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GM0CSZ > POWER 03.07.03 00:37l 35 Lines 1449 Bytes #999 (0) @ WW
BID : 6B1443GM0CSZ
Read: DB0FHN GUEST OE7FMI
Subj: Re: why fuse -ve ?
Path: DB0FHN<DB0RGB<OK0PPL<DB0RES<ON0AR<IK1ZNW<GB7CRV<GB7FUR<GB7IOM<GB7SAN<
GB7INV<GB7NOS
Sent: 030630/1121Z @:GB7NOS.#76.GBR.EU #:17932 [Golspie] FBB7.00i $:6B1443GM0CS
From: GM0CSZ@GB7NOS.#76.GBR.EU
To : POWER@WW
VK6HGR wrote:-
> I have always thought this is fine, but perhaps I'm missing something
> here. Any fault condition that would case the unit to draw more current
> than it is supposed to, would blow the postive rail fuse. Is fusing the
> negative line designed to protect against wiring faults as well as faulty >
gear? Or something else.
> I have always thought this is fine, but perhaps I'm missing something > here.
> Any fault condition that would case the unit to draw more current than it >
is supposed to, would
blow the postive rail fuse. Is fusing the negative > line designed to
protect against wiring faults as well as faulty gear?
> Or something else?
===========
Indeed the reason for 2 fuses, 1 each in both the positive and negative
lead is important in systems where other high current devices are used
,like motor vehicles and boats. This to prevent that in the event of a
earth/wiring fault a excessively high current would flow through the leads
to the radio.
In a domestic situation with a dedicated power supply for the radio(s) , a
single fuse in the (usually) positive lead is sufficient.
73 - Frank , GM0CSZ @ GB7NOS.#76.GBR.EU
Inver by Tain , IV20 1RX Scotland UK Loc: IO87AT
e-mail: gm0csz.kn6wh@ntlworld.com
They say the future is bright ; 2 of its challenges being RENEWABLE ENERGY
and LINUX.
Message timed: 11:11 UTC on 30 Jun 2003
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