Tips Related to EMI Filter Current Ratings
To determine the current rating requirements for a filter, consider the maximum current rating specifications for the system to which it is connected. This is the maximum root mean square (RMS) amperes or horsepower rating of the load that will be connected to the filter. If there is a breaker present, the filter must always be rated to meet or exceed the breaker rating.
You can connect some types of filters in parallel to achieve higher current ratings. For this approach to work, you need to use identical filter models, and the connection must allow the filters to share the current equally. Be sure to follow the National Electric Code (NEC) and all local electrical codes throughout the process.
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