I have to shove THREE service entrance wire cables thru a 3/4 inch metal
pipe. The cables measure 6.5 millimeters each. (1/4) inch = 6.35
millimeters, so they are slightly bigger than 1/4 inch in diameter.
I thought by applying a lot of pressure and using a lubricant I could
force them thru this pipe, but I cant seem to get them in more than an
inch or two.
The pipe is exactly measured at 3/4 inch on the inside. The wires have
to go thru about 20 feet of pipe. I determined that I need to remove
about 10% of the insulation from each cable. I can do this with my belt
sander, but I'm trying to figure out how to get the sander to sand
evenly around the entire diameter of these cables. I cant seem to find
anything made to sand round objects. My father suggested putting the
cables in my wood lathe and just taking off a thin layer off the
insulation, but I cant find a way to mount the cable securely in the
lathe, because it flexes too much.
Does anyone know a better way to remove some of that insulation without
removing too much?
On Thursday, October 8, 2015 at 3:58:28 PM UTC-4, FrozenNorth wrote:
I agree, gotta be a troll.
Still it's an interesting problem.
I wouldn't take the extra off the insulation though. You already have to derate them putting that many in.
Instead, make the pipe bigger. Any pipe with 3/4 ID must have thick walls. So grind away from the inside.
Get a length of aircraft cable and a hand winch. Pull lead slugs through with lots of grinding compound. It will take you a long time with increasingly big objects.
Push a smaller wire thru the pipe, and then use that wire to pull the three wires. The act of pulling the wires will tend to shrink them a little and you just might be able to get the three wires pulled rather than pushed.
On Thursday, October 8, 2015 at 3:27:34 PM UTC-4, email@example.com wrote:
If you compress the pipe it will get wider. I did the math for you.
Compress the pipe down to 19.324' and it should get wide enough to pull the
cables through. Release the compression and it will expand back to it's
As always, let us know if our suggestions helped.
On 10/8/2015 12:24 PM, firstname.lastname@example.org wrote:
Three densely packed circles (cross section) of 6.5mm dia should require a
circumscribed circle of ~15mm in diameter. (I'd have to do the math for
a more detailed answer) I.e., you shouldn't be having a problem unless
your cables aren't *actually* 6.5mm AS YOU ARE PUSHING THEM.
On Thu, 08 Oct 2015 14:24:37 -0500, email@example.com wrote:
It isn't as difficult as you might think. The three cables you're
going to be using, I presume will be 120V, 120V and ground,
respectively, right? So why not just completely remove all the
insulation from the cable that will be used as ground? That would be a
lot easier than trying to remove just a little insulation from all of
When you turn on the power your friends will really be impressed how
you solved your problem.
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