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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: DC power versus AC power
Absolutely. Often, there are more than a few hundred amps available. Remember, many of those switch rooms were built to specs to drive a very large number of solenoids, relays, etc. All relatively high-current devices compared to today's solid state stuff. Alot of the specs were never reduced, the rooms just got bigger, and the number of customers. There's a reason the backbone is multiple copper plates and not just wire. Owen --On Sunday, December 29, 2002 5:40 PM -0800 Scott Granados <[email protected]> wrote: Is 48V DC at the amps present normallyin switch rooms etc enough to cause electricucian? I have seen bad things with wrenches dropped across batteries even 12 volt car batteries although in this case it was a large battery bank in a submarine but I was curious about the 48V sources in switch rooms. ----- Original Message ----- From: "David Lesher" <[email protected]> To: "nanog list" <[email protected]> Sent: Sunday, December 29, 2002 4:43 PM Subject: Re: DC power versus AC powerUnnamed Administration sources reported that Michael Painter said: > > > > > > But, as Stephen already eluded to... Compared with an AC plantdesign, to> me, one of the biggest drawbacks of a DC plant is safety (I have had > to kick a fellow worker away from the rack before). << > > What was the worker doing? Is this 48 VDC? Bet so. And note, it's not just ISP's, of course. I heard that Sprint PCS ha[s,d] a Dallas tech in critical condition and a dead switch after a dropped wrench & resulting fire. In the words of Phil Esterhaus: Let's be careful out there.... -- A host is a host from coast to [email protected] & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433
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