch for a completeley different light?
No, the dimmer switch needs its own individual circuit power supply to feed the fixtures connected to it. The black of the second dimmer switch can not be connected to the red wire of the first dimmer switch. Now if you are talking about using a common "hot" to feed two dimmer switches then this can be done. The neutrals will be common also. So what you should have is two black wires connected together with the incoming "hot". Two neutrals connected together with the incoming white. The red from each dimmer is then connected to its own individual fixture load.
What is a simple wiring diagram for a light switch?
A simple wiring diagram for a light switch involves connecting the power source to the switch, and then connecting the switch to the light fixture. The power source is typically connected to the switch through a black wire, and the switch is connected to the light fixture through a white wire. A ground wire is also connected for safety.
Why would a light switch have two black wires for power and two whites caped off?
Having two black wires connected to a light switch indicates that it is a switch loop, where one black wire brings power to the switch and the other black wire carries power to the connected light fixture. The two white wires capped off are neutral wires from the power source and the light fixture, which are typically not connected to the switch.
When wiring a wall switch which color wire goes on the common terminal screws?
The common wire is typically black and goes on the black screw terminal of a wall switch. If the wire is white, it should be reidentified as a hot wire with black tape before connecting to the switch.
Where is the oil pressure switch on a 1996 gmc jimmy?
The oil pressure is located on the side of the engine block. The switch has a black plug with three wires connected to it.
How can I properly connect the 3 black wires to a light switch?
To properly connect the 3 black wires to a light switch, you should first identify which wire is the hot wire, which is the neutral wire, and which is the load wire. The hot wire should be connected to the black screw on the switch, the neutral wire should be connected to the silver screw, and the load wire should be connected to the brass screw. It is important to turn off the power before making any connections and to follow all safety precautions.
The black wire from your brake switch is not connected on an 89 jeep pioneer Cherokee where does it go?
Possibly for the optional Cruise control.
What is a black box under dash of Holden Vl commodore with switch and red light connected to brakes?
Trailer brakes.
I have Two black wires and one red wire conected to a switch. Which is hot and which is neutral?
The red wire is typically the hot wire and the black wires are neutral wires. However, it's important to verify the connections using a voltage tester to ensure correct wiring and avoid any electrical hazards.
How do you hook up one light to one switch in a basement lighting system that has all 10 lights connected to one switch?
If you have good access to the wiring this is relatively easy to do. Each of the 10 lights is connected to another in parallel in a "daisy chain" fashion. Light 1 is connected to the switch, light 2 is connected to light 1, light 3 is connected to light 2 and so forth. Let's say it is light 5 that you wish to switch separately. You can first install the new switch by either adding a new box or modifying old switch box. There are two gang switches that will fit the form factor of a single switch. TURN OFF THE POWER TO SWITCH BOX. Using the same supply input at original switch, add a new black wire to the wire nut for input to original switch and connect this to the input of new switch. Then run a new wire to light 5 and connect black wire to the output of new switch. Connect all the white wires together in switch box and separately connect all bare wires together in switch box. Now at light 5 undo the black and white wire coming from the fixture, and reconnect the wire nuts so that there is a direct connection between light 4 and light 6. Do the same for the ground if present (bare wire). You now have the fixture wires hanging free. Now connect the black wire from new switch to the fixture black wire and white to white and you are done.
Dimmer switch that has one black wire connected to the left side and two black wires connected to the right side of the switch How do you connect these wires if you want to just install a regular flip?
Check the screws next to the wires and see what color they are if they are green, black, and red then do what i say next, if not you're screwd. just connect the red/black/green wires in the holes in the flip switch and be careful not to touch the wires just the protective covering and inert them they should auto lock in there...if not just screw them in.
When connecting a 240V line with two hot wires and a ground does it make a difference if the red or black hot wires are connected to L1 or L2 for a jet pump pressure switch?
No, it does not matter which hot wire (red or black) is connected to L1 or L2 for a jet pump pressure switch in a 240V setup. The important thing is to ensure that each hot wire is connected to one of the two load terminals of the pressure switch. Make sure to also connect the ground wire for safety.
