c/electricians

PSA: Had to pick between a 4/0 aluminum or 2/0 copper feeder for a garage sub-panel last month

The price difference was almost $800 for the whole run, so I went with the aluminum to save the homeowner some cash. I spent an extra hour prepping the lugs with the right oxide inhibitor and torquing them to spec, which felt like overkill at the time. Just finished the final inspection yesterday, and the inspector specifically complimented the terminations. It's a good reminder that the cheaper material can work fine if you do the extra steps right. Anyone have a favorite brand of anti-oxidant paste they swear by?

Serious question, saw a 'smart' breaker panel install in a new build in Scottsdale

The homeowner was bragging about controlling every circuit from his phone, but all I saw was a future service nightmare with proprietary parts. Has anyone actually had to troubleshoot one of these systems after the app gets discontinued?

Appreciation post: my journeyman pointed out my wire stripping was costing me 15 minutes a day

He showed me how to set the stripper depth on my Klein 11055s for 12 AWG instead of just squeezing until it felt right. What's your biggest time-saving trick that seems obvious now?

TIL about a weird voltage reading from a neighbor's old service

I was helping my neighbor in Akron check his garage outlet and my Fluke 117 read 123 volts on one leg and 119 on the other to neutral at the main panel. He said his lights have been dimming for years and just lived with it. Is a 4-volt imbalance like that on a residential split-phase something you'd chase down immediately, or is it often just a sign of a loose neutral connection somewhere that's been stable?

I just read that a standard 15-amp circuit can actually handle more than 3,600 watts.

Found it in an old code book from the 80s my boss keeps in the office. It said the 80% rule for continuous loads wasn't always a thing. Anyone know when that changed for sure?

Just spent 45 minutes looking for my voltage tester... it was in my back pocket the whole time.

Showerthought: everyone says to always check the panel first, but that wasted a full day for me on a Reno job

Spent 8 hours tracing a dead circuit only to find a nail through a wire in the attic, the panel was fine. Does anyone else think we over-rely on that advice sometimes?

Finally got my license after failing the business law section twice

Wasted almost $400 on retake fees because I didn't study the code book close enough... just focused on the calculations. Anyone have a good method for memorizing the NEC articles?

Just read a report from the NFPA about home generator hookups

It said about 85% of portable generator related carbon monoxide deaths happen after storms when people use them wrong. I found it in their safety data sheet online. They keep saying to put it at least 20 feet from the house, but how many homeowners actually measure that? Has anyone had to explain this to a customer who didn't want to listen?

Update on using aluminum wire in old houses

My boss, Frank, told me to always pigtail aluminum with COPALUM connectors, not just twist on a wire nut. I thought he was being too careful until I saw a melted outlet in a 1972 split-level last month. The homeowner said they just used regular connectors. Anyone have a go-to brand for those crimp connectors besides the usual ones?

I just saw a guy in Phoenix use a regular screwdriver on a live panel

He was trying to tighten a lug on a 200 amp main breaker with the power still on. I yelled at him to stop and he looked at me like I was crazy. The screwdriver slipped and sparked against the bus bar, could have been real bad. How do people still not know to kill the main first? What's the dumbest live work you've seen someone try?

That week we had to rewire the old theater downtown

We found knob and tube hidden behind every wall, plus three separate junction boxes that weren't on any of the original plans. It took us four days just to map it all out before we could even start the new runs. Has anyone else had a job where the existing wiring was way more of a mess than you were told?

I thought smart breakers were just a gimmick until my boss put them in a 12-unit Reno job

We wired a whole apartment building with them last year, and I figured they'd be a headache to program. But being able to check each unit's load from my phone saved us three callbacks in the first month alone. One tenant kept tripping a circuit with a space heater, and we fixed it with a remote reset. Anyone else using these on bigger jobs now?

My boss said we should always use aluminum for feeders over 100 feet to save cash.

I was wiring a new garage in Springfield last week and he insisted on aluminum for the 150 foot run. The inspector passed it but I've heard guys say copper is safer long term. What's your take on the cost versus corrosion risk debate?

Showerthought: I watched a homeowner try to fix a breaker with a butter knife

I was doing a panel upgrade in a 1970s split-level yesterday when the owner grabbed a kitchen knife to 'jiggle' a stuck 20-amp. He got a nice flash and a new nickname from his wife. What's the dumbest DIY fix you've walked in on?

My journeyman told me to always torque lugs to spec, and a call-back proved him right

He drilled it into my head during my apprenticeship in Spokane, but I got lazy on a panel swap last year and just went by feel. Got a call six months later for a hot bus bar, and sure enough, a few lugs were way under-torqued. What's the most common connection you guys see that people forget to torque properly?

Had a main breaker trip on a 20 year old panel during a heat wave

I was in a house in Tampa last week, and the AC kept cutting out. The main breaker felt hot to the touch, which was a bad sign. I shut everything down, let it cool, and tightened all the lugs on the bus bar. It turned out one was loose, causing heat buildup and the trip. Anyone else run into this with older panels when it gets really hot?

After 8 years I just realized my wire stripping method was costing me time on every termination.

I was watching a new apprentice and saw him strip a 12-gauge wire in one smooth motion while I was still doing my old two-step pinch and pull, so which method do you actually find faster?

Just realized I've pulled over 10,000 feet of 12/2 in my career

It hit me when I was finishing a basement rewire in Akron and had to order another 250-foot roll. Anyone else ever stop and count something like that?

Had a 200 amp main breaker trip on a brand new panel in a Denver remodel last month. The whole house went dark right after we powered up.

I was reading an old code book from the 1950s and the wire sizes were totally different

I picked up a vintage NEC handbook from 1957 at a yard sale last weekend. It said a 60-amp service for a house could use No. 6 rubber-covered wire. That's way smaller than what we use now for the same load. It really shows how much insulation and conductor materials have improved over the years. Has anyone else come across old specs that seem crazy by today's standards?

My journeyman in Phoenix told me to always torque the main lugs on a new panel to spec, even if they feel tight. I didn't on a quick service upgrade last month, and the connection failed after two weeks.

Just realized my old foreman was right about labeling every single wire

He told me 'if you can't trace it blindfolded in five years, you didn't label it right' on a big Reno job back in 2019. I used to just tag the hots, but now I label every conductor, even the neutrals, with the circuit number and panel. It saved me a ton of time today troubleshooting a lighting issue in that same building. Anyone else have a rule they ignored at first that they now swear by?

Reading an old code book from the 80s and the voltage drop rules were way different

I was cleaning out my dad's garage and found his old NEC code book from 1984. Flipping through it, I saw the voltage drop section and it was just a suggestion, not a rule. It said something like 'for good practice, keep it under 3% for branch circuits.' I checked my 2023 book and now it's a real rule in some places, like for feeders in certain spots. The old book had a whole chart for copper wire that assumed way higher resistance than we use now. It made me think about all those old houses we work on where the lights dim when the fridge kicks on. My dad said back then they just ran 14-gauge for everything and called it a day. Has anyone else run into problems because of this old way of thinking on a rewire job?

Just finished a week of rewiring a 1920s house in Portland and the old knob and tube was a real education.