speaker wire ?

amplifiers, receivers and loudspeakers
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JoeE SP9
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Re: speaker wire ?

Post by JoeE SP9 » 06 Aug 2018 01:30

cafe latte wrote:
JoeE SP9 wrote:There's no CCA wire in hospitals.
Why would a hospital have CCA wire (copper clad aluminium wire) It is cheap rubbish for low power systems?
Chris
Cheap rubbish, well, duh! FWIW it's not necessarily about low or high power. It's about reliability. CCA is not as physically reliable as pure copper. Reliability is all important in the medical field. Retired biomed engineer speaking.

aardvarkash10
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Re: speaker wire ?

Post by aardvarkash10 » 06 Aug 2018 05:24

cat into the pigeon coop...

HV transmission wire is typically aluminium.

*runs away laughing...*

poutrew
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Re: speaker wire ?

Post by poutrew » 06 Aug 2018 05:49

aardvarkash10 wrote:cat into the pigeon coop...

HV transmission wire is typically aluminium.

*runs away laughing...*
Some of that HV transmission line is running 60 kilovolts for miles and miles, and at that voltage all of it is running on the very outside surface of the wire due to the skin effect - and the frequency of that AC line is always 60 Hz...

cafe latte
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Re: speaker wire ?

Post by cafe latte » 06 Aug 2018 07:11

aardvarkash10 wrote:cat into the pigeon coop...

HV transmission wire is typically aluminium.

*runs away laughing...*
Yes, but as said above it is not reliable, many high rise flats were wired with aluminium in the old days and corrosion and cracking of conductors caused all sorts of issues. Just about all in the UK at least has now been replaced with copper. It also has high resistance too which is not great. My comment was re it might be ok for lower powered systems was a reference to resistance and for sure systems not critical like in a hospital. Not sure how we got onto aluminium wire we were talking normal copper wire in hospitals etc not junk aluminium.
Chris

aardvarkash10
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Re: speaker wire ?

Post by aardvarkash10 » 06 Aug 2018 08:17

cafe latte wrote:...Not sure how we got onto aluminium wire we were talking normal copper wire in hospitals etc not junk aluminium.
Chris
I figured we had drifted so far off topic "wtf" rules now applied.
poutrew wrote: Some of that HV transmission line is running 60 kilovolts for miles and miles, and at that voltage all of it is running on the very outside surface of the wire due to the skin effect - and the frequency of that AC line is always 60 Hz...
Well. around 8mm deep anyway, at 60hz. I guess it depends how you define "skin".

Point well made though - a couple of hundred miles of aluminium wire is hardly going to be mitigated by several feet of wire blessed by the latest audiophool deity regardless of its composition.

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