Friday, August 14, 2015

How To Wire Ammeter With Current Transformer (CT Coil)

In my last post i guide you about the ammeter wiring which is only for low load and in this article you will learn that how to wire ammeter for high load or High ampere testing. In this post i am sharing with you a diagram in which i wired an ammeter with current transformer which is well know with his short name CT Coil.
By using the ammeter and CT coil we can measure high load ampere, Note that we use this wiring method for power wiring and by using this ammeter wiring we can test, measure high load circuit or ampere.

To wire the ammeter with current transformer, follow the below method, in the below diagram i shown that how wire the ammeter with CT coil. In the CT coil have to terminals which are negative and positive - and  +. Same ammeter have two terminals - and +. To wire ampere meter connect the CT coil positive to ammeter positive terminal and CT negative terminal to ammeter negative terminals by using the electric cable as shown in below figure.

ammeter wiring diagram

For measure the ampere using the ammeter and current transformer pass the electric supply wire between the CT hole as shown in above diagram. Note that pass only one wire between the CT Coil.

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I hope now you will be able to do the ammeter wiring after visiting this site, for more update and learning stay tune with us.


  1. how much ct coil costs for single phase ratings ? :-)

  2. how much ct coil costs for single phase ratings ? :-)

  3. Can I connect two CT coils to one ammeter, to measure two current phases and obtain the total power consumed by the load?

    1. you must install ammeter selector switch for this. i published a post about this you can find it just from our website search. search "ammeter selector switch" and you will find out.