SCT-013-015 to Arduino UNO R3

I'm using SCT-013-015 that 15A to 1V current sensor to detect current in an energy meter's mainline using Arduino UNO R3, what resistors, connections, and code should I use to get the current value?

Please do Yourself a favour and read the first topic telling how to get the best out of this forum. Link: How to get the best out of this forum - Using Arduino / Project Guidance - Arduino Forum

have you even googled "sct-013-015 arduino" ?

Excellent tutorial on CTs: Learn | OpenEnergyMonitor

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It is also called a "CT" a Current Transformer.
SCT-013-015: https://www.amazon.com/SCT-013-015-Non-invasive-Current-Sensor-Transformer/dp/B07ZCPMYDL.

It needs a burden resistor and the voltage over the burden resistor is measured.
You also need a certain sample rate to keep up with the 50Hz or 60Hz AC current.

Did you put the Current Transformer over a single wire, or over the cable of the mainline ? Over the cable will not work.

OpenEnergyMonitor about a CT: https://learn.openenergymonitor.org/electricity-monitoring/ct-sensors/interface-with-arduino

[ADDED] Oops, jremington already gave that link

https://bfy.tw/S3vo