Messianic Post: Line Vs Load Wire

Tuesday, September 7, 2021

Line Vs Load Wire

Line is the wire going from a current source into a switch. Risk of electric shock.

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Load Wire - Generally connected to the top half of your switch.

Line vs load wire. The black or red wire going to the next outlet or light fixture is your load wire. In a circuit the main load wire the live power wire between the switch and power source is typically black and the secondary load wire is usually red. Also known as the Line wire.

Currently the circuit is installed with a 4-way switch and 2 3-way switches. A second meaning for load is the magnitude of the energy consumed by the. DIY outlet upgrade to GFI.

To answer your question further. In your question you just had the flow going the opposite way. The hot and neutral lines should be two distinct colors but the colors can vary for the different wires.

In this video I talk about the difference between the line and load on a GFCI electrical receptacle. The wire that does not cause the pen to glow red is the Load wire. Load will only be hot if the switch is closed.

If the receptacle works then the pair you chose is line. In some cases a white wire. I really dont like using analogies from plumbing but imagine a spigot and hose.

Line supplies the power hot side to the switch and the load side of the switch switched hot is delivering the current to the device being energized. On the other hand load refers to devices on the same circuit that are downstream of the one in question. The black or red coming from the electrical panel is the line wire.

The wire that causes the pen to glow red is the hot wire. For the LOAD cables black wire A yellow sticker covers the LOAD terminals. I want to install an Inovelli switch on a 4-way circuit.

Connection for the LOAD cables white wire 4. So pick one blackwhite pair at random. Its upstream of the switched devices.

Line Wire - Generally connected to the bottom half of your switch. Load is the wire going from the switch to the device. I show how to determine line and load wires using an inexpensive lightbulb tester.

However using a voltage detector I know that the power comes to one of the 3-way switches. Turn the breaker back on. Line is always hot.

If the wire is coming from the top of the switch box it is likely your load wire. Learn how to identify wires for your safety. Identifying electrical wiring properly is an important step when replacing a light fixture installing an outlet or handling other electrical work.

One set of wires will be the line or power supply. So I know which wire I would connect to Line. I am not sure how the wiring is actually laid out Im not sure exactly where the lights are connected in the curcuit.

The neutral wire complete the circuit to the power panel and provides a return path for the electrical circuit. Before continuing with the rest of the installation process make sure to turn the power breaker off. Wire colors can vary between circuits so it is best to remove or turn off power sources before touching them.

The load wire is connected to the device being installed. Leave the other blackwhite pair unconnected but isolated. Do not remove the sticker at this time.

Connect it to the line side of your GFCI. Connection for bare copper or green wire LINE White terminal Silver. A GFCI outlet properly installed will protect all the outlets on the load side.

The differences are pretty straightforward but I made. In some cases line wires are marked with line pwr or a lightning bolt symbol. When referring to an electric device that can be connected to another one such as a receptacle line refers to the wires feeding it from the panel which is upstream from the device in terms of the flow of electricity.

If it doesnt work then the pair you chose is load and thus you need to move that pair to the load connections. B2 and B5 are considered line and B1 and B6 are considered load. To determine the line vs load wires you need to take note of how everything is connected and write it down then disconnect the wires and use a volt meter to see which black wires have power.

Follows is a brief intro. In this case - lights. Connection for the LINE cables white wire LOAD Silver.

A yellow and blue striped wire may also be used for power in a circuit but only in applications that dont require the heavy-duty. The line wire is the one that supplies voltage to the devices from the power line circuit breaker. The other set will be the load which carries power to additional outlets on the same circuit.

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