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Dr David Mills

Every warning label is a story someone tells somewhere.
#electronics #warningsigns

50 comments
Nixie

@Dtl From the creators of "pigtails are not handles"...

Andrew Lewis Workshop

@Dtl reminds me of a conversation I had with a colleague once:
Them: "have you worked on these before?"
Me: "yes, a few times..."
Them: "I've got the lid off, any advice?"
Me:"Um..."
Them:"arghhhhh!"
Me:"the heat sinks are live, not grounded?"
Them:"thanks."

Graham SpookylandπŸŽƒ/Polynomial

@LewisWorkshop @Dtl shocked myself on a network appliance a while back due to this. they had a couple of TO220 packaged diodes bonded to a heatsink, and the tabs were at mains potential. gave me a dead arm for about an hour.

DELETED

@Dtl

What a shame because caps make excellent handles. I’ve heard.

EndlessMason

@Dtl We had budget for a sticker, but not a proper handle. sorry.

PhoenixSerenity

@Dtl I was telling a couple of galpals about warning labels a couple of weeks ago & how for every one that exists - someone did something quite stupid. That's why we have labels like: "Remove cap, before drinking." & "Open bag, before consuming."

Elizafox

@Dtl 820 uf, damn that’s a big boi, power supply?

70% Coffee by Volume

@Dtl I saw this one night driving into work. I like to think there’s a page in a training document or similar as a direct result of this ladder placement.

The line was probably dead (that or the worker might well be), but the placement of that ladder is a real safety third sort of move. (I’m not even sure it’s secured)

Andrew Zonenberg

@VestigialLung @Dtl Given the location of the repeater box, that's probably a cable TV/internet line rather than a power line (those are typically higher up).

Not going to electrocute someone, but has potential to seriously annoy your local telco. And if they keep it up, they might get less lucky with their choice of wire next time.

70% Coffee by Volume

@azonenberg @Dtl not to mention, I guarantee that wire isn’t intended to be load bearing.

Andrew Zonenberg

@VestigialLung @Dtl Yep.

Climbing that ladder is quite likely to be harmful or fatal, but due to injuries from a fall rather than the shock hazard. If they're lucky it will break (or wiggle out of the way) before they get high enough to do serious damage.

Comrade Weez

@VestigialLung The strand cables carrying telephone trunk lines & CATV hardlines are at ground potential and are very sturdy. A couple hundred kg in tension on them. I would faaaar prefer using a ladder to climbing the pole with gaffs, especially a rock-hard treated timber pole. Short of a cherry picker that's the safest way to get up there. </ex CATV installer> @azonenberg @Dtl

πŸ‡ΊπŸ‡¦ haxadecimal

@VestigialLung @Dtl Agreed that the ladder placement is itself a safety hazard, but it looks to me like it only reaches the low voltage stuff (phone, cable TV).

Joe Uchill

@Dtl I suppose the sticker was cheaper than installing a handle.

Simon Richter

@Dtl this is missing a "Do not cover pressure relief breaking point with stickers" sticker on the side of the capacitor.

πŸ‡ΊπŸ‡¦ haxadecimal

@Dtl The next time I design anything with a large aluminum electrolytic capacitor, I am definitely going to put labels like that on them.

πŸ‡ΊπŸ‡¦ haxadecimal

@Dtl Avry makes printable round label sheets for Β½in to 3in diameter. Maybe more, that was the result of a cursory search. I have a Silhouette CNC paper cutter, so I could use full-sheet label stock.

teddy

@Dtl ...and a market opportunity. i am going to make my fortune on handle-rated caps

Dym Sohin

@Dtl clearly rectifying a design flaw of not providing actual handle

> Β«dont tell me what to do, Cacy, you not my real handleΒ»

jbr

@Dtl That one might sting a lot if it discharges on ya.

Tallawk

@Dtl
Every morning I read a safety rule from "The Book." The ones involving steam engines are always fun.
Once in a while I will remind my peeps that, "The rules are written in blood here. Every one of these has a story behind it."

Custard Smingleigh

@Dtl @tjkendon
I used to be a Dell certified hardware repair guy, fifteen years ago. There used to be at least one 1U rack mount server model where the system board had a wire cage holding down a big capacitor in the middle of the board. After fielding so many RMAs for ripped off capacitors they decided it would be cheaper to MAKE the capacitor into a handle.

tjkendon

@Smingleigh @Dtl my first thought when I read this was "The heart wants what it wants."

Kit Bashir

@Dtl @ifixcoinops that looks like a mistake you can make only twice.

ripper

@Dtl Well, you don't want to incapacitate the board.

Q McCallum

@Dtl That one story often leads to others:

"I'm sorry, you want us to print _what_ on a sticker? But why would ...? I mean, fine, here's the price tag and timeline, but ..."

James Green

@Dtl What'll they charge you with?

I'll see myself out...

subtlepseudonym

@Dtl If the capacitor can't briefly hold and later discharge some leverage, is it really worth having?

Logan Five

@Dtl I used to have a coworker who was in a competition with his friends to get warning labels put on things. For example, he would contact shampoo companies and say he ate their grape shampoo and then, bam, warning label not to eat the shampoo.

When I see things like this, I wonder how far his pranks have reached.

Bernard Tyers

@Dtl That's excellent. If there was anything that shouldn't be used as a handle in a circuit board, i don't think you could choose anything worse than a cap!

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