# Single phase circuit on 3 phase current calc

 Hi,I have a question regarding calculating current in a 3 phase supply. I have my head around how to calculate the current in a 3 phase circuit. For example if we have a 22kw load assuming a power factor of 0.8 would be 22000/(1.732x415x0.8) = 38.25AHowever if I’m installing a 7.2kw single phase circuit on a 3-phase supply I.e using L1 (or L2 or L3) and neutral. Is the calc 7200/(1.732x230x0.8) = 18.06 ampsIt’s not the usual 7200/230 (simplified calc) where the current would be 31.30A we would use for a single phase supply?. Even though it is a single phase circuit?.Thanks,A. asked 6/15/2019 spark83192

In order to provide an answer to this question, you must Login

## I am flagging this question because...

10 inform moderator flags remaining

## I am flagging this answer because...

10 inform moderator flags remaining

## Flagging a Post

You have already flagged this post. Clicking "Remove Flag" below will remove your flag, thus reducing the count by one as well.

## I am deleting this answer because...

Understanding LV Circuit Breaker Fault Ratings

I think this post is going to be helpful to several of our readers. While the IEC low voltage circuit breaker Standard [IEC 60947-2, Low voltage switchgear...

9 power supply issues solved by using a UPS

Installation of a UPS can help in reducing problems due to issues with the power supply.  A lot of people relate this to nine key issues.  Depending on...

DC Motor Operation

Coils of wire on the rotor carry a d.c. current which generates a magnetic field. A stator magnetic field is created using either permanent magnets or...

Are We Losing Professional Integrity

I have been thinking recently that there appears to be less professional integrity around than when I first started my career in electrical engineering...

The 27 km, Euro 6 billion  Collider lies on the border between France and Switzerland, took nearly 30 years to complete.  Some of the lofty goals for the...

Resistors

Resistors are electronic components that oppose the flow of current.  Manufactured in various types and ranges they have a wide application to electronics...

Useful Motor Technical Information

Sometimes it’s useful to be able to quickly lookup a piece of technical information.  This note is a collection of information related to motors, and in...

Equipment Verification (to IEC Standards)

One of the requirements to ensuring that everything works is to have equipment selected, manufactured and verified [tested] to IEC standards. Not all equipment...

Calculating Cable Fault Ratings

When selecting a cable, the performance of the cable under fault conditions is an important consideration. It is important that calculations be carried...

Hazardous Areas – IEC and NEC/CEC Comparison

Depending where in the world you work, you are likely following one of two standards International Electrotechnical Commission (IEC) National...

Our website uses cookies so that we can provide a better experience.