Wrapping a Cable

Why are A/V cables wrapped over/under and power cables wrapped over/over?  Why is this an important skill for a beginning filmmaker?

    A/V cables are wrapped over/under because it follows the way that the cord wants to coil, helping to reduce tension and not get tangled. Power cables are wrapped over/over because it releases the tension as you go it and is the way that the cord naturally coils. Both of these techniques are used to prevent tangling and damage, increasing the lifespan of the cable. This is an important skill for a beginning filmmaker because cables are an integral part of using a lot of equipment; sound, lights, monitors, etc. all use cables to be powered and/or connected. So knowing how to properly wrap cables helps to increase efficiency and make them last longer, which is important especially when beginning as you may not be able to afford replacing equipment all the time. Additionally, knowing the skill can make you appear more professional, which is very important starting out if you want to break into the industry.