Going to the Big Box Store

[ivsenroute]

Forced to go to a big box store because I do not have the capability of threading 2" RMC. Bib box stores will do it, supply houses will not.

for how often I need this, don't see the point in wasting money on more equipment.

Some of you use this on a daily basis, I would guess that most of you may not. What do you do?

 

[mdshunk]

How about buy a hand threader? They're not at all expensive. The 12R will do up to 2".

If I'm threading one or two, I'll use a hand threader. The whole 12R kit fits neatly on the truck, and I keep a tristand behind the passenger's seat all the time anyhow. If I'm on a small job where I'm going to be threading more than one or two, I'll take along a pony threader (700). More than a week's worth of threading and I'll get a stand threader on the job.

 

[SEO]

Also look for a used tri stand vise.

 

[tkb]

You could get a used 12R set of hand threaders on EFence for about $300.

 

[hillbilly1]

The thread pitch is also steeper on the threaders at the big box, they are set up to thread plumbing pipe, works just as good though for the occasional use. Bought a cheap Chinese set (3/8-2") at Harbor Freight for $100 for the occasional use.

 

[B4T]

Last time I needed pipe threaded, I went to the local plumbing supply. It cost $20.00 and I saved time not having to find a sales person who could operate the machine. :grin:

 

[tkb]

The thread pitch is also steeper on the threaders at the big box, they are set up to thread plumbing pipe, ...

Electrical conduit and plumbing pipe are the same thread NPT.

It's just another one of the myths about electrical.

 

[480sparky]

Electrical conduit and plumbing pipe are the same thread NPT.

But a different cut. Electrical is tapered, plumbing is straight.

 

[iwire]

But a different cut. Electrical is tapered, plumbing is straight.

Both are tapered.

NPT stands for National Pipe Tapered Thread

 

[Cow]

But a different cut. Electrical is tapered, plumbing is straight.

What?

Their both NPT. Why do people always think it's a different thread?

EDIT: Forgot to say, before we got a big threader, we used to use an irrigation supply house to thread 3" and above.

 

[480sparky]

What?

Their both NPT. Why do people always think it's a different thread?

It's the same thread pitch & threads per inch, but I always thought plumbing threads had no pitch, where electrical is required to have a pitch.

 

[hillbilly1]

Electrical conduit and plumbing pipe are the same thread NPT.

It's just another one of the myths about electrical.

My school books must have been wrong then, funny how you can easily thread a conduit coupling all the way up, but need pipe wrenches to thread a plumbing coupling up all of the way.

 

[hillbilly1]

The threads per inch are the same, but plumbing pipe has a steeper taper, otherwise it will leak because it can not be tightened down enough before you run out of threads.

 

[jeremysterling]

My school books must have been wrong then, funny how you can easily thread a conduit coupling all the way up, but need pipe wrenches to thread a plumbing coupling up all of the way.

Exactly, the couplings are different, the nipples are threaded the same. That is why you can get a 3000 psi plumbers cplg and you will not find psi on an electrical cplg.

 

[tkb]

The threads per inch are the same, but plumbing pipe has a steeper taper, otherwise it will leak because it can not be tightened down enough before you run out of threads.

WRONG!!!!

The pipe threads are the same, it's the fittings that have a diferent thread.
Plumbing fittings have a tapered thread and electrical fitting have a straight thread.

THE PLUMBING AND ELECTRIACL PIPE HAS SAME TAPERED THREADS.

 

[480sparky]

WRONG!!!!

The pipe threads are the same, it's the fittings that have a diferent thread.
Plumbing fittings have a tapered thread and electrical fitting have a straight thread.

THE PLUMBING AND ELECTRIACL PIPE HAS SAME TAPERED THREADS.

Then 'splain to me what the NEC says in 342.28 and 355.28?

 

[Cow]

Whoa Sparky you're quotin' the wrong guy!

 

[220/221]

I always thought they were different threads. I was taught that they had different threads. The last time I went to have a piece of 2" threaded, the guy asked me if it was for electrical, implying that they were different.

The myth/debate continues.

Every time this comes up I tell myself that I am going to compare things at a hardware store and find out for sure. Then I get sidetracked on some other project.

 

[hillbilly1]

WRONG!!!!

The pipe threads are the same, it's the fittings that have a diferent thread.
Plumbing fittings have a tapered thread and electrical fitting have a straight thread.

THE PLUMBING AND ELECTRIACL PIPE HAS SAME TAPERED THREADS.

Just went to my shop, pulled out a stick of 1/2" ridgid, and a stick of 1/2" galvanized water pipe, took a 1/2" galvanized water fitting and put it on the water pipe, two full turns and it was hand tight. Used the same fitting on the ridgid conduit, and it took three full turns to get it hand tight. Apparently the manufactures are not meeting the taper requirement as if it was the same taper, it should have taken close to the same number of turns.

 

[480sparky]

Whoa Sparky you're quotin' the wrong guy!

Seems to be a Forum-wide problem tonight....