Understand Commercial Voltage Systems

a facility, we turn the power off, but we still go in and turn the light on and we go, "Oh, what a dummy. The power is off." So, you might have a colleague, you might have someone come in, you turn a switch off, >> you're working on this one hallway and then someone walks in on another hallway and turns the three-way on. Yeah. And now you have >> energized. >> It's energized, right? So, we want to make sure that we can isolate the power. And often times we could look at a 1900 box cover and the panel will be listed along with the circuit. Yeah. >> Now once we do that then we have to determine how is this customer getting >> their fire inspection. They must have egress emergency backup lighting. It's either going to be a generator or it's going to be batteries. >> Yeah. So we want to make sure that we turn the battery off as well. >> Okay. is uh mainly like uh in lighting do they all have ballasts? >> Not anymore because lighting has evolved, right? Or traditional compact fluorescent fluorescent lighting has a ballast. Now they have drivers. >> Okay. >> So a lot of things are now LED and a little bit of different technology technology as this, but it's still the same. Now, another huge huge tip is never forget that the ceiling grid that we're often working through, right, with the drop ceiling where you can The tip is never use your fingertips to raise up a ceiling grid. Why? Because you leave debris on your fingers. You could be leaving fingerprints. There's nothing worse than finishing a commercial job and your fingerprints or your glove prints. So, I recommend you use your fists, >> okay? As you go up on your ladder, use