Micc

[the pict]

Today I undone a tangled mess of cables in a enclosure it contained lighting and heating and alarm cables none with any id, after about 3 hours I had the whole lot sorted and reconnected, apart from one MICC which had the conductors exposed taped and silicon sealed as a insulation method, no really, as this had only one N connected to a live feed, and I assumed it must be a unused circuit, that is untill the publican tried to switch on a couple of florries which failed to work. After going through all I had done, I thought, surely not, but yes this was the supply to said florries, so now I need about 20 metres of 1.5 But why was this used, in the area served it is all done neatly into domed shaped flex outlets, with the MICC all glaned off proper, was this a normal practice it is in a large glasshouse used for fucntions installed in the 50's
Pict
PS anyone got a pictorial how to for MICC

 

[Risteard]

Give it 20 years (if I'm still around) and I'll make a fortune on Antiques Road Show. How much for a replacement blade?

Not too bad. Got a replacement blade recently for I think around £6.

 

[GLENNSPARK]

the barrel type winders are better and dont forget...to cut off and condemn the first 6" of any pyro you buy as the insulation is hydroscopic. once you have wound enough of to expose enough core for your needs just get some pliers behind the barrel winder and grip the pyro with em....wound off copper should just break off....you cant hang around with this stuff either as its hydroscopic and will take in enough moisture in a short space of time to affect IR (which should be carried out at regular intervals to assess the condition/deteriation) You will also need a press tool to "set" the pot before you screw it on and dont forget to place gland on pyro first before setting the pot..lol....you might want to invest in some pot crimpers (although careful use of pliers works) and all the time that IR is coming down......

 

[alarm man]

the barrel type winders are better and dont forget...to cut off and condemn the first 6" of any pyro you buy as the insulation is hydroscopic. once you have wound enough of to expose enough core for your needs just get some pliers behind the barrel winder and grip the pyro with em....wound off copper should just break off....you cant hang around with this stuff either as its hydroscopic and will take in enough moisture in a short space of time to affect IR (which should be carried out at regular intervals to assess the condition/deteriation) You will also need a press tool to "set" the pot before you screw it on and dont forget to place gland on pyro first before setting the pot..lol....you might want to invest in some pot crimpers (although careful use of pliers works) and all the time that IR is coming down......

glen thats quality,you make doing a pryo end off sound like diffusing a bomb..:devilish:

 

[ufkir]

hey pict where are you think ive got everything you need

 

[Engineer54]

the barrel type winders are better and dont forget...to cut off and condemn the first 6" of any pyro you buy as the insulation is hydroscopic. once you have wound enough of to expose enough core for your needs just get some pliers behind the barrel winder and grip the pyro with em....wound off copper should just break off....you cant hang around with this stuff either as its hydroscopic and will take in enough moisture in a short space of time to affect IR (which should be carried out at regular intervals to assess the condition/deteriation) You will also need a press tool to "set" the pot before you screw it on and dont forget to place gland on pyro first before setting the pot..lol....you might want to invest in some pot crimpers (although careful use of pliers works) and all the time that IR is coming down......

Why would you cut off the first 6 inches?? Your going to be stripping at least the first 6 inches and probably more!!! MICC may be hygroscopic, but there is no reason to rush making off a MICC end, It's not going to take in enough moisture in that short a time to affect IR your readings. As i said you don't need any of the specialised tool to make a pot off, they just make things a hell of a lot easier.

At least you seem to know how to terminate an MICC pot and gland, which is a dammed sight more than most these days. MICC cable is probably one of the best types of cable ever produced, ...it's longevity is legendary. Contrary to common belief, used in the right circumstances it can be also be a cost effective installation solution...

 

[Kiers1970]

blimey, I'l sell mine on Antiques Roadshow.... and need them a week later! Was never a fan of the joistripper, ever get the darn thing to work... T-bar or screwdriver for me.

 

[GLENNSPARK]

Why would you cut off the first 6 inches?? Your going to be stripping at least the first 6 inches and probably more!!! MICC may be hygroscopic, but there is no reason to rush making off a MICC end, It's not going to take in enough moisture in that short a time to affect IR your readings. As i said you don't need any of the specialised tool to make a pot off, they just make things a hell of a lot easier.

At least you seem to know how to terminate an MICC pot and gland, which is a dammed sight more than most these days. MICC cable is probably one of the best types of cable ever produced, ...it's longevity is legendary. Contrary to common belief, used in the right circumstances it can be also be a cost effective installation solution...

Well eng...because its been stood/stored for any length of time before use and my post said that you cant hang around with this stuff...that does not constitute rushing the job but to be sure of the procedure before starting and making sure that all the tools, compound, pots etc are to hand so theres no delay and everything goes smoothly and professionally. As far as its longevity and resistance to bangs, knocks etc whilst still maintaining its integrity ...I absolutely agree with you eng and it should be taught more as there seems to be less and less people around that can work this stuff.........

 

[ipf]

When I first got one, the joistripper was as its name suggests compared to it's predecessor, that bloody thing with the round blade. Always have a T-bar handy anyway.

 

[Engineer54]

Well eng...because its been stood/stored for any length of time before use and my post said that you cant hang around with this stuff...that does not constitute rushing the job but to be sure of the procedure before starting and making sure that all the tools, compound, pots etc are to hand so theres no delay and everything goes smoothly and professionally. As far as its longevity and resistance to bangs, knocks etc whilst still maintaining its integrity ...I absolutely agree with you eng and it should be taught more as there seems to be less and less people around that can work this stuff.........

Depending on it's CSA, moisture rarely travels more than a foot to 18 inches even after several weeks. More often than not, you will be stripping this amount of sheath anyway, especially at a fire alarm panel or CU. As for not hanging around, when making a pot off, ...I've known electricians going for lunch or having a tea break in the middle of terminating MICC ends. While not especially a good idea to leave a pot half completed, there are a lot of myths around about MICC cable, rates of moisture contamination being one of them.

 

[GLENNSPARK]

Depending on it's CSA, moisture rarely travels more than a foot to 18 inches even after several weeks. More often than not, you will be stripping this amount of sheath anyway, especially at a fire alarm panel or CU. As for not hanging around, when making a pot off, ...I've known electricians going for lunch or having a tea break in the middle of terminating MICC ends. While not especially a good idea to leave a pot half completed, there are a lot of myths around about MICC cable, rates of moisture contamination being one of them.

Well thats fair advice eng. The guy at college just kept banging on and on about timescales with this stuff....but of course its down to ones self to determine how long to take making it off etc. I guess (like most things) as you work this stuff more you get used to the advantages (and limitations) of it. I found it very interesting when we were being shown how to make it off and gland etc so it would be something i would be interested in "getting into" when out for myself in industry.....

 

[Guest112]

my mate in work gave me a set of pyro tools the barrell stripper and the pot crimper for nothing, i dint realise they were that expensive tbh makes me ever more greatful will have to get him a few pints

hat off to a lot of existing pyro installs ive seen on my travels the workmanship was brilliantback in the day when there was more skill to the trade, i like pyro havent made many ends offf but its definately a skill,

 

[GLENNSPARK]

my mate in work gave me a set of pyro tools the barrell stripper and the pot crimper for nothing, i dint realise they were that expensive tbh makes me ever more greatful will have to get him a few pints

hat off to a lot of existing pyro installs ive seen on my travels the workmanship was brilliantback in the day when there was more skill to the trade, i like pyro havent made many ends offf but its definately a skill,

And one worth learning i would say....the less that can do it ...the more "exclusive" those that can.....

 

[ipf]

my mate in work gave me a set of pyro tools the barrell stripper and the pot crimper for nothing, i dint realise they were that expensive tbh makes me ever more greatful will have to get him a few pints

hat off to a lot of existing pyro installs ive seen on my travels the workmanship was brilliantback in the day when there was more skill to the trade, i like pyro havent made many ends offf but its definately a skill,

Basic part of the job in days gone by. Bit of care and a megger.

 

[the pict]

If I ever need to repair any of this type of install I will post the job on here, tbh I couldn't be arsed with it ,I suppose on a new install it'd be fine but repairing this stuff after 60 years in service I think the moisture would be pouring out the far end.
Pict

 

[malcolmsanford]

Depending on it's CSA, moisture rarely travels more than a foot to 18 inches even after several weeks. More often than not, you will be stripping this amount of sheath anyway, especially at a fire alarm panel or CU. As for not hanging around, when making a pot off, ...I've known electricians going for lunch or having a tea break in the middle of terminating MICC ends. While not especially a good idea to leave a pot half completed, there are a lot of myths around about MICC cable, rates of moisture contamination being one of them.

Pet hate of mine was opening a DB panel and seeing pots fed half way down inside the thing with banjo string tails ......................hated it.

Pict if the cable is 60 yrs old mate finding imperial terminations will be a joy.