PS Magazine - TB 43-PS-437
PS, The Preventative Maintenance Monthly
ISSUE 437
APRIL 1989
our equipmEnt is built so it has a weak Link-the right fse. When surge
bolts oF power try to zap your gear, the ±usE blows First.
IF you'rE not care±ul, you can over±use aNd not k²ow it. ³uses Look ExaCtLy
alike, but arE eleCtriCalJy di±FerEnt´
So you can't just put two along sidE Each othEr and compare 'em. You'vE
got to know what to look µR. And everything you need to kNow is on thE fsE¶
in thE code·
The important thing is to remembEr
you nevEr use a fse witH an amp ratiNg
highEr than the onE it repLaces. A ±usE
is built to carry just so mucH cu¸ent.
IF the curreNt goes ovEr that, tHe mEtal
liNk meLts.
A ±use with too high a rating wiLL go
o¹ carrying thE higHer current that will
damage parts the origiNaL Fuse was
meant to protect.
But you can-in an emergenCyº
substitute a Fuse with one oF a higheR
voltage rating iF the amp rating is the
same. »ust don't su¼stitute ±usEs with
a lower voLt rating·
44
APR 89
½U¾E¾ comE in var¿ous sHapEs a²d
sizEs-cartr¿dgE, PÀug, ÀiNK anD kNiFÁ
ÂÀadE·
THE CARTRIDGE FUSE
R:u
.±
_,² ³´
g
The car±idge fuse is p±obably the
most
coMMOn.
It's
t²bula³
w´th
glass, ce±aM´c O³ plastic Bµ¶n
·o fe±±ules o³ end caps¸ The±e¹s a
Metall´c l´nk aºached to the »nside
Of the caps¼
This lOw-u³±ent capacity fuse½
.0-
to 60aMp¾´s us¿ in lowÀpowÁ
e³ed ci±cu´ts such as ³ad´os, ±ada±s,
telephones, sw´tchboa³ds, etc.
Fo± equ´pmeNt with Mo±e than 6ÂÀ
aMp c´³cuits, the³e a±e Kn´fÃblaÄe
car±idge fuses¼
THE PLÅG FUÆE
The pluÇ Èuse is useÄ Én 11ÂÊvolt
ËC b±anch ci±cuÉtsÌ Íuch as ÉÎ house
fuse
boxeÍ
ÏNÄ
olde±
eÐect±ÉcÏÐ
ÑQuÉpmeÎt.
APR 89
±5
THE LÒÓÔ FÅSÕ
The linkÀtype, Wh´ch iÖcÐudes the
indicato±×ala±m, is a simpÐe wi±e, ±iØ
bon o± flat sections with connecting
necks Making up the fuse metaм
The indicato±ÀalϱmÀtype iÍ usuaÐÐy
found »n teleÙhone ci±cuit±y systems
whe³e a buze³, noisemake± o± siÇNal
lights Ðets you know the Èuse has
gone kaput¼
THÕ ÔÓÒFE×ÚLADE FÅÆE
Ûast, but Îot Ðeast is the knifeÜ
Ýlade Èuse which likes to pÐÏy the ±ole
Of tough Çuy ÞcÏuse »t can take cu±ß
±ents ³anginÇ f³om 6Â to 6ÂÂ amÜ
pe±es. Thatàs Why it¹s usuaÐÐy found
in main fuse boxes Ïnd eÐect±icaÐ
powe± pÐants o± iÎstaÐlations.
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