PS Magazine - APRIL 1973
PS, The Preventative Maintenance Monthly
1973 SERIES, ISSUE 245
APRIL 1973
Your ground rod, for good performance, shoulD penetrate the permanent moisture
level, whIch Is usually about 8 feet in tHe UnIted States.
For top-hole effIcIency, ±nstall multIple
ground rods and connect 'em² ³rIve the
additIonal rods around a central rod,
keeping at lea´t 10 feet between the rods²
Connect the addItIonal rods to the central
ground rod w±th burIed copper ground
straps or µ6-gauge (or heavier) copper
wire² Solder or clamp tHe connectIon´.
Use the central rod as the ground±ng
point for equIpment.
HARD EARTH
¶f you·re InstalLIng a rod In rocKy or frozen earth and you've go¸ problems, you
can maKe do by buryIng the rod horIzontally ±n a narrow trench a foot or so wide
and deep¹ ThIs tends to Increase your groundIng effIcIency under dIffiºult cond±tIons²
»f you·re In a bInd, you can rIg up a worKable ground usIng a burIed copper plate
or an underground pIpe, lIKe In a water system, f'r±nstance²
The plate should be at least 9 sQuare feet. Bury It at least 4 feet² A suitable ground
pipe should be at least ¥-±nch ±n dIameter, about 4 feet down.
O·course, the TM·s on specIfIc eQuIpment often spell out the grounding ¼½les for
that partIcular equIpment In defInIte steps² ¾end an eyebalL² ¿eedÀ
2² Ground rod KIt:
ÁHree 3Âfà ´eÄÃIoN´ 5/8±ncH ±N űÆÇeÃeRÈ
É W±tH 3 ÄÊËpL±nÌ´ ÆNÅ Í År±v±NÌ ´ÃÎd (ÏÐÑ
5975ÒÓ4ÔÂ8Õ3 Ö br×NÌ´ ´ect±ÊN´ Ænd
al
HardWareØ plδ ÑoÙ Ó Ú ÛÜ W±Re, Ó fEEÝ
Þ (FSß Óàá5âà8ÕÂãÕ5), ÆnÅ Í eLEÄtR±ÄÆL
ä
cLaåp (ÏÐÑ 5Õ75æÔ43ç58Ó1).
-
,· ±²³´
-
±.²
THe ent±re groËnd rod K±t, coÇpLete w±tH coupL±Ngs, sÃud, w±re, and clamp can be
reQuIsIt±oneÅ w±tH FSÑ 5975Â878Â3Ö91.
Pubs? èoË·Ll f±nÅ aÅűt±onaL groundIng InfÊ ±n FM 24â20 (Feb 70) anÅ FM 24Â18
éuê 65).
4
TH-22 GROUND PRONG StAYS
ëeplacIng your T¿Â5/ìG telegraph
termInal with the Á¿í22î
¾atch onto an adapter plug, FSï
5ðñ5Â081-8ò25, whIch lets you use the
3-prong AC power plug on the ì¿Â22 on
any receptacle wHIcH won·t taKe tHe
ground plugÙ Be sure you ground tHe
adapteró
ïever cut off a grôund prong. You set
up a shocK hazard õö
3-PRONG AC
POWER PLUG
ASW-12 TURN-IN
¿ey, man, ±f yo÷·re about to sH±p your
TGÂ8àA/ ASÛÂÍ2 eLectroÂmechan±cal
actuator bacK to depot wItHout a drum
and bracKet a´´eÇbLy, stand by for aN
FSÑ changeõ
ÛItHouà tHe drËÇ and bracKet, tHe
±teÇ reads l±Ke soø
ServodR±ve a´´eÇbLy, Part ÑÊ.
2585089Â4, FSß 6Óà5Â400Â2ÖÔÓõ
ONly
ù
tHe compLete ±teÇ, electroÂÇeú
cHan±cal rÊtaû acÃÎatoR ÁüÂ8àÚ, Ìets
ÏSÑ àÓ80Â805Â399à.
±5
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