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Author: Admin | 2025-04-27
Whether you're rewiring a receptacle, installing a new light fixture, or updating your sprinkler system, chances are, you'll need to connect multiple wires together securely to make your new device or outlet work. The easiest way to make these circuit wire connections is with a little piece of plastic or ceramic called a wire connector, or wire nut— and knowing the right wire nut sizes to use for each type of project is key in making your DIY wiring last and preventing loose connections. The Spruce / Michele Lee Wire Nut Sizes by Color Standard wire nuts come in five main sizes, which are usually color-coded to show the ranges of wire gauges— or wire thicknesses, measured in AWG— that they can be used for. Bigger wire nuts can also be used for wires that carry higher voltages, or more power. The colors can vary, but as a general rule: Gray wire nuts can accommodate wires between 22-16 AWG, up to 300 volts.Blue wire nuts can accommodate wires between 22-14 AWG, up to 300 volts.Orange wire nuts can also accommodate wires between 22-14 AWG, but of higher voltages up to 600 volts.Yellow wire nuts can accommodate wires between 18-12 AWG, and up to 600 volts.Red wire nuts can accommodate wires between 18-6 AWG, and up to 600 volts. You may also come across green wire nuts, which are used to join copper grounding wires, or purple wire nuts, which can be used to join aluminum and copper wires.TipRemember, wire gauge is measured and labeled so the lower the number is, the thicker the wire is. This means gray wire nuts are for the smallest wires, and red ones are for the largest. Types of Wire Nuts There are a few main types of wire nuts and connectors you can use for different electrical wiring projects in and around your home. Standard Standard, or twist-on wire nuts, are color-coded by the wire sizes they can fit. Twist-on wire nuts can be round, square, or have built-in wings to make twisting easier to do by hand. They're usually made from a durable
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