Master Electrician Dad Teaches Son about Commercial Parking Lot Lights, and how to Fix, Thoughts?

What voltage do you think these are going to be at? Commercial parking lot lights are at >> 277. >> 277. Correct. Now, let's also talk about lighting controls. Let's assume that all the parking lot lights are good. All the underground is good, but we still have a problem. You're not working. What do you think it could be? >> Contacttor. >> A contactor. A time clock. >> Right. The emergency override. The photo cell. See guys, lights in commercial parking lots have to go on automatically, right? a photo cell that would control a contactor and that contactor would have the 277 volts at least three circuits passing through out to the individual parking lot lights. Right? But there's also a time where there are so many parking lot lights that that conttor literally controls a lighting panel. There's a handhole in all parking lot poles. Does a handhole have a bottom in it? >> No. Right. Handhole does not have a bottom in it. inside. You can reach out and what do you think you're going to pull when you pull those wires out? What do you think you're going to have? >> I'm going to pull like probably some 12 gauge wire. >> That's wrong for sure. Lighting. >> Well, think about the voltage drop. Think about how far these monster parking lot lights come. So, usually on these big monster parking lots, you're going to be dealing with number six wire. Wa!