Table of Contents
What is NC in schematic diagram?
Normally closed (NC) contacts disconnect the circuit when the relay is activated; the circuit is connected when the relay is inactive.
What does NC mean on a wiring diagram?
NC = normally closed contact. Normally open (NO) contacts connect the circuit when the relay is activated; the circuit is disconnected when the relay is inactive. Normally closed (NC) contacts disconnect the circuit when the relay is activated; the circuit is connected when the relay is inactive.
What does no NC and C mean in electrical terms?
NO terminal, NC terminal and COM terminal represent contact terminals’ symbols. Each symbol means a single terminal itself: Normally Open terminal, Normally Closed terminal and Common terminal respectively. On the other hand, contact point a, contact point b and contact point c represent contact structures.
What is N and O in wiring?
A classic switch has one input and one output. It can be NO (normally open) or NC (normally closed).
What are the standard electrical contactors in the table?
The Standard Assembled Forms in the table on Page V5-T6-8are three-wire open mechanically held 30A lighting contactors with 120V 60 Hz/110V 50 Hz base coil voltage, 120V control module voltage, and no additional auxiliary contacts.
How many wires does a lighting contactor have?
Two-Wire Mechanically Held Lighting Contactors— Standard Assembled Forms The Standard Assembled Forms in tables on Pages V5-T6-6and V5-T6-7are two-wire open mechanically held 30A lighting contactors with 120V 60 Hz/110V 50 Hz base coil voltage, 120V control module voltage, and no additional auxiliary contacts.
How do I order a contactor with a 2A coil?
1When ordering, select required contactor by catalog number and replace the magnet coil alpha designation in the catalog number (_) with the proper code suffix from the Coil Base Voltage table on this page. 2A number of other power pole configurations are also available using the single-pole and two-pole power poles.
What type of contactor is used in a two-wire control module?
A mechanically held contactor with a two-wire control module uses 1NC auxiliary contact as standard for the control wiring circuit. The mechanically held contactor with a three-wire control module uses 1NO-1NC auxiliary contacts as standard for the control wiring circuit.