The switch should be prior to the transformer for several reasons. First this kills power to the transformer; if the lamps were only disconnected, even with no load, transformers waste power. This use of power usually increases with age and later it may start buzzing as the core delaminates.
Do you run power to the light or switch first?
Given 14/3 is more expensive than 14/2, in most cases, I’d say run power to the switch first unless it’s substantially father away from the power source than the lights (eg: the power-supplying wire passes your lights, then you have to double back with power to the lights).
Does a switch leg come before or after the switch?
Quote from Youtube video: You were allowed to use a two wire cable for this so there's many situations out there where this is the case you only have a black and a white coming down from the light fixture to the switch.
Should you put a switch on power or ground?
Power switching will more likely result in the tripping of a breaker or fused device. Ground switching will more likely result in a latching of the load device in an energized state. There is no absolute guarantee that these results will be seen in failure cases, but at least we can sway the odds.
Can a transformer be used as a switch?
Unfortunately electrical transformers are not perfect switches because of inefficiencies. The primary and secondary windings have some impedance which is present even when the secondary is short-circuited.
Can power go to light before switch?
If power goes to the fixture before heading to the switch, you have “end-line” wiring. Only one cable enters the switch box, coming from the fixture. The white wire to the switch should be marked black to indicate that it is hot. (Ground wires are not shown.)
Can you wire a switch after a light?
Power source directly to fixture – When you want to add a switch to a light that is “hot” at the fixture, you can run a new 3 wire cable from the fixture to a box containing the new switch. The black caries the “hot” to the switch, the red carries the hot back to the fixture. Both will be “hot” when the switch is on.
How do you wire a switch at the end of a circuit?
Quote from the video:
Quote from Youtube video: So with the power turned off we run the black hot wire to the bottom terminal of the switch. Then. We run another hot wire over to the sealing box and into the light fitting.
Does hot wire go on top or bottom of light switch?
Attach the white wire from the light fixture, which is now the hot wire, to the nut at the top right of the switch. Attach the red wire from the light fixture to the nut at the top left of the switch. Connect the bare copper wire to the green nut at the bottom left of the switch.
Is a switch leg the same as a traveler?
Although the hot wire might deliver the current at the point of use or at the switching point, the switch-leg wiring is the same. A hot wire delivers current to the first switch. Two wires called travelers carry current between switches. A wire connected to the last switch in the leg carries the current to the outlet.
How does a switch transformer work?
The AC main power is filtered through a capacitor when power is switched on, allowing it to be converted from AC voltage with rectifiers to unregulated DC voltage. Using a regulator, the switch mode transformer then converts this unregulated DC voltage into regulated DC output voltage at different voltage levels.
Which type of switch is used in transformer?
Switch Mode Transformers Information. Switch mode transformers (switching transformers) are used mainly in switching power supplies and DC-DC converters. They provide a storage element for transferring energy from input to output in discrete packets as required in switching power supplies, regulators and converters.
Why are switch mode transformers more efficient?
This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies can also be substantially smaller and lighter than a linear supply because the transformer can be much smaller.
Can I draw power from a wall outlet to add a light and light switch?
Adding an electrical outlet next to an existing light switch is easy, as long as there is a neutral wire in the box.
- Step 1: Turn the power supply off to the light switch at the main electrical panel.
- Step 2: Remove the switch plate and unscrew the switch from the outlet box.
- Step 3: Pull the switch out from the box.
How do you wire a light switch and outlet in the same box?
Quote from the video:
Quote from Youtube video: And just like with the ground i want to make sure that my hook is going around the terminal in a clockwise. Direction. And then just tighten down the terminals nice and firm.
Where does live wire go in light switch?
A one way light switch has two terminals which is a common marked as COM or C. The common is for the live wire that supplies the input voltage to the switch. The other terminal is marked as L1 and is the output to the light fixture.
What happens if you wire a light switch wrong?
But here’s the catch: If you connect the circuit wires to the wrong terminals on an outlet, the outlet will still work, but the polarity will be backward. When this happens, a lamp, for example, will have its bulb socket sleeve energized rather than the little tab inside the socket.
Does switched live go to neutral?
Live = switched live (which also happens to be neutral, but nowhere on the switch or the attached instructions does the word “neutral” appear). So, you’re at home, changing a light switch (removing a dead dimmer switch and putting a normal one in its place).
Does positive and negative matter on a light switch?
The circuit works the same no matter where you put the switch. Part of the electrical code (for house wiring) says that the switch should always go between the hot conductor and the load. This is for safety.
Should switch be on positive or negative side?
There’s considerable controversy over whether it’s best to hook up the master-shutoff (“kill”) switch to the battery’s positive or negative side. NHRA rules still mandate a positive-side hookup, but most stock-car sanctioning bodies want the kill switch on the negative side.
Does it matter which way you wire a switch?
In the case of a single-pole switch, these wires are interchangeable—it doesn’t make any difference which wire is attached to which screw terminal. Inside the switch is a metal pathway that closes when the switch is in the ON position and opens to interrupt the flow of power when the switch is turned OFF.
