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RE: Electrical wiring query

To: "'Keith Kaplan'" <keithka@microsoft.com>, Shop-talk@autox.team.net
Subject: RE: Electrical wiring query
From: "PHINNEY,HARRY K (HP-Corvallis,ex1)" <harry_phinney@hp.com>
Date: Mon, 11 Mar 2002 15:39:35 -0800
Warning: I'm no expert!

Keith Kaplan wrote:
>  Isn't THHN the most common insulation type, and doesn't the 
>  chart show
>  55 amps being the max for 8 gauge at normal temperatures?  What am I
>  missing? 

I _think_ that's for individual wires run in conduit or other type of
"raceway", and that Romex-style cable is down-rated some, but I'm far from
certain. I also _think_ that 6 gauge copper Romex can be used up to 60 amps,
but again I'm not sure. One of the few things I _know_ is that 6 gauge Romex
passed inspection in Oregon with 50 amp breakers :-)

Harry Phinney

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