12 Feb
2002
12 Feb
'02
8:51 a.m.
-----Original Message-----
From: Tothwolf [mailto:tothwolf@concentric.net]
Needless to say, a 20A system (max inrush) running
from a 15A
outlet/circuit just does not seem all that safe. I put the
proper plug on
the cord just this weekend, since I got one in with that
weekends haul.
Well, isn't the breaker on the SGI desksides 16A?
I suppose, in that case, that they'd be relatively safe on a 16A
"air conditioner" circuit, or the like, but 15A is living
dangerously. :)
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl
Hacker.")."\x08!\n");
'
12 Feb
12 Feb
9:28 a.m.
On Tue, 12 Feb 2002, Christopher Smith wrote:
Well, isn't the breaker on the SGI desksides 16A?
It is, but I don't think I want to push the limits that close.
I suppose, in that case, that they'd be relatively
safe on a 16A "air
conditioner" circuit, or the like, but 15A is living dangerously. :)
You won't find a 16A breaker in a branch circuit. You'd likely see a 15A
breaker (residential, probably 14Ga, maybe 12Ga wire), or a 20A breaker
(12Ga or 10Ga wire). A 15A circuit would not be safe at all, while a 20A
*might* be ok, but the system could still overload the receptacle and plug
since they are still only rated for 15A.
SGI actually rated these systems for a dedicated 20A branch circuit.
-Toth
9:41 a.m.
On Tue, 12 Feb 2002, Tothwolf wrote:
You won't find a 16A breaker in a branch circuit.
You'd likely see a 15A
breaker (residential, probably 14Ga, maybe 12Ga wire), or a 20A breaker
(12Ga or 10Ga wire). A 15A circuit would not be safe at all, while a 20A
*might* be ok, but the system could still overload the receptacle and plug
since they are still only rated for 15A.
Wait a minute, isn't the only physical difference between NEMA 5-15 (110V,
15A) and 5-20 (110V, 20A) that one pin is rotated 90 degrees? In this
case, since residential electrical code would mandate wiring capable of
delivering 20A service on a circuit protected by a 20A breaker, wouldn't
you say that the principle reason for NEMA 5-20 existing be to prevent
user error more than anything else?
ok
r.
1:17 p.m.
On Tue, 12 Feb 2002, r. 'bear' stricklin wrote:
On Tue, 12 Feb 2002, Tothwolf wrote:
Standard residential grade receptacles are only rated for 15A/120V use.
They are typically not as well made as the commercial grade 15A/20A
receptacles. I would not be too worried about a 20A or 15A breakered
circuit that used 12Ga wire and a commercial grade receptacle, but chances
are, you won't find that in someone's home. I think it's just easier to
use the proper 20A twist-lock connectors and receptacle and have a
dedicated 20A branch circuit.
-Toth
You won't find a 16A breaker in a branch
circuit. You'd likely see a 15A
breaker (residential, probably 14Ga, maybe 12Ga wire), or a 20A breaker
(12Ga or 10Ga wire). A 15A circuit would not be safe at all, while a 20A
*might* be ok, but the system could still overload the receptacle and plug
since they are still only rated for 15A.
Wait a minute, isn't the only physical difference between NEMA 5-15
(110V, 15A) and 5-20 (110V, 20A) that one pin is rotated 90 degrees?
In this case, since residential electrical code would mandate wiring
capable of delivering 20A service on a circuit protected by a 20A
breaker, wouldn't you say that the principle reason for NEMA 5-20
existing be to prevent user error more than anything else? 
2:56 p.m.
----- Original Message -----
From: "r. 'bear' stricklin" <red(a)bears.org>
To: <classiccmp(a)classiccmp.org>
Sent: Tuesday, February 12, 2002 03:41 PM
Subject: RE: Hubbell twist-lock connectors
You can have NEMA 5-15R devices on a 20A circuit. It's a personal
hypotheses that the only difference between NEMA 5-15R and NEMA 5-20R is the
gripping force of the fingers inside the device. I do know (well, it was
told to me and emperical evidence agrees) that it is the only difference
between the various grades (ie spec & hospital) of devices.
FWIW I do commercial/industrial work, and the only time I've ever run #14 is
for the horn circuit of a fire alarm. Romex? That's called temporary where
I come from! ^_^
On Tue, 12 Feb 2002, Tothwolf wrote:
> You won't find a 16A breaker in a branch circuit. You'd likely see a 15A
> breaker (residential, probably 14Ga, maybe 12Ga wire), or a 20A breaker
> (12Ga or 10Ga wire). A 15A circuit would not be safe at all, while a 20A
> *might* be ok, but the system could still overload the receptacle and
plug
since they are
still only rated for 15A.
Wait a minute, isn't the only physical difference between NEMA 5-15 (110V,
15A) and 5-20 (110V, 20A) that one pin is rotated 90 degrees? In this
case, since residential electrical code would mandate wiring capable of
delivering 20A service on a circuit protected by a 20A breaker, wouldn't
you say that the principle reason for NEMA 5-20 existing be to prevent
user error more than anything else?
ok
r.
Bob
8192
days inactive
8192
days old
4 comments
4 participants
participants (4)
-
csmith＠amdocs.com -
red＠bears.org -
rschaefe＠gcfn.org -
tothwolf＠concentric.net