[54389] in North American Network Operators' Group
Re: DC power versus AC power
daemon@ATHENA.MIT.EDU (=?ISO-8859-1?Q?M=E5ns_Nilsson?=)
Sun Dec 29 17:17:02 2002
Date: Sun, 29 Dec 2002 22:07:08 +0100
From: =?ISO-8859-1?Q?M=E5ns_Nilsson?= <mansaxel@sunet.se>
To: nanog@merit.edu
In-Reply-To: <Pine.LNX.4.44.0212290033030.12785-100000@redhat1.mmaero.com>
Errors-To: owner-nanog-outgoing@merit.edu
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- --On Sunday, December 29, 2002 00:46:56 -0500 jlewis@lewis.org wrote:
> Does anyone actually wire up=20
> both the A side and B side to a single DC power supply and use diodes to=20
> keep the two supply grids separate?
We've built a number of "joiner" boxes in-house at KTHNOC; basically an
aluminium box with rectifier bridge and heatsink, and screw terminals.=20
We use them for 2511 terminal servers and similar. So, yes.=20
> DC also avoids bulky AC power cords...and not only are the wires less
> bulky, but you'll likely cut them to the actual length needed. Since DC
> wiring is usually screwed down, they don't get bumped or accidentally
> pulled out of the outlets as often.
YMMV, but 4 times 2x10mm=B2 + 16mm=B2 PE (The DC connects for a 12n16 GSR) =
I
find bulkier than 4 10A power cords ;-). You are right on spot about the
tidy/sturdy part, though.=20
- --=20
M=E5ns Nilsson Systems Specialist
+46 70 681 7204 KTHNOC MN1334-RIPE
We're sysadmins. To us, data is a protocol-overhe
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