Extending MICC cable

benselectrics · Jun 10, 2019

Does anyone in the South London area have the tools and experience to work on 3H10 MICC cable? I have a client that has two supplies to his property (house and basement flat). Both cables come into the house via an under-stair entrance. They're trying to do the place up and one cable needs shortening while the other needs lengthening so they can be fixed flat against the wall. Please let me know if you're interested. It's in Herne Hill.

kerching · Jun 10, 2019

There are a small number on here who can do it, myself included. It will not be cheap, and I am a few hundred miles away so,well out of the running.

just another skill that is no longer taught as the trade spirals to the bottom

Blue Duck · Jun 10, 2019

Too far for me...

Is it a looped supply from the service head (main fuse) ?

UKPN don't like pyro or looped supplies and in some instances will replace FOC.

Andy™ · Jun 10, 2019

is this DNO's cable?

benselectrics · Jun 10, 2019

Not a looped supply or DNO's cable. The meters are outside and the MICC cables are the consumer tails.

Andy™ · Jun 10, 2019

benselectrics said:
Not a looped supply or DNO's cable. The meters are outside and the MICC cables are the consumer tails.

replace with SWA?

Evans Electric · Jun 10, 2019

I can do them but also 100 miles away . As Andy says , replace , 3H10 would be equal to 16mm SWA

benselectrics · Jun 11, 2019

Andy™ said:
replace with SWA?

Thanks. I'll suggest it.

Evans Electric said:
I can do them but also 100 miles away . As Andy says , replace , 3H10 would be equal to 16mm SWA

Thanks

benselectrics · Jul 10, 2019

Evans Electric said:
I can do them but also 100 miles away . As Andy says , replace , 3H10 would be equal to 16mm SWA

Hi Evans Electric. My client still wants to stick with the MICC cable. To be fair to him replacing the feed to his house would mean taking up the front yard paving and chasing to the consumer unit in his recently decorated house.

Interested in a day trip to London?

Evans Electric · Jul 10, 2019

I'm not to be honest Bens , I have certain responsibilities at home . If your job was in the Midlands I wouldn't mind helping out but travelling around the country these days is something I don't relish . 133 miles Norh Brum to Herne Hill

Youtube shows MICC being terminated , its not difficult to be honest . Just buy a crimping tool to crimp the seal into the pot ,don't bother with the other tools, you can strip the copper sheath with a long flat blade screwdriver and ring the sheath with a plumber's copper tube cutter . ( Very carefully though )

As SWA , slide the shroud on .

Then the gland.

Decide length of tails.

Strip up to your indent mark & peel off.

Screw pot on , it has a self tapping thread.

Look inside pot for any stray brass "hairs " from the screwing .

Do not blow into pot .

Slide on the 2 or 3 core stub seal but stop  25mm from pot keeping cores nice & straight .

Take the compound stick from your trouser pocket (where you should have put it at the start )

Push compound in pot from one side only .

Slide your brand new crimper down the cores , hook onto pot & crimp seal into pot . Remove crimper.

Slide on over sleeving .

Megger at 500V between cores & to sheath .

Identify conductors and continue as SWA  .

You can do it , you're a sparks , we can do anything !!!!

kerching · Jul 10, 2019

That CAD system is getting better!

Andy™ · Jul 10, 2019

Evans Electric said:
I'm not to be honest Bens , I have certain responsibilities at home . If your job was in the Midlands I wouldn't mind helping out but travelling around the country these days is something I don't relish . 133 miles Norh Brum to Herne Hill

wish i only had to do 133 miles tomorrow

Evans Electric · Jul 10, 2019

Andy™ said:
wish i only had to do 133 miles tomorrow

Sod that Andy , little joy in driving any distance these days .

Sidewinder · Jul 10, 2019

I could, and wouldn't mind, until the client got my price!

However, I am currently 882km away according to Google Maps if I drive!

But, I would have to go home first to get my van, and go to the workshop and get the pyro tools, then drive up to London, so that makes it over 1500km.

I don't think Mercedes Benz would be happy about me leaving before finishing the inspection of their machine either.

My flight isn't until Friday afternoon home!

So not practical for me, again booked up busy next week, then booked to go off to China for a week, might be able to do some time toward the start/middle of August...

Evans Electric said:
Sod that Andy , little joy in driving any distance these days .

Jono Pashley · Jul 10, 2019

Sidewinder said:
I could, and wouldn't mind, until the client got my price!

However, I am currently 882km away according to Google Maps if I drive!

But, I would have to go home first to get my van, and go to the workshop and get the pyro tools, then drive up to London, so that makes it over 1500km.

I don't think Mercedes Benz would be happy about me leaving before finishing the inspection of their machine either.

My flight isn't until Friday afternoon home!

So not practical for me, again booked up busy next week, then booked to go off to China for a week, might be able to do some time toward the start/middle of August...

That'll be why it was nice and quiet in Fforestfach today then well until i got there

Evans Electric · Jul 11, 2019

kerching said:
That CAD system is getting better!

Yes, Had computer converted from natural gas to this new fangled ' lectric. & got rid of that old 405 line Echo TV that served as a monitor , can't get the valves these days but I do miss that disappearing down to a dot when you switch off ...and that disembodied BBC voice that reminded you to switch off & wished you a good nights sleep .

Evans Electric · Jul 11, 2019

Sidewinder said:
However, I am currently 882km away according to Google Maps if I drive!

I thought it was quiet in Britain this week !!!! :C ;C :c :C : C Naw doesn't always work Brian,s lost in the ether again :C yep he's gone !!

benselectrics · Jul 12, 2019

Evans Electric said:
I'm not to be honest Bens , I have certain responsibilities at home . If your job was in the Midlands I wouldn't mind helping out but travelling around the country these days is something I don't relish . 133 miles Norh Brum to Herne Hill

Youtube shows MICC being terminated , its not difficult to be honest . Just buy a crimping tool to crimp the seal into the pot ,don't bother with the other tools, you can strip the copper sheath with a long flat blade screwdriver and ring the sheath with a plumber's copper tube cutter . ( Very carefully though )

As SWA , slide the shroud on .

Then the gland.

Decide length of tails.

Strip up to your indent mark & peel off.

Screw pot on , it has a self tapping thread.

Look inside pot for any stray brass "hairs " from the screwing .

Do not blow into pot .

Slide on the 2 or 3 core stub seal but stop  25mm from pot keeping cores nice & straight .

Take the compound stick from your trouser pocket (where you should have put it at the start )

Push compound in pot from one side only .

Slide your brand new crimper down the cores , hook onto pot & crimp seal into pot . Remove crimper.

Slide on over sleeving .

Megger at 500V between cores & to sheath .

Identify conductors and continue as SWA  .

You can do it , you're a sparks , we can do anything !!!!

View attachment 10118

Leonardo da Vinci! Thanks a million for the explanation. Very much appreciated.

I've watched it on YouTube and it does seem temptingly do-able. My hesitation is that the cables are in this condition. Far from brand new, and definitely not classroom conditions. Given that I can't afford to get this wrong do you still think it's worth a shot?

Evans Electric · Jul 12, 2019

The stuff is as tough as old boots , possibly the best cable ever made , . Don't kink it sharply . Give it a go . It's definitely a metric size is'nt it ? You'll have to buy a pack of 10 glands etc . Snip off the live core an inch shorter , save identifying later .

Geoff1946 · Jul 12, 2019

I agree it's not that hard to do. I was only shown once how to do it, when I, "won", a load of stripped out 2H2.5 from work and later rewired my garage and outbuildings with it.

Have a practice at ringing and stripping the excess length to check that the cable is still in a fit condition to be re-used.

No purchase needed, and if the copper has become too hard to work then an alternative solution has to be found!

Don't however leave the open end unprotected for long as it absorbs moisture from the atmosphere, then it is knackered.

Extending MICC cable

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