Jul 13, 2022 · Connect the Hot Wires. Connect each hot circuit wire to one of the terminals on the new 240-volt circuit breaker. Depending on how the circuit has been installed, these might be two black wires, a black and a red wire, or a black wire plus a white wire marked with black tape to identify it as a hot wire. Make sure to insert the wires fully into ... DLane December 2, 2021, 9:46pm 2. @Bob78 - one of those wires will be the common wire. There are two types of solenoids out there DC and AC. Rachio only works with AC (24 VAC) solenoids, one wire carries the current and the other is the common. The common wire runs to every solenoid, that is why it is called common.Oct 26, 2022 · At the second device, the line is the power source coming in from the first device; the load is the wire going out to the third device on the circuit, and so on. The same meaning can apply to the device itself. The line side of an outlet is where you connect the incoming source power. The load side is where the power leaves the device (or ... The protective ground must be bare, green or green-yellow striped. Hot (active) wires may be any other colors except these. However, common practice (per local electrical inspectors) is for the first hot (live or active) wire to be black and the second hot to be red. The recommendations in Table below are by Wiles.May 23, 2022 · A wire is typically assigned a color depending on its function. This makes repairs easier because it helps the mechanic identify an individual wire's function from a group of wires in a wiring harness. However, there's a common misconception that all wire colors are standardized and that each color corresponds to a specific function. The most common sizes you’ll find in residential work are 14-gauge and 12-gauge. Larger appliances such as electric stoves, electric water heaters, electric dryers and central air units will often use 10-, 8- or even 6-gauge wire. I f you’re adding an outlet, you need to use wire that’s the same gauge as the existing wiring.Complete the Installation. Putting the dimmer switch back into the electrical box may be difficult due to the mass of wires inside the box and the dimmer switch's size. Carefully fold the wires and gently tuck them into the box. They will need to be pushed as far back as possible to make room for the dimmer body.Aug 17, 2019 · The term common is applied to the conductor that is used in any configuration of the circuit. It is easy to confuse common with the neutral wire, and in many cases this is true. A ceiling fan ... An electrical wire can be the stranded type or a solid form. Every wire except the ground wire is coated with a non-conductive coating of insulated material. Electrical wiring is rated in gauge for its size and amp rating. The electrical wire can come in rolls or on spools. Lengths of wire vary from standard cuts of 50, 100, 250, 500 and 1,000 ...Common/Line Wire. This wire carries power into the circuit from the main service panel; this is the source of power for your light and will always be energized, regardless of how the switches are configured. This wire will be connected to the common screw on one of your three-way switches. Traveler WiresMar 10, 2022 · The dark-colored terminal is the common terminal and brings power from the source to the light fixture. As with single-pole switches, neutral wires do not connect to three-way switches. When replacing a three-way switch, the wire connected to the common terminal on the old switch must be connected to the common terminal on the new switch. If you’re lacking a C wire and have at least four wires at your thermostat to work with (refer to this article if you only have two wires), you’ll want to install the Power Extender Kit (PEK). The PEK gets installed at your furnace control board and is wired in with your existing thermostat wires to create a C. Installation is quite easy ...Add C wire for Thermostat to Goodman furnace. I have read most of the posts here and have a specific question about my install. In the picture you can see the 3 blue wires coming off the 24v side of the transformer. One goes to the side and than another blue wire is connected to the metal and goes to the ac unit outside.Sep 23, 2022 · To wire the new switch, connect the labeled common wire to the COM terminal (usually bronze or dark-colored) on the switch. Connect each of the other two wires to one of the light-colored traveler terminals. Lastly, connect the bare or green ground wire to the green screw. The Spruce / Kevin Norris. Dec 4, 2019 · A C-wire, or a common wire, runs from your low voltage heating system (24v) and carries continuous power to your thermostat. In today’s electric market, most newer heating and cooling systems have C-wires, which guarantees compatibility for the installation of all smart thermostats. The correct symbol for high current return (common) is this one. often called “chassis earth” and it is a simple thick wire or the metal chassis that the circuit is mounted. This point used for measurements as common. You can imagine a dual power supply. Another type of return is the “floating return” or the optional How to tell if the B wire is the C or common wire. Most of the time, the wire labeled B goes into the O/B connector on your ecobee thermostat and is used to control the heat pump's reversing valve, which switches between heating and cooling modes. However, on some thermostats, the wire labeled B is the Common (C) wire.2. Since in your case, one side of the transformer is grounded. You can simply use a fork or ring terminal, to connect the C wire to the chassis. Though it appears there's already a wire that's attached to ground, and comes right over near the thermostat wiring. I'd just put my C wire in with the other two wires, in that twist-on wire connector ... 2 Answers. The solid/dashed lines on wires like the ones pictured in your question are used to indicate polarity e.g. for the "wall wart" power supplies. Usually * the wire with the white stripe or the dashed lines carries the "positive" (+) end, while the other, unmarked wire carries the "negative" (-) end. It doesn't matter if it is striped ... Nov 13, 2018 · The real fix: get a C-wire or install an adapter if you want a Nest. Basically, you have two options if you want to ensure your Nest installation is solid: Run new wires between your furnace and your thermostat (hire a pro or DIY with a new spool of thermostat wire) Grab a Venstar Add-a-Wire, which adds a 5th wire to an existing 4-wire setup. 90% of homeowners wire outlets wrong, learn how to do it right & AVOID these 3 COMMON ELECTRIC MISTAKES & learn an EASIER way to wire up your outlets with BE...If your thermostat has power related issues, like the battery draining too quickly or Wi-Fi constantly disconnecting, you can typically fix them by connecting a common wire (C wire) or by installing the Nest Power Connector. Either one will provide a stable power source for your Nest thermostat when your system can’t deliver enough consistent ... Feb 10, 2015 · Add C wire for Thermostat to Goodman furnace. I have read most of the posts here and have a specific question about my install. In the picture you can see the 3 blue wires coming off the 24v side of the transformer. One goes to the side and than another blue wire is connected to the metal and goes to the ac unit outside. beancount
Dec 9, 2022 · The C-Wire Power Adapter makes Honeywell Home smart thermostats compatible with most homes that don't have a common wire. We'd be happy to check if this product is compatible with your system. When you have a moment, contact us at 1-800-468-1502, or through Facebook and Twitter under Honeywell Home. -Jerry. Mar 10, 2022 · The dark-colored terminal is the common terminal and brings power from the source to the light fixture. As with single-pole switches, neutral wires do not connect to three-way switches. When replacing a three-way switch, the wire connected to the common terminal on the old switch must be connected to the common terminal on the new switch. 2. Since in your case, one side of the transformer is grounded. You can simply use a fork or ring terminal, to connect the C wire to the chassis. Though it appears there's already a wire that's attached to ground, and comes right over near the thermostat wiring. I'd just put my C wire in with the other two wires, in that twist-on wire connector ...To make this fit a more common wiring style, I'd probably rewire it a bit. So that the red wires going to the thermostat, connected the transformer and the R terminals. And the white wires connected from the zone valves to the W terminals on the thermostats.Understanding 120/240V Wiring Color Code. Homes in North America are supplied with a 120/240V single-phase electrical service. The incoming 240V power is split into two legs. Each leg can provide 120V hot-to-neutral, and the two legs together will supply 240V, which is used to supply heavy loads such as air conditioning compressors and cookstoves.Red or orange wires are often used to provide the secondary phase voltage in a 220-volt application. Always assume that a red or orange wire (in addition to the black wire, which provides the ...May 23, 2022 · A wire is typically assigned a color depending on its function. This makes repairs easier because it helps the mechanic identify an individual wire's function from a group of wires in a wiring harness. However, there's a common misconception that all wire colors are standardized and that each color corresponds to a specific function. 220 and 230 Volt Wiring FAQ. Wiring residential homes with 240 volts is a necessity, for powering some heating and cooling equipment as well as some large appliances. The 220-volt circuits as they were known prior to the 1960s are now commonly known as 240-volt circuits and 110-volt circuits are now 120-volt circuits.How to tell if the B wire is the C or common wire. Most of the time, the wire labeled B goes into the O/B connector on your ecobee thermostat and is used to control the heat pump's reversing valve, which switches between heating and cooling modes. However, on some thermostats, the wire labeled B is the Common (C) wire. G: This wire controls the blower fan, which is responsible for pushing the warm or cool air through all the vents in your house. It is not a ground wire! C: This stands for the “common” wire in an HVAC system, and it provides power to the thermostat. Some systems don’t provide this, and it’s not necessarily required by every thermostat ...What is a C wire or common wire? If you’re considering a smart thermostat, a C wire (common wire) may be required. We’re here to guide you through the process to determine if a thermostat C wire is required for smart thermostat installation. Step 5: Nest Common Wire Installation - HVAC Startup. Now that you have all the wiring installed replace the cover on the HVAC system and install the Nest Thermostat on it’s base. When complete turn the Power back on at the HVAC system. Follow the setup menu on the Nest Thermostat and click OK to confirm the common wire is connected.coach net
Aug 28, 2023 · Thermostats use 24 volts AC from a transformer to control a furnace. The transformer steps down 120 volts to the 24 volts the thermostat needs, and sends out the 24 volts on two wires. The two 24 volt wires go to the R terminal and C terminal inside the thermostat. R is the hot side, while C is the common side of the transformer. Green – The green wire connects to the fan. Orange – This wire connects to your heat pump (if you have one). Red – Now, there can be two separate wires for this. One is for cool and the other is for heat, hence the abbreviation “RH” and “RC”. Blue – This is your common or “C” wire. You may also have up to two black wires as ... Feb 12, 2021 · Rounding out the electrical wire color code are orange, brown, pink and violet. In U.S. homes, orange is most commonly used like a red wire, particularly in a 240-volt circuit where two hot wires are needed. You might see orange wires in the fire alarm circuit as well. Pink and violet are less prevalent but can be used as travelers or switch ... A thermostat Common wire, when necessary and when is then provided to a Nest thermostat, connects to the C terminal only. The Nest Thermostat does not use jumper wires, it will automatically jump terminals for you. Do not connect jumper wires to the Nest Thermostat. See details at NEST THERMOSTAT INSTALLATION & WIRING. On 2020-01-02 - by (mod) -It means the wire connected to the common terminal leads to a load of a hot wire from the mainboard. You can identify the common terminal as a single dark-colored screw. Meanwhile, the green color is the ground screw. While the color and arrangement of the screws may depend on the switch manufacturer, most 3-way switches have such colors. Branch circuit electrical wire sizes such as the #14 copper electrical wire shown just below are included in the tables on this page where we give wire sizes for circuits from 15A to 50A. Above is a close-up photo of a #14 copper wire against a millimeter scale. The divisions on the scale of my metal ruler each represent 1 mm. Mar 28, 2017 · Technology Editor Bill Wong takes some unwanted time to replace his Nest thermostat after the heating system went south. Connect the light's hot wire to the switch's common terminal. One note; if you connect the black wire from the traveler to the same side of the second switch that you connected the black traveler wire to on the first switch, the switches must be set opposite each other (one up and one down) for the light to be off.If your thermostat wires connect to terminals marked R and W, installation is as simple as connecting a third wire to the common on the furnace or boiler's low-voltage Common point. Depending on your furnace, this may be either a terminal marked "C" or "Com 24V", or you may need to locate where the common can be connected to.friendlier
Oct 24, 2022 · The black wire is called the common wire. Before disconnecting it, place a piece of electrical tape on it so it’s easy to remember which is the common wire later. STEP 5: Open the second switch ... Your thermostat is connected to a system that requires a C or common wire, but that wire isn’t connected. Some systems, including heat-only, cool-only, zone-controlled, and heat pump systems, require a C wire or Nest Power Connector. Go to g.co/nest/cwire for details.What is a C wire or common wire? If you’re considering a smart thermostat, a C wire (common wire) may be required. We’re here to guide you through the process to determine if a thermostat C wire is required for smart thermostat installation.This 3-way light switch wiring diagram shows how to wire the switch and the light when power is coming to the light fixture. In this diagram, power enters the fixture box. The black hot wire connects to the far right switch’s common terminal. Red and blue wires link the traveler terminals of both switches. The red wire, which is connected to ...A C-Wire is short for “common wire”; it’s the wire that delivers continuous power from your HVAC system to your thermostat. Pretty much all the best smart thermostats or Wi-Fi-enabled ...Oct 25, 2022 · Attach 1 lead to each wire. Clip the small alligator clip on the red lead to the end of 1 wire and the clip on the black lead to the end of the other. Look at the reading on the screen—you'll see a number and either a + or – sign. [8] The number is the voltage reading. The + indicates positive current. ITS PURPOSE. The purpose of the sprinkler wire is to deliver electricity from the timer to the automatic valves, which allows the valves to open. Every valve has a solenoid with two wires; one common wire, and one zone wire. The common wire is usually white but can be any color as long as it’s hooked to the common slot in the sprinkler timer.To help you assess the state of your own electrical system, we’ve asked Gallant to identify the 10 most common wiring problems he sees, the dangers they pose, and his recommended solutions. Remember: Anytime you work with wiring, be sure to turn off the circuit at the main breaker panel. Common Electrical Problems 1. OverlampingGreen – The green wire connects to the fan. Orange – This wire connects to your heat pump (if you have one). Red – Now, there can be two separate wires for this. One is for cool and the other is for heat, hence the abbreviation “RH” and “RC”. Blue – This is your common or “C” wire. You may also have up to two black wires as ... Typical electrical wire for home use comes in an insulated sleeve and consists of three wires. A black wire carries the electrical current and is therefore commonly known as the “hot” wire. There is a white wire that is the “neutral,” and, finally, a bare copper wire that is the ground wire. When electrical wires are joined together the ...Most wire will be marked “CU” for copper, the most common conductor of residential electricity. Because electricity travels on the outside of copper wire, these wires are insulated to protect against fire and shock. Aluminum wire is more conductive than copper wire, but it also degrades faster. The proper wiring for a 3-way switch depends on where the switch falls in the circuit. Remember that 3-way switches always appear in pairs. The two switches can come before or after the light fixture in the circuit, or you can have one switch on each side, with the fixture in the middle. The most important wire to get right is the one connected ...To help you assess the state of your own electrical system, we’ve asked Gallant to identify the 10 most common wiring problems he sees, the dangers they pose, and his recommended solutions. Remember: Anytime you work with wiring, be sure to turn off the circuit at the main breaker panel. Common Electrical Problems 1. Overlampingjohn davis chandler
What is a C wire or common wire? If you’re considering a smart thermostat, a C wire (common wire) may be required. We’re here to guide you through the process to determine if a thermostat C wire is required for smart thermostat installation.The grounded (neutral) conductor is connected to the center of the coil (center tap), which is why it provides half the voltage. Therefore, if a device requires only 240V, only two ungrounded (hot) conductors are required to supply the device. If a device runs on 120V, one ungrounded (hot) conductor and one grounded (neutral) conductor are needed. An electrical wire can be the stranded type or a solid form. Every wire except the ground wire is coated with a non-conductive coating of insulated material. Electrical wiring is rated in gauge for its size and amp rating. The electrical wire can come in rolls or on spools. Lengths of wire vary from standard cuts of 50, 100, 250, 500 and 1,000 ...A thermostat Common wire, when necessary and when is then provided to a Nest thermostat, connects to the C terminal only. The Nest Thermostat does not use jumper wires, it will automatically jump terminals for you. Do not connect jumper wires to the Nest Thermostat. See details at NEST THERMOSTAT INSTALLATION & WIRING. On 2020-01-02 - by (mod) - Nov 23, 2022 · An electrical wire can be the stranded type or a solid form. Every wire except the ground wire is coated with a non-conductive coating of insulated material. Electrical wiring is rated in gauge for its size and amp rating. The electrical wire can come in rolls or on spools. Lengths of wire vary from standard cuts of 50, 100, 250, 500 and 1,000 ... The common wire, sometimes referred to as the c-wire, is what’s responsible for delivering constant power to your thermostat. For programmable and smart thermostats, c-wires are required for setting a heating or cooling schedule. While some units can run without a c-wire, most brands suggest having one for optimal function. Oct 26, 2022 · At the second device, the line is the power source coming in from the first device; the load is the wire going out to the third device on the circuit, and so on. The same meaning can apply to the device itself. The line side of an outlet is where you connect the incoming source power. The load side is where the power leaves the device (or ... Jun 9, 2023 · Connect the C wire to the furnace: Strip about 1/2 inch (1.27 cm) of insulation from the ends of the C wire. Insert the exposed wire into the C terminal on the furnace. Depending on the type of terminal, you may need to use a screwdriver to secure the wire or push it into a clamp. Secure the connection: Once the C wire is in place, make sure it ... To help you assess the state of your own electrical system, we’ve asked Gallant to identify the 10 most common wiring problems he sees, the dangers they pose, and his recommended solutions. Remember: Anytime you work with wiring, be sure to turn off the circuit at the main breaker panel. Common Electrical Problems 1. Overlamping 220 and 230 Volt Wiring FAQ. Wiring residential homes with 240 volts is a necessity, for powering some heating and cooling equipment as well as some large appliances. The 220-volt circuits as they were known prior to the 1960s are now commonly known as 240-volt circuits and 110-volt circuits are now 120-volt circuits.The grounded (neutral) conductor is connected to the center of the coil (center tap), which is why it provides half the voltage. Therefore, if a device requires only 240V, only two ungrounded (hot) conductors are required to supply the device. If a device runs on 120V, one ungrounded (hot) conductor and one grounded (neutral) conductor are needed.A thermostat Common wire, when necessary and when is then provided to a Nest thermostat, connects to the C terminal only. The Nest Thermostat does not use jumper wires, it will automatically jump terminals for you. Do not connect jumper wires to the Nest Thermostat. See details at NEST THERMOSTAT INSTALLATION & WIRING. On 2020-01-02 - by (mod) - 2. Since in your case, one side of the transformer is grounded. You can simply use a fork or ring terminal, to connect the C wire to the chassis. Though it appears there's already a wire that's attached to ground, and comes right over near the thermostat wiring. I'd just put my C wire in with the other two wires, in that twist-on wire connector ...The black wire is called the common wire. Before disconnecting it, place a piece of electrical tape on it so it’s easy to remember which is the common wire later. STEP 5: Open the second switch ...Remove the wire from the G terminal, and connect it to the C terminal. Using a short piece of 18 AWG wire, make a jumper and connect it between the Y and G terminals (this is only required if you have both heat and central air). Replace the access panel. Remove the thermostat from the wall to gain access to the wiring. western wyoming community collegeThe common wire is normally the white wire, at least in the United States, and is often called the neutral wire. It’s also called common because all circuits in the house typically have the white wires tied together, which means every circuit has that wire in common. Why a common wire? What is the common wire in electrical wiring?Mar 24, 2023 · The C wire (common wire) powers a smart thermostat by providing a constant flow of 24 VAC (volts AC). The term "constant flow" is the key here, because the C wire isn't the source of power. The R wires are the actual source of power, but they are not continuous, hence the use of the C wire. However, not all home wiring consists of a C wire. These high-voltage connections are quite common in many manufacturing and other industrial areas. Due to the serious potential for deadly electrocution or other issues, getting these color codes right is essential. 277/480. Phase 1 wiring should be brown. Phase 2 wiring should be orange. Phase 3 wiring should be yellow.What wire goes to common on light switch? The faceplate of a single, one-way switch has two terminals: “L1” is the terminal to which the neutral core wire is attached – the blue wire (traditionally black, before the change). “COM” or “Common” is the terminal to which the live core wire is attached – this is the brown wire ...Remove the wire from the G terminal, and connect it to the C terminal. Using a short piece of 18 AWG wire, make a jumper and connect it between the Y and G terminals (this is only required if you have both heat and central air). Replace the access panel. Remove the thermostat from the wall to gain access to the wiring. Step 5: Nest Common Wire Installation - HVAC Startup. Now that you have all the wiring installed replace the cover on the HVAC system and install the Nest Thermostat on it’s base. When complete turn the Power back on at the HVAC system. Follow the setup menu on the Nest Thermostat and click OK to confirm the common wire is connected.Mar 10, 2022 · The dark-colored terminal is the common terminal and brings power from the source to the light fixture. As with single-pole switches, neutral wires do not connect to three-way switches. When replacing a three-way switch, the wire connected to the common terminal on the old switch must be connected to the common terminal on the new switch. What wire goes to common on light switch? The faceplate of a single, one-way switch has two terminals: “L1” is the terminal to which the neutral core wire is attached – the blue wire (traditionally black, before the change). “COM” or “Common” is the terminal to which the live core wire is attached – this is the brown wire ...Add C wire for Thermostat to Goodman furnace. I have read most of the posts here and have a specific question about my install. In the picture you can see the 3 blue wires coming off the 24v side of the transformer. One goes to the side and than another blue wire is connected to the metal and goes to the ac unit outside.Oct 1, 2022 · Identifying a common wire isn’t so easy, so we simplified it for you: Unscrew the cover of the thermostat, and take a hard look at the wires inside. Note the number of wires and their colors. If you live in the U.S., as per electrical codes, a common wire should be either white or gray. White common ... Typical electrical wire for home use comes in an insulated sleeve and consists of three wires. A black wire carries the electrical current and is therefore commonly known as the “hot” wire. There is a white wire that is the “neutral,” and, finally, a bare copper wire that is the ground wire. When electrical wires are joined together the ... If your thermostat has power related issues, like the battery draining too quickly or Wi-Fi constantly disconnecting, you can typically fix them by connecting a common wire (C wire) or by installing the Nest Power Connector. Either one will provide a stable power source for your Nest thermostat when your system can’t deliver enough consistent ... cerra
Sep 7, 2023 · Budget pick. If you don't mind a bit of a dated look and lack of a 24/7 light-up display, then Emerson's Sensi smart thermostat is your best budget pick. It only requires a C wire for heat- and ... There aren’t any standards for wire colors. Here are common uses and preferred colors for these wires: R terminal will use the red wire. (24 v AC from the control board) Rc: Power for cooling Rh: Power for heating C terminal will use the blue or black wire (Common wire, enables the continuous flow of 24 v AC from the Red wire.)A common wire is either a connecting wire or a type of neutral wiring, depending on the electrical circuit. When it works as a connecting wire, the wire connects at least two wires of a circuit together. Standard wiring design in U.S. homes involves a neutral wire at the ground potential and two hot wires of 120 volts each.How to tell if the B wire is the C or common wire. Most of the time, the wire labeled B goes into the O/B connector on your ecobee thermostat and is used to control the heat pump's reversing valve, which switches between heating and cooling modes. However, on some thermostats, the wire labeled B is the Common (C) wire.Aug 29, 2022 · If you have a C wire, place it into the C terminal on your wall plate. C wire adapters are available here. Let’s look at the G wire. This wire goes to the G terminal on your new thermostat. Of the Y, Y1, and Y2 wires, Y or Y1 go to the Y terminal and Y2 to the Y2 terminal. The O/B wire can have many configurations. Connect the light's hot wire to the switch's common terminal. One note; if you connect the black wire from the traveler to the same side of the second switch that you connected the black traveler wire to on the first switch, the switches must be set opposite each other (one up and one down) for the light to be off.Dec 4, 2019 · A C-wire, or a common wire, runs from your low voltage heating system (24v) and carries continuous power to your thermostat. In today’s electric market, most newer heating and cooling systems have C-wires, which guarantees compatibility for the installation of all smart thermostats. The proper wiring for a 3-way switch depends on where the switch falls in the circuit. Remember that 3-way switches always appear in pairs. The two switches can come before or after the light fixture in the circuit, or you can have one switch on each side, with the fixture in the middle. The most important wire to get right is the one connected ...Common Wire Gauges The common U.S. wire gauges (called AWG gauges) refer to sizes of copper wire. The resistivity of copper at 20 C is about . This table uses this value of resistivity, but it is known to vary by a few percent based on purity and process of manufacture.How do I wire and install my thermostat? The Sensi app provides all the installation instructions for wiring your new thermostat. Download the Sensi app on your smart phone or tablet. Create an account or sign in. Tap the + sign. Tap your Sensi product. Tap " New Installation ". Tap “ Not Mounted ”. Follow the in-app setup and wiring ...The grounded (neutral) conductor is connected to the center of the coil (center tap), which is why it provides half the voltage. Therefore, if a device requires only 240V, only two ungrounded (hot) conductors are required to supply the device. If a device runs on 120V, one ungrounded (hot) conductor and one grounded (neutral) conductor are needed. Remove the wire from the G terminal, and connect it to the C terminal. Using a short piece of 18 AWG wire, make a jumper and connect it between the Y and G terminals (this is only required if you have both heat and central air). Replace the access panel. Remove the thermostat from the wall to gain access to the wiring.central willamette credit union
DLane December 2, 2021, 9:46pm 2. @Bob78 - one of those wires will be the common wire. There are two types of solenoids out there DC and AC. Rachio only works with AC (24 VAC) solenoids, one wire carries the current and the other is the common. The common wire runs to every solenoid, that is why it is called common.G: This wire controls the blower fan, which is responsible for pushing the warm or cool air through all the vents in your house. It is not a ground wire! C: This stands for the “common” wire in an HVAC system, and it provides power to the thermostat. Some systems don’t provide this, and it’s not necessarily required by every thermostat ...The Common Maker adds a common C connection to a thermostat cable with 2 or more wires. A common connection allows the thermostat to operate without batteries or power stealing circuits. Compatible with all major name brand Wi-Fi thermostats and HVAC equipment, including furnaces, air handlers, zone valves, zone controllers, millivolt systems ...About this item. No c-wire, no problem – this common wire kit eliminates the need to run a new wire throughout your home. Easy solution when running an additional wire is not an option. Easy installation process – refer to our videos and installation guide for step-by-step instructions. Does not work with 2-wire systems.At the second device, the line is the power source coming in from the first device; the load is the wire going out to the third device on the circuit, and so on. The same meaning can apply to the device itself. The line side of an outlet is where you connect the incoming source power. The load side is where the power leaves the device (or ...