When working on or around alternative current (AC) electrical systems it is important to understand the difference between the positive and neutral wires.
Wire Color Code: Explanation of Each Wire Color
Wire Marking Resources Creative Safety Supply
Electrical Wiring Colours - A Complete Guide
Wire Marking Resources Creative Safety Supply
Why is the positive wire (red) called 'hot'? - Quora
Ground, Neutral and Hot wires (US/Can) - The Engineering Mindset
Why do electric wires come in three's (positive, negative and neutral) when it's usually only positive and negative that are connected? - Quora
Polarized vs. Non-Polarized Electrical Plugs — 1000Bulbs Blog
What is a Neutral Wire (All You Need to Know)