Like riding a bike

[trev]

For the first time in about 20 years I had to make some pyro off today. Did 40 ends and not one of them under 299 meg.
I'd forgotten how much I love the stuff

 

[HandySparks]

40 ends in a day. Are they really that quick to make off?

 

[trev]

Today was a good day, the first few were very slow then I remembered how to go about them. Then I accelerated.
Watch, tomorrow I'll screw em all up and get three done
40 ends in a day is easy mate, it's only 5 an hour

 

[D Skelton]

I'm guessing they were metric then! lol

 

[trev]

I'm guessing they were metric then! lol

Hmmmm?
Don't get that one, maybe it's the beer

 

[D Skelton]

I was making off imperial ones recently, they were an absolute barsteward! Took me about 20 mins just to strip back per end!

That was all, there was no hidden meaning

 

[trev]

New stuff mate 2L 1.5, lovely stuff

 

[tazz]

And I bet Trev...they will be 999meg when they dry out...

 

[Engineer54]

Probably using a MFT where the max insulation value is indicated as >299 Meg ohms. Which is why we use dedicated IR testers (5 Gig ohms) on our projects, as we need record insulation values a little more accurately to conform to project specifications...

I too like to have a go at making one or two MICC ends off into our fire alarm panels when given the chance. The electricians stand there watching, probably thinking i'm mad... lol!!

 

[Paul.M]

I got stitched up at collage by the workshop lecturer when teaching pyro. I really got on with him because we had the same dry sense of humor that others did not get. Anyway, I potted off and tested, dead short!!! Did it again and still a dead short!!! Another 7 attempts later and all had a L-N short!!!

Lecturer says "You've learnt a very important lesson today Paul, when the reel of pyro has been in the storeroom for a year, always cut off the first meter and dont pass it to a student LOL." He found it hilarious watching me getting frustrated whilst the numptys of the class got it perfect the first time! Got stiched up but it was a good laugh

 

[Engineer54]

I got stitched up at collage by the workshop lecturer when teaching pyro. I really got on with him because we had the same dry sense of humor that others did not get. Anyway, I potted off and tested, dead short!!! Did it again and still a dead short!!! Another 7 attempts later and all had a L-N short!!!

Lecturer says "You've learnt a very important lesson today Paul, when the reel of pyro has been in the storeroom for a year, always cut off the first meter and dont pass it to a student LOL." He found it hilarious watching me getting frustrated whilst the numptys of the class got it perfect the first time! Got stiched up but it was a good laugh

I'd never waste a metre of MICC cable, when a heat gun will get rid of any latent moisture in just a few minutes!! lol!! Never known moisture to reach a metre into a MICC cable either, maybe half a metre at most!!

 

[Andy78]

I got stitched up at collage by the workshop lecturer when teaching pyro. I really got on with him because we had the same dry sense of humor that others did not get. Anyway, I potted off and tested, dead short!!! Did it again and still a dead short!!! Another 7 attempts later and all had a L-N short!!!

Lecturer says "You've learnt a very important lesson today Paul, when the reel of pyro has been in the storeroom for a year, always cut off the first meter and dont pass it to a student LOL." He found it hilarious watching me getting frustrated whilst the numptys of the class got it perfect the first time! Got stiched up but it was a good laugh

I also had a pyro mistake at college, sorta stitched myself up for it though.

My AM2 assessor thought he would wander over for a chat while I was potting off. I was kinda glad for the distraction and glad he wasn't an invigilating robot that just watched me in silence. He did go on a bit but I wasn't about to tell the guy who was marking me to sling his hook elsewhere.

I got the pot completed making sure the compound was evenly spread, only to realise that through chatting I had forgotten to put the gland and back nut on, and the other end was already made off.

"Oops" he said "that's a shame really, I can't give you another piece now" and toddled off to distract someone else.

I still passed as the MI was electrically sound, just not mechanically.

 

[shanky887614]

Probably using a MFT where the max insulation value is indicated as >299 Meg ohms. Which is why we use dedicated IR testers (5 Gig ohms) on our projects, as we need record insulation values a little more accurately to conform to project specifications...

I too like to have a go at making one or two MICC ends off into our fire alarm panels when given the chance. The electricians stand there watching, probably thinking i'm mad... lol!!

Flukes only go upto 299

Megger goes to 999 (ive used both)

 

[Kamikaze]

At college I would make a piece off and test it with a windup 1000V megger (we were posh in them days) and then leave it for the lecturer to tidy up later. Didn’t take him long to remember to shorten out the ends first before picking it up. :devil2:

 

[shanky887614]

At college I would make a piece off and test it with a windup 1000V megger (we were posh in them days) and then leave it for the lecturer to tidy up later. Didn’t take him long to remember to shorten out the ends first before picking it up. :devil2:

a mate walked around with a capacitor in a pair of pliers and said here you go to someone.

They didnt half jump

 

[Geordie Spark]

For the first time in about 20 years I had to make some pyro off today. Did 40 ends and not one of them under 299 meg.
I'd forgotten how much I love the stuff

There was me thinking we were going to get a good salacious account of Trev's past conquests.

I'm going to PM Dan and ask for my entrance fee back.

 

[telectrix]

just so long as it wasn't a back entrance fee. ooooh matron.

 

[trev]

And I bet Trev...they will be 999meg when they dry out...

Test gear only goes to >299 meg mate but you're probably right. My tester goes to >1999 but the ones work uses are Meggers (forget the model number)
As predicted I got half a dozen done today and 4 of them were down, little bit of remaking the ends soon sorted that out though

 

[Engineer54]

Most MFT's only go up to >299 Meg, as in the majority of cases there is no need to go higher. That's generally the realm of dedicated IR testers...

 

[tazz]

As I really don`t do much electrical work now, with our partners companies covering this side. I still use separate testers, which although calibrated go up to 999megs, as with fire I only need to prove insulation at 500v and R1/R2 on first fix...with our new fancy Hochiki & Apollo testers proving all other info on second fix including where the o/c , n/c or earth fault is right down to the nearest 2 devices or 10m of cable. But old methods are still the best and an insulation/r1/r2 test, saves a lot of hassle....I personally will not take on a commissioning job without a insulation/r1/r2 test from the electrical conpany.

 

[Paul.M]

MFT's go up to >1000M ohms @ 500V btw.

My wife (aka my full time carer) has just reminded me, on that day at collage I came home with Pyro and all the tools loaned from the workshop (not normally done but I was P1ssed off that I did not make one gland off in the class). I sat at the dining room table for 2 hours making them off whilst she cooked dinner. Every one was spot on lol.

Never had to use this skill since! But I know how to do it. And it s a skill. Well done Trev, wish I was on your shoulder watching you mate. PS D/S say hello

 

[trev]

Mine goes to >1999 mate, same measurement at 1Kv
Pyro is great, everything should be wired in it, even hairdryers and kettles

 

[SPARTYKUS]

Thats a lot of Ohms, even 299, thats getting on for a third of a BILLION Ohms. Thats alot of Ohms.

alot.

 

[Paul.M]

Hair dryers!!! Trev you have just hit a nearve with that one mate. I've got an hairdressers shop to rewire and the hair dryers are giving me an headache for the RCD's and the different floors they are on?

Pyro would be a good solution but the customer will not pay for anything more than pvc. Conduit here we come lol.

 

[trev]

Give him 2 quotes mate, one for the Rolls Royce job and one for the one you think he'll go for. Don't forget though mate you still have to worry about water with conduit unless you go for splashproof fittings on the ends of them, which will start to rack up the £s again

 

[Paul.M]

Thanks Trev, I'm giving him booth barrels. Owners thinks he can project manage a re-fit with the trades? The Chuckle Brothers would do a better job of it lol.

 

[trev]

Owners project managing? Oh dear. I'll be willing to bet their construction industry experience is zero too?

 

[Engineer54]

MFT's go up to >1000M ohms @ 500V btw.

I'm sure some of them do, but not all of them, they don't!! lol!!

My Megger MFT (CM500) i have at home, goes up to >499 Megohms at 250V/500V/1000V. Others as i stated can range between >199 ~ >299 Megohms... Not sure why an MFT's IR maximum value levels need to be so high? (1000 Meg) It's got to add a premium to the cost of an MFT, that most will never need... Pretty much superfluous above 200 Megohms for the majority of installations...

 

[KFH]

The MFT 15nn have an analogue needle, as well as the numeric display, which hasa scale up to 1000 MOhm and then to infinity, but not beyond.

 

[trev]

Only Buzz lightyear can got to infinity AND beyond.

 

[SPARTYKUS]

Paul.m i (mostly) rewired a god awful dogs dinner of a mess of a hairdressers 3 years ago, all manner of problems.

hairspray in the smoke alarms was the best

when I got there, there was almost no insulation on the Neutral from the meter, no gas or water bond, the 'plumber' had been in and fitted a couple of sinks and disconnected a spare shower...by simply snipping the 6.0mm2 T+E and left it resting (live) on the water pipe.

and the list goes on

 

[Engineer54]

The MFT 15nn have an analogue needle, as well as the numeric display, which hasa scale up to 1000 MOhm and then to infinity, but not beyond.

And what does ''Infinity'' mean on a IR meters megohm range?? Not a lot basically, it just means beyond the range of measurement of the meter you are using.