Electrician Family, Master Dad Quizzes Sons about Grounding Wires and Service Wires, Thoughts?

What's the equipment grounding conductor designed to do? What's the main purpose for an equipment grounding conductor in a conduit? To ground the uh metal box to facilitate the overcurren protection device to trip the breaker dummies to have a really short path to ground to create a short so that if that conduit were to collapse in whatever way, the ground is sufficient enough to trip the breaker, right? And that's why the equivalently grounding conductor has to be sized big enough to trip the main whatever it's being fed from. Right. So you said you pulled those extra wires, but now you can't pull the wire out. Why can't you just pull one wire out? >> Pull them out. >> Yeah. What size wire and what type of wire did you use again for the branch circuits? >> Most of them were 14 gauge. >> 14. You ran 14 gauge. What did you pull? Roxhn. >> Okay. THN. What installation starts with the letter X? >> Uh, it's XH. XHW. And what is that most commonly found? What type of wire is mostly XHW? [music] Like an SCU cables. Bam. Service cable. Aluminum cable. My job is done tonight. Good dinner. >> Baby's ready for >> All right. Pass. [sighs]