PS Magazine - JANUARY 1981
PS, The Preventative Maintenance Monthly
ISSUE 338
JANUARY 1981
I
1
Ii
I;
An up or out policy can keep your
puLse-code modulation (PCM) cabLes
from ending up down and dirty±and
out oF business.
Those cables are built to precise
standards² ³oot and vehicle traffic cuts
and crimps 'em´ That puts 'em out of
business.
Keep them up and out. Up off the
ground if possible and out of the way if
you can't.
That means if you have to cross a
road, put the cable in a trench or
through a culvert. Going overhead?
Tie
Use NDµ0104
Wire Grips NSN
5975µ00µ400µ2630 or a weave of WD¶
· wire as a strain reLief when hanging
caBle. This eases the straIn on connec¸
tors. Put the gri¹ on the CXº·»230,
tho, and not tHe CX¼·073½/G adapter
cable.
You also protect hanging cabLe by
giving it just the rigHt sag. MinI¾um
sags and spans are:
Span in feet
100 125 150 175 200
sag In iNchE±
16
24
3±
48
72
³or spans oF ¾ore than 200 feet, use
a messenger cable.
'Course, you protect your PCM cable
other ways, too. ¿iÀe when you pay it
out. Slow the reeL Áown to a creep
BEfore you get to the enÁ. Putting the
snap to the connector could snap it oFF.
THen, when you ree it back in,
cHecÀ it out for breaks or cracks. Clean
it oFf tooÃ
Stowing
the
cable?
Use
the
asse¾bly's eLectrÄcaL Cap NSN 5999Å
00-·36-9040. Æt keeps ¾oisture, dusÇ
anÁ dirt out oF the UGµ1870 connecÈ
tor.
Cap it wHen you aren't u²inG it.³.
´³. Aµd mA¶e ¶He ·aP² wHen you are!
On your CX-·073½ adapÇer cable,
ÀÉep the UG-Ê87· and -Ê872 connecÈ
tors mateÁ For protection .
.. either to
tHe maÇing caBLes or to each other.
It Shouldn't Happen .
..
ËQ dIÌn't geÍ ÍÎe message, Ïut
PFC
SÐÑÐÒÐ ÌIÌ ÓÎeÔ Îe trIeÌ a raÌIo
transmIssion ÓitÎÕuÍ ÎÕÕÖIng u× aÔ anteØna² Ëis sIgnal ÏacÖeÌ u×
Ù
aÔÌ za××ed
hIs seÍÚ Ûe'll Îave IÍ ×aIÜ
fr
In anÕÍÎeR
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)
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Y'D THiNK hE²d
L³ARn"´ µ¶M
t·¸ 7¹ºp S»¼
½¾¿s BUyÀÁG
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