nanog mailing list archives
Re: L6-20P -> L6-30R
From: William Herrin <bill () herrin us>
Date: Tue, 18 Mar 2014 21:39:46 -0400
On Tue, Mar 18, 2014 at 6:54 PM, Niels Bakker <niels=nanog () bakker net> wrote:
* web () typo org (Wayne E Bouchard) [Tue 18 Mar 2014, 23:53 CET]:I have had to do this at times but it is not strictly allowed by codes and not at all recommended.It's an active fire hazard. The cables aren't rated (= built) for the power draw.
Meh. It depends. Plug that 30 amp power strip into a 20 amp circuit. Try to use more than 20 amps and the main breaker trips. No problem. Plug that 20 amp power strip into a 30 amp circuit. Try to use more than 20 amps and the strip's breaker trips. No problem. Get a short before the strip breaker and the main breaker trips before the wires can heat. There just aren't a whole lot of failure modes here that result in fire short of one or the other breaker failing. And that results in fire regardless of the amperage mismatch. This, by the way, is why you're allowed to plug that 22 gauge Christmas light wire into a 15 amp receptacle even though it can't handle 15 amps: the 3 amp fuse will blow if there's a short. Just don't plug in anything with lower-rated wire that doesn't have its own breaker or fuse. Regards, Bill Herrin -- William D. Herrin ................ herrin () dirtside com bill () herrin us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004
Current thread:
- Re: L6-20P -> L6-30R, (continued)
- Re: L6-20P -> L6-30R Niels Bakker (Mar 18)
- Re: L6-20P -> L6-30R Stephen Sprunk (Mar 18)
- Re: L6-20P -> L6-30R Randy Carpenter (Mar 18)
- Re: L6-20P -> L6-30R Jay Ashworth (Mar 18)
- Re: L6-20P -> L6-30R Laszlo Hanyecz (Mar 18)
- RE: L6-20P -> L6-30R Alex Rubenstein (Mar 18)
- Re: L6-20P -> L6-30R Rob Seastrom (Mar 19)
- RE: L6-20P -> L6-30R Alex Rubenstein (Mar 19)
- Re: L6-20P -> L6-30R Rob Seastrom (Mar 19)
- Message not available
- Re: L6-20P -> L6-30R Larry Sheldon (Mar 19)
- Re: L6-20P -> L6-30R William Herrin (Mar 18)
- Re: L6-20P -> L6-30R Wayne E Bouchard (Mar 18)
- Re: L6-20P -> L6-30R Lamar Owen (Mar 19)
- Re: L6-20P -> L6-30R William Herrin (Mar 19)
- Re: L6-20P -> L6-30R Lamar Owen (Mar 19)
- Re: L6-20P -> L6-30R William Herrin (Mar 19)
- Re: L6-20P -> L6-30R Chuck Anderson (Mar 19)
- Re: L6-20P -> L6-30R William Herrin (Mar 19)
- Re: L6-20P -> L6-30R Jay Ashworth (Mar 19)
- Re: L6-20P -> L6-30R Aaron (Mar 19)
- RE: L6-20P -> L6-30R Alex Rubenstein (Mar 19)