36:18 put it on a radio. You likely have some kind of radio with you, right? Company radio? Airfield radio? Put the clamp over the radio antenna and key up. The meter should show some amps. This is how I tested mine. Also, if you take the final bolt out of a fixture and it sparks, you likely have a live fixture. It looks like someone just tapped an arc welder against something. Stop right there and have the circuit shut down before you go any further. Have you heard the one about the exploding can? If you're troubleshooting and you find the fault, often the atmosphere inside of the can will be white. It may be white with steam (and you can get a fixture launched into your face from steam pressure alone), but it's usually with vaporized wire insulation. This insulation is flammable. What do we need for combustion? Fuel, heat and oxygen. If the can still has an arc going on, you have two out of the three. Fuel from the vaproized insulation, heat from the arc and all it will take is cool oxygen to be drawn into the warm can and BOOM, you have an explosion. I've seen this once. The fireball went a good 3-5' into the air. Fortunately, we had all gone to get tools or whatever from our trucks. I was several feet away and felt the concussion from the blast. Imagine if someone had been standing over it. If you must open a hot can where you suspect the fault is, just barely loosen the bolts and pry the light up with a pry bar to see the smoke/steam rolling out of it. And wear your gloves to do it. After the exploding can, I'd ask for the ckt to be turned off before I opened where I thought a problem was. I've been shocked from what I figure was the primary side of a circuit. Just changing a light, I began to stand up and was grabbing at the bolts at the same time and I heard an arc and got a very bad shock. My momentum fortunately made it so I fell backwards and not forwards. Kind of a 'WTF just happened' moment. It went through the air to get me. Figure the voltage was between 800-1200 with the ckt on step 1. I've also opened a circuit hot. I swore my meter showed 0A, but I saw a small orange arc and saw the other interleave had gone dark. I about shit my pants when I realized what I'd done. The female joy kit must have been coming from the regulator. I don't work on the airfield anymore. I left due to some things going on with the airport where I worked, but I found out later it all may have smoothed itself over and I may have gotten a very nice raise would I have remained. Man I miss working on the airfield. "Bending pipe and pulling wire" is utterly boring to me now.
So where there’s a faulty light fixture with the cabling con sealed and having it locked out , how do you test for dead if you can’t access the cabling ?
One way to test your lockout - Lock the circuit for the fixture in question and then turn all other circuits in the area on. Now see if the light in question is on, or any light near the light in question is on. If any light near is on you could be on the edge (transition) of another circuit and the light in question could be live with a lamp out. Lock out all the circuits that could be in the area, then remove the light and test primary cables with a clamp-on ammeter before opening any primary wiring connections.
