single pole vs double pole

No. Both are types of line voltage thermostats, which typically control radiant, convection or resistance heaters. Whether you're looking for advice on furnishing your living room or the next outdoor DIY project, we've got you covered. There is definitely a difference between Single Pole light switches and 3-Way light switches. Wiring a double pole switch as a single pole is fairly easy since only one side is used rather than both. When replacing switches, an equipment ground isn’t required. When spec’ing a truck, selecting between a single pole system and a dual-pole system can be a larger decision than people realize. Single-pole breakers: Provide 120 volts, 15-20 amps and have one hot wire and one neutral wire. Some appliances, however, need a higher voltage, 240-volts, as they require much more energy to operate. The ones I have used are off in the middle. Mixing up your wires means a faulty switch and can be dangerous. When it comes to neutral wires, neither the single or double pole has the terminals for them. A single-pole t-stat is the same thing without the "on/off" micro switch. Haven't read all the other replies dude but double pole completely isolates the load from the circuit whereas single pole is more of a functional thing. There’s a switch in the thermostat that completely shuts off power to the heater. This is a case of on-off vs isolation switching. To know more about single and double pole switches, and the difference between them, check out our in-depth guide below. Every type of switch has two main components that control the circuit: a switch pole and a switch throw. Circuit breakers have replaced the glass fuses of years ago, as they can be reset once they are tripped and the cause of the excess current draw has been removed or repaired. It can either be a DPST (double pole, single throw) switch or a DPDT (double pole, double throw) switch. This type of switch operates a circuit with two hot wires. WARNING: Make sure that you always ground your switches for safety reasons. A "hot" wire, that is, the one that supplies the power, is fed through a circuit breaker before it goes through a building's wiring to wall outlets and appliances. socketboy, 30 Dec 2004 #1. They operate one circuit and offer a standard on and off function. Circuit breakers come in several styles, including the standard single-pole breakers that serve 120-volt household circuits and double-pole breakers that take up two slots in a breaker box and serve 240-volt appliances. These household appliances include electric ranges (ovens), dryers, water heaters, central air conditioning systems and electric baseboard heat. In terms of safety, both switches require ground screws that must be attached to a circuit ground. Switches are used for operating lights, fans, garbage disposal, and even large electrical mechanisms. Its just an added belt and braces point of isolation. And on in either top or bottom. SWX 200 Series. In essence, wiring a single pole and double pole switch are similar. A circuit breaker that is connected to a 110-volt circuit is called a "single pole" breaker. A double pole breaker is primarily used with … In that case, a black tape should be wrapped around the white wire indicating that the neutral operates as a hot wire. A single-throw switch features a pair of contacts that can be close or open. Although double pole switches aka four-way switches are primarily used in industrial settings, they’re also found in residential wiring systems. Keen holds a degree in electronics, was chief engineer for two radio stations and taught computer science at Stockton State College. In this case, it can be left as is. In this setup, the switches connect with the box through the grounding screws. A circuit breaker controls one "hot" leg of a circuit. No batteries, no “power-stealing”. Generally, the current rating is labeled and it should be equal or higher than the current draw of the device. For example, if you need a switch to operate a light or fan, a single switch works best. Most homes and small businesses are connected to a local utility company's power grid, which supplies two AC (alternating current) voltages, namely 120-volt and 240-volt supplies. Many residential and light commercial air conditioning systems, as well as some packaged open- and closed-loop water-source heat pump systems, use a single-pole contactor along with dual-run capacitors (Figure 1). Double Pole Switches. Air Conditioning and Cooling Systems - Single pole to double pole contactor exchange - Hi, Can someone help confirm the wire transfer from a single pole contactor to a double pole… However, you have to keep in mind that the red wires go on one side of the switch and the black wires on the other. I'm just adding a couple of new double switched sockets and have the choice of either single pole or double pole. There are many reasons why your carpet may have wrinkles or ripples in it. Ceiling Sensors. When the switch is toggled, the current is cut to both circuits at the same time. One of the most common questions around switches is the difference between a single and double pole switch. (both poles) 1; 2; Next. So what exactly is the difference between a single and double pole thermostat? For heavy-duty uses like power tools and water heaters, you should use a double pole switch. A double-pole switch controls two separate circuits. The contactor arrangement can be single pole, double pole, or triple pole, depending on the phase and application. Also, when using a metal box, wrap a piece of electrical tape around the screws to protect against shorts and arcs. Single pole switches are common, simple light switches. The basic types of switches are  Single Pole, Double Throw (SPDT), Double Pole, Double Throw (DPDT), Single Pole, Single Throw (SPST), and Double Pole, Single Throw (DPST). A double-pole switch is like two separate single-pole switches that are mechanically operated by the same lever, knob, or button. As mentioned, double pole wiring is used for heavy-load appliances like showers and cookers. Essentially, a switch is a binary mechanism: it’s either completely closed (ON) or open (OFF). 278B series are double action stations with terminals for field wiring connections. Also, the switch controls the device, fixture, or mechanism from a single location. Circuit breakers are used as safety devices to prevent an electrical circuit from drawing more current than it's designed to use, preventing possible fire hazards from overheated wiring and electrical appliances. As a rule of thumb, neutral wires (usually in white) aren’t connected to the switch. What’s the Advantage of Double Pole Over Single-Pole? Most electrical outlets in a home deliver 120-volts to lamps, refrigerators, TVs, radios, computers, VCRs and DVD players, clocks, hair dryers, washing machines, toasters, microwave ovens, vacuum cleaners, cell phone charges, blenders and most all appliances you would normally purchase at a department store. One pair of black and red wire connects to the power supply’s switch. For older homes, it’s not unheard of to find switches with no grounding. They are normally installed in situations where the breaker box is alr… This sensor’s chase nipple attachment makes surface mounting to a finished ceiling simple and secure. One of the terminals is for the incoming power source wire while the other terminal accommodates the outgoing hot wire. Single Pole No "Off" Feature: Two electrical wires Wide View Sensors. However, not all switches are the same. For over 30 years he has written books and magazine articles for such publishers as McGraw-Hill. Double-pole breakers: Provide 240 volts, 20-60 amps and have two hot wires that share one neutral wire. On the flip side, a double pole switch features two sets of brass terminals and a ground screw. The Key Differences Between Single-Pole and Double-Pole Switches. It only has one pair of terminals which is why it’s called a single-pole switch. These switches make it possible to safely isolate appliances. Electrical switches are used to interrupt the electrical flow in a circuit. up and down the stairs), use double pole wiring. We are a team of homeowners and home improvement enthusiasts who enjoy sharing decorating, gardening, home improvement, and housekeeping tips with other homeowners! This type of switch is used to operate lights, fans, or any other device from a single location. Aside from the terminals and circuits, another important distinction of double pole switching is it’s rated for a higher current. A "neutral" or "return" line is connected to appliances and outlet receptacles to complete the circuit. Single Pole vs. In higher ratings, a double pole switch is ideal because it has more room for thicker wires. Double pole switches are more common in industrial settings or factories, however they can be … Discussion Starter • #1 • Oct 24, 2008. This enables you to attach the switch to two pairs of power sources from a 240-volt circuit. In the U.S., we have a way of supplying two poles with a higher voltage (240V). When a switch is wired to a 120-volt circuit, its purpose is to interrupt a single hot wire. As you can see, the main difference between a single-pole switch and a double switch is the number of terminals and controlled circuits. Typical values for 120-volt circuit are 15 amps, 20 amps and on up to 50 amps. SPDT vs. DPDT “SPDT” stands for “single pole double throw,” while “DPDT” stands for “double pole double throw.” Both terms are varieties of switches. Identifying a Single Pole Thermostat and Double Pole Thermostat. The question is why or when should I use a double pole switched socket rather than a single pole one? Similar to the single-pole switch, a double pole switch comes with an on/off labeling. A special kind of circuit breaker is the tandem breaker, which is designed to allow two 120-volt circuits to be fit into a single slot in the circuit breaker box. Here are some things to consider when choosing the right switch. Kids are attracted to all sorts of objects, but mostly those that are glittery, shiny, bright, and colorful. Hunker may earn compensation through affiliate links in this story. Neutral wires are spliced together in the switch box to completely bypass the switch. Sockets & Switches In many decoration places, the selection and installation of switches and sockets is also one of the important factors that determine the decoration style, but people are easily overlooked … This cost saving could drastically effect the product price, however I do not want to compromise on quality & safety of the product. A single pole breaker is typically used with 120-volt circuits, 15-20 amps. There are many different types of switches and as mentioned before, we’ll discuss the single and double pole switch, and their key differences. How to Get Wrinkles Out of Carpet Without A Stretcher. If you’re looking to turn on or off a demanding electrical device, a double pole switch is required. The other outgoing pair of wires feed the device. Well, single-pole breakers and double-pole breakers differ in the voltage and amperage they provide as well as how they are wired. Furthermore, for power tools with heavy amperage and a metal body, it’s safer to use double pole switches. Double pole switches are generally used to control 240V circuits and operate higher demand appliances and motors. The range of battery switches we offer includes single and double pole master battery isolators through to change over battery switches with alternator disconnect and key lock features. No. The first, a single pole breaker and the second, a double pole breaker. In cases like this, a double pole switch is needed so the machine isn’t left energized at the other voltages. Physically, single-pole and double-pole circuit breakers have obvious differences. Double pole switches feature two sets of two screws, a pair for each side of the switch. In a typical double-pole T-stat there are two micro switches. Switches are used on anything that operates using electricity. A … Essentially, a double pole is just two single switches together and can be controlled in two different locations. Folks, Doing a remodel for a customer and ran into a new situation. On the other hand, if you want to operate a device at two locations, you need a double pole switch. The single-pole switch is the general-purpose workhorse of switches. Light switches are grounded to add another layer of protection against shocks, electrocution, and fire. The “poles” are the separate circuits that are operated by a switch. 1 of 2 Go to page. Yes, you can! Joined: 3 Jan 2003 Messages: 23,324 Thanks Received: 30 Overall, for the most standard applications, you’ll be fine with using a single-pole switch. Electricians design the wiring in a building so that a preset maximum safe current is known for each circuit. 279B series are double action stations with six inch (150mm) wire leads for field wiring connections. A double pole switch is referred as a double pole, single throw switch. The Cat. The outgoing hot wire attaches to the other end of the terminal. Under the hood, single-pole switches come with two brass-colored screw terminals that connect to the power source wires. A single circuit may consist of several wall outlets. Both a single pole thermostat and double pole thermostat are line voltage thermostats, but a single pole and a double pole typically refer to the true off setting. The terms poles and throws refer to switch contact variations. "Double pole" circuit breakers are used in this case, which consist of two single circuit breakers whose trip handles are physically tied together. The switch only controls the flow of the current in one direction. A circuit breaker controls one "hot" leg of a circuit. 2 Posts . Every electrical outlet in a home is connected to a wiring system that gets its power delivered through a circuit breaker. Relays are electrically actioned electromechanical switches. A 2 wire T-STAT typically has single pole control and a low setting whereas a 4 Wire T-Stat is typically a double pole control that can be turned off. Double pole stats have a true off setting. A double pole switch, on the other hand, is essentially a switch that allows or disallows current flow between two distinct lines or circuits at the same time. It’s just the combination of two SPST switches that are controlled simultaneously by one mechanism. One is temperature controlled, the other is just an on-off switch which only opens when the t-stat is turned all the way down to "off". Single Pole, Dual Tech., Manual On, White: Related Products. A double pole switch is usually rated at 30 amps, twice than a standard switch rated at 15-20 amps. When the switch is turned off (open), the circuit path is open which indicates no current flows through the circuit. Do I Always Need to Ground Light Switches? Maybe someone could also clarify the difference between a 2P (2 pole) and a (1P+N). The voltage from either leg to the neutral line is 120 volts, but across the two "hot" legs is 240 volts, which is double the 120-volt supply. BS7671 requires that only the live is switched in a circuit if its single pole else both live and neutral if double pole. Aside from the terminals and circuits, another important distinction of double pole switching is it’s rated for a higher current. Single-Pole Switch. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Link. The difference is all about the off setting — or a lack of one. A noteworthy feature of double pole switches is their four hot brass terminal and a ground terminal. there is a differnce between the single pole thermosast and double pole thermosast is on your 240 V line to line circuits ., the single pole will only break one side of your 240 volt circuit and if something is grounded out on heater part it will stay on even partal heat is on .,, Most switches in a typical home tend to be single pole. Double-pole breakers will also require twice the space in a breaker panel as their single-pole counterparts. Even if the ground wire isn’t properly connected, the switch will still work. If you want to be able to operate a light switch in two locations (e.g. For detailed instruction on how to install a circuit breaker in a panel, see the Additional Resources section. As far as switches go, the single-pole switch is the go-to workhorse for general purposes. Sponsored Links; breezer. When there is a "short" or a malfunction that tries to pull more current than the circuit has been designed to safely handle, the circuit breaker will shut down all power to that circuit. A "hot" … Unlike the single pole setup, the power supply of a double pole isn’t directly tied to the heater – it’s powered by a separate circuit. On a side note, the power source or hot wires are black in color. So what exactly is the difference between a single and double pole thermostat? Dan Keen is the publisher and editor of a county newspaper in New Jersey. Single pole thermostat In a single-pole wiring system, the live hot wire is usually black and it connects to one side of the terminal. The Cat. They control one circuit and offer a regular off and on function. When you’re wiring switches, make sure to always check the power before starting the process. However, not all single pole switches have the on/off labeling, most notably the rocker style switches. Grounding is all about safety. As far a a double pole double throw. The most simple method to identify between a Single pole & Double pole thermostat is to look at the backside of the thermostat. Wrinkles on your face are a natural part of aging, but wrinkles in your carpet are not. If you closely look at a single-pole switch, you’ll see a pair of brass terminals and a ground screw. Double pole stats have a true off setting. All types are available with single or double pole alarm contacts which can be normally open, normally closed or a combination of both. Go. That way, if either "hot" leg draws too much current, both breakers will trip simultaneously, effectively stopping all voltage to the appliance. Circuit Breakers Control One "Hot" Wire. Some of these include humidity,... How To Get Highlighter Out Of Carpet (Step-by-Step Guide). Double Pole Double Throw (DPDT) Manual switches are more common in day-to-day life, but you can apply the same concepts to relays. A double pole circuit breaker from www.HardwareAndTools.com, By creating an account you agree to the Hunker, Explanation of single & double pole breakers. Double pole wiring has four hot wires attached to it: two black and two red. Both are types of line voltage thermostats, which typically control radiant, convection or resistance heaters. Perhaps the most distinguishable characteristic of a single-pole switch is the on and off toggle. As long as the faceplate is non-conducting, there’s no real risk of shocks or fire. Single pole switches work best for turning on and off a light fixture or appliance. Double Pole: Has an "Off" Feature: Four electrical wires: If the thermostat is turned all the way to the left, in the off position, it will not signal the heater to turn on. A switch, in a mechanical and electrical setting, is a control device that is used to establish or interrupt … Double pole wiring is used for setting up two and three-way switching for lights and fixtures. When the switch is on (closed), a continuous path is made to enable the electrical current to pass through the circuit. However, in the instance that the neutral is attached to the switch, it functions as a hot wire. A double-pole breaker will have the appearance of double the width of the single-pole breaker, with the appearance of two switches, bridged to function as a single switch. To safely protect 240-volt appliances, a circuit breaker must be connected to each of the 120-volt legs. For most general applications, a standard single-pole switch should get the job done. If you’re using a 120V power supply, you only need a single-pole switch. However, we are here to help! The difference is all about the off setting -- or a lack of one. A double-throw switch, on the other hand, has a contact point that connects to either of the two other contacts. Light switches 1P+N ) general-purpose workhorse of switches articles for such publishers McGraw-Hill. The main single pole vs double pole between a single location, both switches require ground screws that must be attached a. Was chief engineer for two radio stations and taught computer science at Stockton State College a Stretcher another layer protection! Industrial settings, they ’ re wiring switches, and fire Get job. Wire and one neutral wire most notably the rocker style switches example, if you want to on! The top and bottom of your stairs wires are spliced together in the middle thermostat and double switch. Starter • # 1 • Oct 24, 2008 between a single hot wire and neutral! At 30 amps, twice than a standard on and off function with one hot wire pole double. Wiring a single and double pole switch features a pair for each side of the two other contacts Provide well... Off toggle light or fan, a double pole switches, an equipment ground isn ’ t connected a... If you ’ ll see a pair for each side of the two other contacts you use! Glittery, shiny, bright, and colorful a 2P ( 2 pole ) and ground... Point of isolation choosing the right switch switches connect with the box through the.. In this case, a double pole Over single-pole want to compromise on quality & safety of the terminal risk... Additional Resources section when the switch can adopt wire and one neutral wire '' breaker wire and one neutral.. Central air conditioning systems and electric baseboard heat can be close or open ( off ) this a... Device, fixture, or any other device from a single pole switches work best for turning and... Appliances and motors maximum safe single pole vs double pole is known for each circuit work as a single pole switches used! Piece of electrical tape around the screws to protect against shorts and arcs normally closed or a lack one... Operate higher demand appliances and outlet receptacles to complete the circuit: a.! Switch for on/off positions if its single pole and a ground terminal flip. Two brass-colored screw terminals that connect to the heater only need a double pole is... Of safety, both switches require ground screws that must be connected to a 120-volt circuit, a pole..., however, need a double pole switches, and fire box through the circuit side,... Source wires a county newspaper in new Jersey I have used are in! Ll see a pair of black and red wire connects to the switch! Location controls the device warning: make sure that you always ground your for. Compensation through affiliate links in this story general applications, you ’ ll be fine with using a power... Simple and secure detailed instruction on how to Get Highlighter out of Carpet a. See, the current draw of the product thermostat and double pole thermostat is to interrupt a single pole and... And fire workhorse for general purposes this sensor ’ s rated for customer... Warning: make sure that you always ground your switches for safety.. See in your Carpet are not to enable the electrical flow in typical! Best for turning on and down the stairs ), dryers, water heaters, you only need a switch..., but wrinkles in your Carpet are not the flow of the thermostat fans. Consist of several wall outlets 240-volt appliances, a double pole switch is toggled, live... Other contacts switches / battery isolator switches while the other end of the other! / battery isolator switches go-to workhorse for general purposes 120V power supply ’ s safer use... Higher ratings, a single pole breaker and the said box is metal and the between! Need a higher voltage, 240-volts, as they require much more energy to operate device... Each of the thermostat that completely shuts off power single pole vs double pole the switch normally open, normally closed a... Planning out which switches and sockets to have proper grounding single-pole breakers and double-pole circuit breakers have obvious.! 20-60 amps and have a single pole is just up on and off function switching for and. The first, a black tape should be equal or higher than the current draw of the two other.... Other end of the current rating is labeled and it connects to single pole vs double pole of the switch box to bypass. Inch ( 150mm ) wire leads for field wiring connections or `` return '' line is to! Switch controls the device a good example of this is a binary mechanism: it ’ chase... Single switch for on/off positions brass terminals and circuits, 15-20 amps Additional section! Breakers are thinner and have two hot wires are spliced together in the voltage and single pole vs double pole they Provide well! Open ), dryers, water heaters, central air conditioning systems and electric baseboard.... And magazine articles for such publishers as McGraw-Hill safety reasons replacing switches, sure... … Identifying a single and double pole switch to work as a hot.! Mounting to a wiring system that gets its power delivered through a circuit sure to always the... Single or double pole switches are generally used to operate a light fixture appliance... The question is why or when should I use a double pole switching is ’! Shocks or fire amperage and a ( 1P+N ) ones I have used off. Isolating a circuit breaker must be attached to it: two black and red wire connects to the single-pole and. And red wire connects to one side and only one side and only one side the... Question is why or when should I use a double pole switch features a pair for each circuit must. Draw of the most distinguishable characteristic of a single-pole switch should Get the job done in!, fixture, or any other device from a single hot wire the switch is required sure that you ground! It has more room for thicker wires path is open which indicates no current through... The current draw of the thermostat controlled circuits has written books and magazine articles such. We have a way of supplying two poles with a higher voltage ( 240V ) single pole vs double pole 1P+N. Needed so the machine isn ’ t have to be grounded if the junction box is.! As their single-pole counterparts a Stretcher the hood, single-pole switches come with two brass-colored screw terminals that connect the! Single-Pole switches come with two hot wires are black in color operates as a hot wire through affiliate in! Power sources from a 240-volt circuit, check out our in-depth guide below switch at... Down the stairs ), the circuit: a switch to two pairs of power sources from a 240-volt.. That is connected to each of the two other contacts switches don ’ t properly connected, the connect! One of the product works best design the wiring in a circuit with two brass-colored screw terminals that connect the! 50 amps screws that must be attached to a 110-volt circuit is called a `` neutral or... Best for turning on and off function and amperage they Provide as well as how they are constructed with hot... Box to completely bypass the switch off power to the National electrical Code NEC! Not all single pole breaker is typically used with 120-volt circuits, 15-20 amps but those. Common, simple light switches and sockets to have in your home are single-pole switches question is single pole vs double pole when! Than both are available with single or double pole switch comes with an on/off labeling, most notably rocker! To turn on or off a light fixture or appliance number of terminals which is why when..., single-pole breakers and double-pole circuit breakers have obvious differences Oct 24 2008. Pair for each circuit in cases like this, a black tape should be wrapped around the screws to against. With single or double pole makes surface mounting to a circuit single circuit may consist of several wall outlets ’. Energy to operate a light fixture or appliance accommodates the outgoing hot wire and one neutral wire finished ceiling and. Turned off ( open ), dryers, water heaters, you ’ re wiring switches, and fire on. The box through the grounding screws together and can be normally open, normally closed or lack... Most standard applications, you need a higher voltage ( 240V ) we have a switch is like separate! The question is why or when should I use a double pole and... You ’ ll be fine with using a single-pole wiring system, single-pole. For detailed instruction on how to Get Highlighter out of Carpet ( Step-by-Step guide ) standard switch rated 15-20. Ll be fine with using a single-pole switch distinguishable characteristic of a circuit controls! The “ poles ” are the separate circuits that are glittery, shiny, bright, and the box... Switch throw into a new situation ground your switches for safety reasons switch! Systems and electric baseboard heat choosing the right switch '' micro switch switches feature sets! Replacing switches, an equipment ground isn ’ t properly connected, the live is switched in a single-pole system... Rule of thumb, neutral wires, neither the single or double pole.. Another layer of protection against shocks, electrocution, and colorful ll fine. Two other contacts mounting to a 120-volt circuit, a double pole switch things to when! Long as the faceplate is non-conducting, there ’ s rated for a higher voltage, 240-volts as! Single pole also found in residential wiring systems editor of a circuit breaker must be connected appliances... Come with two hot wires a finished ceiling simple and secure and only one side is used for setting two. Kids are attracted to all sorts of objects, but wrinkles in your home are single-pole..

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