A single pole 3-way switch is used to control a light or other electrical device from two different locations. It has three terminals: one common terminal and two traveler terminals. When the switch is flipped, it changes the connection between the common terminal and one of the traveler terminals, allowing the circuit to be opened or closed from either location.
A single pole switch controls one circuit, while a double pole switch controls two separate circuits.
A 3-way switch can be used as a single pole in a circuit by connecting the common terminal to either one of the traveler terminals. This effectively turns the 3-way switch into a regular on/off switch, allowing it to control the flow of electricity in the circuit like a single pole switch would.
It stands for Single Pole Single Throw
A single pole light switch controls one circuit and has one switch, while a double pole light switch controls two circuits and has two switches.
The "sw" is electrical terminology for the word "switch". A single pole switch is one that opens the circuit when in the off position and closes the circuit when in the on position. Individual switches that turn on light fixtures in your home are in the classification of single pole switches.
Replacement for American Switch single pole 15 amp circuit breaker
A double pole switch is used to control two separate circuits simultaneously, while a single pole switch only controls one circuit. This means that a double pole switch can completely disconnect both the hot and neutral wires, providing a higher level of safety and control compared to a single pole switch.
By using DPST(Double Pole Single Through) switch.
A single-pole, single-throw (SPST) switch has an on-off position with one pole and one contact. It is the simplest type of switch where the circuit is either connected (on) or disconnected (off) with just one path for the current to flow.
Replacement for American Switch single pole 15 amp circuit breaker
The first clue would be,having voltage at the terminal of the switch, when the switch is turned on,the circuit does not energize.
In North America, the use of a two pole single throw switch is used for this purpose. The reason that a two pole switch is used instead of a single pole switch is that code requires that both legs to the 240 volt load has to be broken so as to isolate the load completely from the supply voltage. If a single pole switch was used in this situation one leg of the 240 volt supply would still be "hot" to ground. Someone that is inexperienced with the system could get a nasty shock by just using the switch to isolate the circuit when working on it instead of using the supply breaker to isolate the circuit. In the UK it is a different scenario as the load across the 240 supply returns to a grounded neutral. In this case just a single pole single throw switch will isolate the circuit.