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#18518 - 12/10/02 05:00 PM Metric or English?  
CTwireman  Offline
Joined: Feb 2002
Posts: 840
Connecticut, USA
I didn't want to threadjack Trumpy's Conduit size thread, so I'll ask here.

Metric or English? Pros and Cons.

International opinions welcome. We all know where you stand, Paul. [Linked Image]


Work Gear for Electricians and the Trades

#18519 - 12/10/02 05:48 PM Re: Metric or English?  
Electricmanscott  Offline
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
Old tricks? Metric...yuck.

#18520 - 12/10/02 05:52 PM Re: Metric or English?  
sparky  Offline
Joined: Oct 2000
Posts: 5,308
i just can't think metric
[Linked Image]

#18521 - 12/10/02 06:39 PM Re: Metric or English?  
Wirenuttt  Offline
Joined: Nov 2002
Posts: 267
I'd hate to see the whole code book change to metric. Sometime it may happen though.

#18522 - 12/10/02 09:33 PM Re: Metric or English?  
CanadianSparky  Offline
Joined: Mar 2001
Posts: 85
Alberta Canada
Most of our drawings are coming from the architects in metric up here now. In our 1998 code book our section on explosion-proof changed to something more inline with european equipment, so its almost becoming inevitable. When the big rush was on for the 1998 Calgary Olympics everything was metric try finding replacement parts for this stuff now.

#18523 - 12/10/02 10:00 PM Re: Metric or English?  
The Watt Doctor  Offline
Joined: Dec 2001
Posts: 435
Mont Belvieu, TX
I have a hard time with the idea of calling a suppier, and asking them to send me 500' of #21 emt. Or telling an apprentice to get a bundle of 16 out of the back of the truck.

English, mate,

The Watt Doctor
Altura Cogen
Channelview, TX

#18524 - 12/11/02 12:48 AM Re: Metric or English?  
sparky66wv  Offline
Joined: Nov 2000
Posts: 2,236
West Virginia
Ask for a bundle of 16, and you'll probably get a tangled handful of fixture wire!

[Linked Image]

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5 Star Inspections
Member IAEI

#18525 - 12/11/02 06:43 AM Re: Metric or English?  
C-H  Offline
Joined: Sep 2002
Posts: 1,497
Stockholm, Sweden

I can't see any reason for using the other strange units. How do you answer a simple question like:

"What is the resistance of twenty feet of #14?"

"Oh, that's easy" you go "I'll just look it up in a table" and walk off to find that table.

Had it been in metric the only thing you need to know is the resistivity of copper (0.017 ohm mm2/m)

"What is the resistance of 6 m of 2.0 mm2?"

"Oh, that's easy", I go, "6 times 0.017 over 2.0 is roughly 0.05 ohms"

I'm an engineer and many of our books in class (here in Sweden) were American, using strange units like the British Thermal Unit. In my world heat is measured in Watts, without need for a special unit.

[This message has been edited by C-H (edited 12-11-2002).]

#18526 - 12/11/02 08:27 AM Re: Metric or English?  
Redsy  Offline
Joined: Mar 2001
Posts: 2,056
Bucks County PA

#18527 - 12/11/02 09:34 AM Re: Metric or English?  
Texas_Ranger  Offline
Joined: Dec 2001
Posts: 2,393
Vienna, Austria
Doc, you wouldn't ask for 500', you'd ask for 166 m of #16.
Or if metric units are seriously adopted you'd probably ask for 150 m of 16mm conduit.
No. it just depends on what you're used to. I'll never ever get 'round to think in feet and inches, I always convert. However, I think metric is more logical and it's according to the decimal system. i guess here in Austria 200 years ago here in Austria no one thought of metric units. Nowadays the only things that still come in inches are plumbing pipes and sometimes lumber. It's not official, but in every shop you still buy 3/4" gas pipe or 1/2" garden hose. But elsewhere? Wires are 0.75, 1, 1.5, 2.5, 4, 6, 10 and more mm2, conduit (PVC only here) is 16, 20, 25, 30, 40, 50 and more mm.
Guess if America should ever adopt metric cable sizes, the typical 15A circuit would be wired with 2.5 mm2.

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