According to UL's White book, "3–pole circuit breakers are suitable for use on 3-phase3-phaseThe conductors between a voltage source and a load are called lines, and the voltage between any two lines is called line voltage. The voltage measured between any line and neutral is called phase voltage. For example, for a 208/120 volt service, the line voltage is 208 Volts, and the phase voltage is 120 Volts.https://en.wikipedia.org › wiki › Three-phase_electric_powerThree-phase electric power - Wikipedia systems only, unless marked to indicate use on 1-phase systems, such as, “For 1–phase connections, use two outside poles,” or an equivalent statement.
What are 3 pole breakers for?
Used most often in a three-phasethree-phaseThe conductors between a voltage source and a load are called lines, and the voltage between any two lines is called line voltage. The voltage measured between any line and neutral is called phase voltage. For example, for a 208/120 volt service, the line voltage is 208 Volts, and the phase voltage is 120 Volts.https://en.wikipedia.org › wiki › Three-phase_electric_powerThree-phase electric power - Wikipedia electrical system, a three-pole breaker connects three different conductors, such as is often required by heavy duty industrial motors. When a surge exists anywhere in the system, across one or more of the conductors, the breaker trips, the power bridge collapses, and the circuit opens.
What wire goes where on a breaker?
The black wire is the "hot" wire, it carries the electricity from the breaker panel into the switch or light source. The white wire is the "neutral" wire, it takes any unused electricity and current and sends it back to the breaker panel.Sep 29, 2021
Can I use a 3 phase breaker for single phase?
A 3p breaker can be used on a 3 phase system using either 2 or 3 poles. A 3p breaker can be used on a 1 phase system only if indicated by the markings as noted below.
Why would you use a 4 pole breaker?
4 pole circuit breakers have advantages in the case when one of the poles of the device will get damage, and it also provides isolation from neutral voltage. Normally, Neutral is not allowed to break in any conditions, (except special applications) for human & equipment safety.
What does 4 pole switch mean?
Four-way switches are used to control lighting from three or more locations. Four-way switches are used in combination with three-way switches. There are four terminals that provide two sets of toggle positions on a four-way switch. ... When the switch is in the up position, the current can flow through two terminals.Jun 9, 2021