Manual Transfer Switch In Contactor wiring | Auto manual wiring diagram

Manual Transfer Switch In Contactor wiring:

This diagram shows how to make a Manual Transfer Switch In Contactor wiring. Auto manual wiring diagram. In this circuit, we use a magnetic contactor, and two SP MCBs, ( Single Pole Miniature Circuit Breaker ). This circuit is very simple and easy to make. Now this circuit is ready for use. If you want to know more about this circuit please check our youtube video below the post.

Diagram of Transfer Switch wiring:

Components Need for this Project:

You can get the components from any of the sites below:

  1. Magnetic Contactor [See Buy Click Amazon]
  2. SP MCB [See Buy Click Amazon]
*Please note: These are affiliate links. I may make a commission if you buy the components through these links. I would appreciate your support in this way!

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Components used to make the Auto manual wiring:

01. Magnetic Contactor

Magnetic Contactor
Fig 2: Magnetic Contactor


A magnetic contactor is an electrical device used for load control, automation, and protection. It is much like a magnetic reel. However, relays are generally used for low power and voltage, on the other hand, when we think of high power, these heavy-duty contractors only come to mind. It basically works by switching the load on and off. It has 3 terminals whose inputs are denoted as L1, L2, L3, and outputs as T1, T2, and T3. The circuit of the load is made in automation mode or protection using auxiliary contacts. It has two types of terminals. 1) Normally Open (NO). 2) Normally Closed (NC)

02. SP MCB

SP MCB
Fig 3: SP MCB


MCB SP means single pole it protects only one phase switching. MCB (Miniature Circuit Breaker) Curswitch is the most basic general-purpose switch that you use to control a light or another device from one location. These Switches Have Two Brass-Colored Screw Terminals Connected to the hot Power Source Wires. (MCB) For any Distribution Board, the Protection System Must be Used in The Incomer. Phase and Neutral Single Phase Supply to break. 120-volt circuits, 15-20 amp single pole breaker is typically used.

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