These utilization categories determine what load the contactors are switching:
AC-7a are for slightly inductive loads for household appliances for example mixers and blenders
AC-7b are for motor loads for house hold appliances such as fans and central vacuums
The following is an extract from the IEC EN 61095 detailing the Utilization categories for Electromechanical contactors for household and similar purposes
Released for: Schneider Electric UK
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