Comparison APC PM1W-FR vs APC PM1W-RS

The number of sockets with type F grounding, provided in the design of the mains filter.

In this case, we are talking about full-size European type F sockets with metal ground clamps on both sides at the edges of the socket. The "socket" in this case means a CEE 7/4 ("Schuko") standard plug. Grounding is required for the safe operation of some types of electrical appliances, in particular, washing machines and other machines that work with water, refrigerators, computers, audio equipment, etc. A detailed list can be found in the reference literature. If you plan to connect such devices through the filter, this filter must have sockets with grounding.

The number of sockets with type E grounding, provided in the design of the mains filter.

French Type E sockets use a two-hole pattern for the supply of electrical current and an integrated earth pin just above the center plane of the socket. Plugs for them are made with a characteristic hole for a grounding contact.