Polarized Plug Wiring Diagram

If installing a plug on an appliance where the wiring is not color coded observe the connection before cutting the old plug from the appliance. Wiring a new plug isn t difficult but it s important to get the hot and neutral wires connected to the proper prongs. The key is to make sure you connect the wires to the proper terminals in the plug.

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This is an older version of the receptacle outlet in the first diagram.

Polarized plug wiring diagram. Electrical wiring is governed by a general electrical code. An electrical plug is designed to complete an electrical circuit from your home s electrical panel to your electronic device and back. When there are three prongs these are known as grounded plugs and they are designed to fit into wall outlets so the round bottom prong fits into the ground slot on the outlet thereby connecting the appliance s wiring to the house s grounding. The slots are different sizes to accept polarized plugs but it lacks a grounding slot.

For example current code dictates three prong polarized receptacles and dictates the use of ground fault interrupters in locations where an electrical appliance may be dropped in water. No attempt to summarize the code will be made here but a few examples may be instructive. At the end of any appliance electrical cord there is a plug with two or three prongs blades designed to fit into standard wall outlet receptacles. The simplest way to tell if your receptacle electrical outlet is polarized is if you are able to plug in a three prong plug nema 1 15 ground type b or if a two prong plug nema 1 15 ungrounded type a can only fit with the larger prong on the left.

Install a 110 volt polarized electrical plug by connecting the white wire to the steel or chrome plated screw the black wire to the brass screw and the bare ground wire if it is used to the green screw. The electrical code and variations. Wiring an ungrounded polarized outlet. The worry is that a miswired plug poses a fairly serious shock hazard.

The danger isn t fire. Wire a plug to maintain correct polarity.