what are 3 factors when selecting a contactor for a job?

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what are 3 factors when selecting a contactor for a job?..

Answer / shubhanand athalye

1)contactor current rating and duty (Eg AC-1,AC-3 etc)
should be suitable for load.
2) Contactor coil voltage shall be suitable / available.
3) contactor coil burden shall be minimum.

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