Voltage Issues with 3600 Routers and 2900 Switches

Discussion in 'Cisco' started by Ed, Jan 15, 2004.

  1. Ed

    Ed Guest

    We're moving our equipment to a new server room. We have five 3600
    routers (three are 2U and 2 are 1U) and five 2900 Catalyst switches
    (four are 2900 series XL and one is a 2950 series). They are
    currently using 120VAC. The power circuits in the new room are
    208VAC. We'd like to use that. Otherwise we'll have to call in the
    electrician. Can this be done with these routers and switches? Any
    potential problems? Do we just plug them into the higher voltage?

    Ed
    Ed, Jan 15, 2004
    #1
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  2. In article <>,
    Ed <> wrote:
    :We're moving our equipment to a new server room. We have five 3600
    :routers (three are 2U and 2 are 1U) and five 2900 Catalyst switches
    :(four are 2900 series XL and one is a 2950 series). They are
    :currently using 120VAC. The power circuits in the new room are
    :208VAC. We'd like to use that. Otherwise we'll have to call in the
    :electrician. Can this be done with these routers and switches? Any
    :potential problems? Do we just plug them into the higher voltage?

    http://www.cisco.com/univercd/cc/td/doc/pcat/3600.htm

    Input Voltage, AC | 100-240 VAC, autoranging | Same as Cisco 3620 | Same as Cisco 3620

    http://www.cisco.com/univercd/cc/td/doc/pcat/ca2900.htm

    100 to 120/200 to 240 VAC (autoranging) 50 to 60 Hz

    http://www.cisco.com/en/US/products...stallation_guide_chapter09186a008007eaec.html

    100 to 127/200 to 240 VAC (autoranging) 50 to 60 Hz


    So you should be able to just plug them in provided you get the right
    cords.


    I'd suggest, though, that a different approach might be better.
    The 2U sound like 3640A, 140 Watt, and the 1U sound like 3620, 60 W.
    The 2900xl are mostly 70 W each. The 2950 are 30 W - 45 W depending
    on the model. The total is 865 Watt, about 1250 Volt Amps (VA).
    Allowing for other equipment and future expansion, I would suggest you
    get a nice 2 kVA UPS with a 208 V input and either 208 V or 120 V output.
    Depending on the battery lifetime you wanted, you could probably get
    something good for about $US2000 or so. I believe Powerware and APC
    make appropriate models. Though at 2 kVA, you might find that you
    need a 30 A circuit, so the electrician might still be needed.
    If I remember correctly, I found some Powerware models up to 1250 VA
    that were able to use standard 20 A, but I was looking for 120V,
    not 208V.
    --
    *We* are now the times. -- Wim Wenders (WoD)
    Walter Roberson, Jan 15, 2004
    #2
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  3. Ed

    Ed Guest

    Thanks, Walter. Actually the circuits in the new room are all 208V,
    30A already. And they are behind a big APC Symmetra UPS. So we don't
    want to put another UPS in but just a PDU and hopefully a 208V one. I
    saw the 100 to 240 VAC autoranging but wasn't sure whether there were
    other issues like config. options, etc. Thanks again.
    Ed, Jan 16, 2004
    #3
  4. Ed

    Peter Guest

    Hi Ed,

    Ed wrote:
    > Thanks, Walter. Actually the circuits in the new room are all 208V,
    > 30A already. And they are behind a big APC Symmetra UPS. So we don't
    > want to put another UPS in but just a PDU and hopefully a 208V one. I
    > saw the 100 to 240 VAC autoranging but wasn't sure whether there were
    > other issues like config. options, etc. Thanks again.


    For what its worth, power here in NZ is 230v 50Hz (varies between 222v
    - 238v worst case), and all our Cisco gear runs fine using standard
    Cisco 100 - 240 power supplies. In fact we did a "brown-out" test on
    an older unit and it ran fine down to 96v, so they seem to be very
    tolerant of voltage changes.

    --
    *** Replace SOMEONE with prk ***
    Peter, Jan 16, 2004
    #4
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