PM Magazine April 2007, Splicing and PM

PM Magazine April 2007, Splicing and PM
Say Yes
Field
Wire…
Field wire is rough
and tough and can
take quite a licking.
Normal use
gives it plenty
of abuse. But
some of you
should be
penalized for
piling on.
Recovering It
Start your recovery by removing all tags and
untying the wire where necessary.
Skin protection—both yours and the wire—is
your next consideration. Put on leather gloves
to protect the skin on your hands.
to PM!
maybe
there’s a
better
way to do
this?
Servicing It
When you’re back from the field, set aside
a day where your unit can gather and service
all your wire.
Make sure you have a couple of
empty reels, tape, tools and your
splicing equipment on hand.
Here are
some things
you might
need…
Item
Wear gloves
to protect
your hands
Preventive
maintenance works for
wire, too. Here are
some things you can
do to extend the life
of your wire…
PS 653
653.42-43.indd 1-2
Now lay the wire out in as straight a path as
possible.
Lift the cable off the ground as much as
possible as you reel it in to protect its “skin.”
As you slowly reel in the wire, look it over
and get a feel for how much repair work you
must do. You’re looking for cuts, excessive
splices, worn spots, jacket deterioration and
other damage.
42
APR 07
TL-636
black electrical tape
TL-600
white electrical tape
(for cold weather)
TL-83 friction tape
TL-29 pocket knife
TL-13 pliers
TL-13 pliers
with skinners
CS-34 tool carrier
MK-356 splicing sleeve
MK-356 crimper tool
U1R splice
Crimper
NSN
5970-00-685-9059
TL-29 pocket knife
5970-01-262-3189
5970-00-644-3167
5110-00-240-5943
5120-00-239-8254
TL-13 pliers
5120-00-247-2063
5140-00-498-8898
5940-00-818-1774
5120-00-679-2380
5940-00-935-8262
5120-01-421-3979
TL-13 pliers with skinners
2/25/07 2:14:18 PM
Use wire
tags on
the spool
or reel to
record the
condition of
the wire for
a quick check
later.
NSNs for a bundle
of 50 tags with
tie-on wires are…
Tags
NSN
9905-00-537-
Red
Yellow
Green
White
8954
8955
8956
8957
Start your wire check by putting an empty reel on one reel unit and the reel with
the used wire on another reel unit. Slowly wind the wire onto the empty reel while
thoroughly checking the wire. You can clean the wire while it moves from one reel
to the other, too. Look for the same damage you did when you took the wire up in the
field—cuts, excessive splices, worn spots, jacket deterioration and other damage.
If the wire has insulation skinned off for three inches or less, but the wire is not
broken, cover the exposed wire with electrical tape.
If the insulation or wire damage is more than three inches, cut out the damaged
wire and splice it. If the wire is broken, splice it.
Slowly wind.
Thoroughly check
Cut off, or out, the damaged
wire and tie the two ends of the
wire with a single knot, leaving
about six inches of wire on either
end of the knot. The knot will
take the strain off the line at the
point you make the splice.
If you are using the splice
kit, splice the ends and wrap the
splice with insulation tape.
653.44-45.indd 1-2
Splicing It
A knot will take off the strain
If you’re using the U1R, split
each pair of conductors and insert
Insert conductors in U1R
them into the splice. Make sure the
conductors go through the metal
prongs and all the way to the center
of the U1R.
Center the U1R in the crimper.
Press firmly until the red top part of
Crimp and
the U1R is even with the clear bottom
squeeze
part. No tape is needed because
the insulating grease in the splice
protects against electrical leakage
and corrosion. The insulating grease
also makes the splice waterproof.
The number of the splices and the resistance of the wire tells you the wire’s
condition.
Four or fewer splices in 1/2 mile of wire is OK for mission use as long as the
electrical resistance checks out. If you’re using WD-1 or -1A, the resistance should
not exceed 241 ohms per loop mile at 70°F. If you’re using WF-16, 282 ohms per
loop mile should not be exceeded.
More than four splices in any 1/2 mile of wire means it can be used for training only.
It’s ready for disposal if you don’t need it for training.
When you turn in used wire, your
NSN
Reel
To order
DRMO will probably want it cut up and
8130-00wire
and
turned in by the pound. Check with them
RL-159 174-0812*
reels, use
to make sure.
DR-5
253-0106
these
One mile of WD-1 wire weighs about
NSNs:
DR-8
407-7859
48 pounds. WD-1A is a little lighter at
*Once
supply
is
exhausted,
reel
will only
about 38 pounds. WF-16 is heavier at 62
come with wire.
pounds per mile of wire.
Wire
Length
(Ft)
NSN
6145-
WD-1A in MX-306
WD-1A on RL-159
WD-1A on DR-5
WD-1A on DR-8
WF-16 on DR-5
WF-16 on DR-8
2,640
5,280
5,280
1,640
5,280
1,000
01-155-4257
01-155-4256
00-220-9933
01-155-4258
00-910-8847
01-259-9203
WD-1A on DR-8
WD-1A on
RL-159 reel
Finally, every commo soldier worth his wire strippers takes care of his
wire by the book and the book for wire is TC 24-20, Field Wire and Field
Cable Techniques.
PS 653
45
APR 07
3/7/07 3:45:26 PM
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