conduit work

[HENRY]

to bend to measure[doing it in one length of tube] its about1/knowing your front of bend and back of bend marks .2/accurate measuring3/sliding bevel for your angles,sets.4/ holding tube level in bender when bending.been doing it 40 years old skool jib spark .oh yer and now your mark on former for slippage.

 

[john h owen]

to bend to measure[doing it in one length of tube] its about1/knowing your front of bend and back of bend marks .2/accurate measuring3/sliding bevel for your angles,sets.4/ holding tube level in bender when bending.been doing it 40 years old skool jib spark .oh yer and now your mark on former for slippage.

That is Interesting Henry. So say if you offset for a 20mm galv conduit is 30mm from the back of the saddle to the front of a hole going into a dist board or 50mm from the back of the saddle to the back of the hole in dist board
How would you measure the front and back of the bends, and how would you use the sliding bevel?

 

[john h owen]

Oh and I forgot marking former for slippage

 

[the pict]

I do a bit of refrigeration installation work where the less joints the better, ok its soft copper and fairly easy on the small bore stuff, but I can still end up with what looks like an illicite still I have been shown how to to it but at the end of the day its down to how you can see the final 3D in your minds eye something the girls are better at that the guys, apparently something to do with predatory threat to the young and being able to see all possible ways out, all seems a bit freudian to me
Pict

 

[Knobhead]

As pict said you have to picture the install in your mind.
One of the main things is to sort out the runs first there’s nothing worse than a new install with conduits leap froging over each other.

As for the rest of his post, eeerrm, I’m not to sure!

 

[bugsy]

I have not read all the threads so might be repetative,
Buy a bundle of conduit and hire a Hilmor.
Practice practice pratice and be thankfull no one's kicking your arse every time you mess it up ( although it does speed up the learning process)

 

[the pict]

get some off cut 15 and 22 mm copper from a plumber and practice on that
Pict

 

[mackers]

u seen the price of copper no plumber gonna part with any copper!LOL

 

[snowhead]

Recipe for a Conduit sledge;

2 lengths of galv conduit, black would do tho.

Bends required;

Start from the middle, 2 x 90 bends,

then 2 x 45 (or 135 depends how you view it)

then 2 x 180 so the ends touch between the 90's and 45's

Repeat using other length.

Find the pipefitter, get him to weld them both up.
Leave one with him for his trouble.
Distract joiner, nick some of his offcuts of wood, he can make his own timber sledge, he didn't need us and the pipefitter.

If you could bend a sledge, 1/4" sets on 3/4" tube (yes that long a go) for switch and socket boxes were nothing.

 

[ipf]

u seen the price of copper no plumber gonna part with any copper!LOL

Only offcuts. You could always give it back when you've finished, still the same weight. Not my idea of conduit practice though.

 

[Knobhead]

Copper and conduit, two different animals.
Copper doesn’t spring back like conduit, you have to gauge how much to over bend.

It’s not possible to describe on a forum how to do a set or any bend. It’s one of those things you only learn by doing it.

 

[ipf]

Yep. Practice makes perfect. But once you can handle it you tend not to forget.

 

[fadox21]

Practise makes perfect, if you mess up a bend keep it to the side and you may need it down the line as a off cut save buying a new bundle!

 

[HENRY]

reply to john.bevels useful for mirroring sets on multiple runs and saddle sets;also to find any difficult contours you might have to run tube on.slippage is about accurate bending ;if your bending at say 250mm back bend you want it to come out that way.in order to do this you must know your bender.ie the front of bend mark on the former;there are often half a dozen marks put on the former by previous users on sites.you do a test bend at 250mm ,if it comes out more or less than 250mm ;thats slippage;either allow for it or remark the former accordingley.re your double set its knowing front of bend ,back of bend ;works for me .regards

 

[shanky887614]

No wonder no one knows how to bend tube any more, Now when you take your AM2, all the containment is fitted for you, all you do is wire. I was an apprentice to an 'old boy' he never wanted any slip marks on the tube. The good old days, were it was it needs to be neat, not 'it will do'.

so no one ever showed the trick of file, then treflex wiped with rag on pipe makes it disappear . i remember being shown that trick. i was shown the proper way to bend tube by a plumber during first year off level 2 electrical. im thankful to the college now that made us do lvl1 plumbing as well as electrical. made life a lot easier now that ive started apprenticeship after ive done level3