uxcell AC 115/250V 30A CW4E-30A-S Noise Suppressor Power EMI Filter

There is a circuit diagram and component values shown on the cover of this device. I did a rough calculation based on these values as well as assumptions about the source and load impedances and calculated a roll off of -. Beginning at around 780 kHz, the levels drop by about 20 dB/decade. Lambda has a similar circuit topology filter with a corner frequency around 400 kHz, and I looked up their experimental curve. It is always difficult to accurately predict the performance of filters because of the input and output impedances, and beyond that, inductances and capacitances can cause significant deviations from the idealized and simplified case if the frequencies are high.

As 115 lines are divided into two to create 230, you would need two of these filters, one on each 115 line due to internal connections. If using these, I would look for filters that are designed for split phase before using them.

Wires should be bolted to it using some ring terminals (if you want to do it properly). That's how it looks in the picture. We can help you quickly and efficiently In addition to the wire, you can also bolt the wire directly to it (not I have not had a chance to try it out much to see if it has the potential to filter noise well. I believe both would work, though it appears to be a solid product.