Types of Receptacles

The reasoning for 15/20 amp receptacles on 15/20 circuits is this. 15a and 20a receptacles have different pin configurations. A 20a receptacle will have one slot that is turned sideways or T shaped to allow a 20amp plug to be used.

An arc-fault circuit interrupter (AFCI) is a circuit breaker that breaks the circuit when it detects an electric arc in the circuit it protects to prevent electrical fires. An AFCI selectively distinguishes between a harmless arc (incidental to normal operation of switches, plugs, and brushed motors), and a potentially dangerous arc (that can occur, for example, in a lamp cord which has a broken conductor).

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How to Wire a Switched Half-Hot Outlet That Gets Its Power From the Outlet Box This is the preferred method of wiring a half-hot switched outlet, because if the power is coming from the switch, it is most likely a lighting circuit that is intended to operate lights, not outlets.

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