It is currently Thu Oct 19, 2017 12:17 am



Post new topic Reply to topic

Is your/client(s) facilities interior wiring mostly copper of aluminium
Copper
Aluminum
It depends/quite a mix
I don't get involved in this area
You may select 1 option

View results
Author Message
ekstra   ara
 Post subject: Copper vs. Aluminium Conductors
PostPosted: Sun Oct 01, 2017 1:04 pm 
Offline
Plasma Level
User avatar

Joined: Mon Sep 17, 2007 5:00 pm
Posts: 1207
Location: Scottsdale, Arizona
This week's question is simple.

Is your/client(s) facilities interior wiring mostly copper of aluminium.

Copper
Aluminum
It depends/quite a mix
I don't get involved in this area


Top
 Profile Send private message  
Reply with quote  
 Post subject: Re: Copper vs. Aluminium Conductors
PostPosted: Tue Oct 03, 2017 5:01 pm 
Offline
Plasma Level
User avatar

Joined: Tue Oct 26, 2010 9:08 am
Posts: 1779
Location: North Carolina
Outdoor/overhead equipment is almost exclusively aluminum or ACSR (aluminum coated/steel reinforced). Indoor equipment is almost exclusively copper. And then we get into silver or tin plating on bus bars, and of course arguments for/against aluminum vs. copper windings in transformers and I've worked with both.

And if this is leading up to the obvious...the scant documentation showing definite differences in the way that aluminum responds compared to copper in terms of incident energy, that doesn't even begin to touch on the fact that the enclosure itself or many lugs might be something other than copper and thus might have a difference response. This is akin to trying to answer questions about equipment configuration within an enclosure since it is known that mostly the equipment absorbs some of the radiant energy and reduces incident energy well below that predicted based on laboratory tests of effectively "open" equipment, with or without "barriers".


Top
 Profile Send private message  
Reply with quote  
 Post subject: Re: Copper vs. Aluminium Conductors
PostPosted: Fri Oct 06, 2017 2:40 am 
Offline

Joined: Mon Aug 04, 2014 5:19 pm
Posts: 4
Outdoor overhead conductor is ACSR and often AA as well. For MV cable applications aluminum has an excellent history as long as the correct connectors are used.


Top
 Profile Send private message  
Reply with quote  
 Post subject: Re: Copper vs. Aluminium Conductors
PostPosted: Fri Oct 06, 2017 10:23 am 
Offline
Plasma Level
User avatar

Joined: Mon Sep 17, 2007 5:00 pm
Posts: 1207
Location: Scottsdale, Arizona
Hi All!

Actually the question was a lot simpler than it appears. I probably should have prefaced it with some introductory information. It wasn't really about arc flash but more about - does anyone use aluminum wiring inside? Of course many older buildings still have it.

This is really based on the 1977 Beverly Hills Supper Club fire just south of Cincinnati, Ohio where the suspected cause was attributed to faulty aluminum wiring. I was a Sophomore in college at the time about 2 hours up the interstate but vaguely remember it. I know home inspections seem to flag aluminum wiring (older homes) as well.

Here is one of many links about the event: http://www.nytimes.com/1985/07/16/us/wiring-was-at-fault-in-supper-club-fire-jury-finds-in-retrial.html

As always, some good comments - always appreciated!

- Jim


Top
 Profile Send private message  
Reply with quote  
 Post subject: Re: Copper vs. Aluminium Conductors
PostPosted: Mon Oct 09, 2017 8:35 am 
Offline
Arc Level

Joined: Tue Jan 13, 2009 5:00 pm
Posts: 422
I think you'd have a hard time finding #10 and 12 aluminum romex style that was used in the receptacle and lighting circuits where the problems occurred.
I dealt with a mobile home that had the stuff. Pretty good charring on the heavier loaded receptacles such as those used for vacuuming and hair drying.


Top
 Profile Send private message  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
© 2017 Arcflash Forum / Brainfiller, Inc. | P.O. Box 12024 | Scottsdale, AZ 85267 USA | 800-874-8883