White and grey wires are your neutral wires and those should never be connected to brown which is a hot wire. The ground wire also connects to the switch but the white wire gets spliced to the circuit neutral wire and bypasses the switch.

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Red wire and black wire. One is that the outlet is a 240 volt one which requires an extra hot wire. 12 black solid cu thhn wire model 11587358 view the southwire company 500 ft. Black wires are always hot wires meaning that they carry electricity. Red wires are also hot wires. Black wires are never used as ground or neutral wires and must always be treated with caution. 656ft20m electric wire 22 gauge awsom extension wire red black 2 wire stranded tinned copper for 3528 led strip lights 12v dc wire speaker doorbell wire 44 out of 5 stars 180 798 7.
Although a white wire should only ever be connected to another white or grey wire. The cable has a black wire which connects directly to the circuit and a red wire which connects to the switch. In most cases you see a red wire in an outlet box only in special circumstances. 12 red solid cu thhn wire model 11589958 view the southwire company 500 ft. Red goes to black or black to red because those are your hot wires. Solid copper thhn wire assortment 56 16.
If you see a white wire marked with black or red or a piece of black or red electrical tape at its ends that means its acting as a hot wire and is no longer neutral. Solid copper thhn wire assortment 56 16. As hot wires can be connected to each other a black wire can be connected to a red wire. Another is that the box is on a circuit three way switch loop. How to wire an outlet with red black and white wires. In standard 120 volt wiring the hot wire is black but it can also be red.