CT Accuracy / CT40 vs. CT80 for 15 amp circuit

[sub3marathonman]

I have wondered if there was a difference in accuracy for the CT40 vs. the CT80 on a lower amperage circuit, even down to 15 amps. If for some reason a CT80 was used there on a 15 amp circuit, is it then less accurate than a CT40 used there?

The specs give the 3% accuracy, but don't really say for what range of current.

This is more a theoretical question than a need to know question.

Also, without cluttering up the topics, I was wondering approximately how much accuracy would be lost just using 1 CT on a 240V circuit and doubling the amount, instead of the two CTs as is proper. Have people seen an imbalance between the two separate legs?

Thanks for the help.

[ben]

I have wondered if there was a difference in accuracy for the CT40 vs. the CT80 on a lower amperage circuit, even down to 15 amps. If for some reason a CT80 was used there on a 15 amp circuit, is it then less accurate than a CT40 used there?

The specs give the 3% accuracy, but don't really say for what range of current.

This is more a theoretical question than a need to know question.

There's an accuracy chart for each CT here under specs:

http://brultech.com/products/ECM1240/pa ... icro40.htm
http://brultech.com/products/ECM1240/pa ... icro80.htm

1A or less, or the upper scale of each CT is when things tend to get inaccurate.

Also, without cluttering up the topics, I was wondering approximately how much accuracy would be lost just using 1 CT on a 240V circuit and doubling the amount, instead of the two CTs as is proper. Have people seen an imbalance between the two separate legs?

If it's a balanced load, there shouldn't be any accuracy loss. If it's something like a dryer, etc. you need to use 2 CTs.

[sub3marathonman]

There's an accuracy chart for each CT here under specs:

http://brultech.com/products/ECM1240/pa ... icro40.htm
http://brultech.com/products/ECM1240/pa ... icro80.htm

1A or less, or the upper scale of each CT is when things tend to get inaccurate.

That's exactly what I was looking for. I don't know why I didn't see it myself.

Thank you for the help.