Refers to the number of conductors or wires that the circuit breaker disconnects at one time.

Output terminals on a switch. A single set of contacts; (i.e., three sets of contacts equal three poles.)

a contact on an electrical device (such as a battery) at which electric current enters or leaves

a component of the switch that is moved by the switch action to make or break electric contact

a contact set , a SP switch was one contact set and a DP has two contact sets for example

a set of contacts that belong to a single circuit

a set of contacts thatbelong to a single circuit

A space in a panelboard (or switchboard) where a branch circuit protective device can be attached to connect a branch circuit to the bus bars (buses) and protect the branch circuit from overload.

An independent electrical circuit of a switch.

A pole of a switch consists of the parts necessary to control one conductor of a circuit. A switch may be single pole or multipole, depending upon the number of single poles that are operated simultaneously.

A combination of mating relay contacts: normally open, normally closed, or both.

The number of completely separate circuits contained in a switch. A single pole switch can control only one circuit at a time. A double pole can control two independent circuits at the same time.

In an active filter, a single RC circuit. A one pole filter has one capacitor and one resistor. A two pole filter has two RC circuits and so on.

A portion of a filter circuit. The more poles a filter has, the more abrupt its cutoff slope will be. Each pole causes a slope of 6dB per octave; typical filter configurations are two-pole (12dB/oct) and four-pole (24dB/oct). See rolloff slope.

Calculation of the amount of hot wires connected to an electrical circuit breaker; single pole has one, double pole has two.

A relay contact.