Groups > sci.electronics.design > #461675

Re: Medical devices and US 220V electrics

From	rickman <gnuarm@gmail.com>
Newsgroups	sci.electronics.design
Subject	Re: Medical devices and US 220V electrics
Date	2017-05-25 12:15 -0400
Organization	A noiseless patient Spider
Message-ID	<og6vpb$nad$1@dont-email.me> (permalink)
References	<MPG.3390d8e696dfb651989698@reader80.eternal-september.org>

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RBlack wrote on 5/25/2017 8:05 AM:
> Hi,
>
> We are working on a medical product, which will draw about 3 kW from the
> mains.  This is new territory for us, all our previous products were a
> few hundred watts max so an off-the-shelf auto-ranging PSU with a
> suitable IEC lead was OK for any country in the world.
>
> 3 kW is OK for a standard outlet in 220V countries, but for North
> America, Japan etc we are over the limit for a standard 110V outlet.
>
> I only know as much about US electrical installations as I've read, a
> bit of Googling suggests the product will need a NEMA 6-15 220V outlet.
> But how common are these in hospitals?  Anybody have any experience of
> this stuff?
>
> It has been suggested (not by me I hasten to add) that we split the
> loads within the product up and give it two 110V inlets, to get around
> the customer having to install a 'special' outlet for it.  This sounds
> like a Really Bad Idea and a regulatory nightmare to me, so if 220V
> outlets are commonly available anyway I can shoot it down before it gets
> too far.

No, 220 VAC is not common in the US, at least not in homes or offices. 
I don't know what hospitals might have.  If you are talking about 
installing this in a lab setting, then providing 220 VAC is not really 
an issue, but it likely will require adding an outlet rather than just 
plugging it in.

All buildings have 220 VAC at the fuse panel, it is only distributed to 
the equipment that needs it like furnaces, clothes dryers and stoves. 
Office settings are often wired with both phases for the 110 VAC outlets 
with every other one on alternate phases.  This helps to balance the 
load on the two phases.  So there may well be 220 volts in a given 
outlet box, you just have to install a different outlet.  In homes they 
only run three wires to each outlet box, AC, common and earth.  So any 
220 VAC outlets will require a new run unless your unit goes in next to 
a dryer or stove that can be off when your unit runs.  I don't know 
code, but that is likely not allowed since running both could overload 
the circuit.

The bottom line is 220 VAC outlets are not commonly available, but 220 
VAC is available in all buildings if you want to run a line for a new 
outlet.

-- 

Rick C

Thread

Medical devices and US 220V electrics RBlack <news@rblack01.plus.com> - 2017-05-25 13:05 +0100
  Re: Medical devices and US 220V electrics Winfield Hill <hill@rowland.harvard.edu> - 2017-05-25 05:55 -0700
  Re: Medical devices and US 220V electrics upsidedown@downunder.com - 2017-05-25 17:26 +0300
    Re: Medical devices and US 220V electrics Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-05-25 10:27 -0400
      Re: Medical devices and US 220V electrics George Herold <gherold@teachspin.com> - 2017-05-25 08:39 -0700
        Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-25 12:40 -0400
    Re: Medical devices and US 220V electrics Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-25 15:03 +0000
      Re: Medical devices and US 220V electrics upsidedown@downunder.com - 2017-05-25 20:09 +0300
    Re: Medical devices and US 220V electrics RBlack <news@rblack01.plus.com> - 2017-05-25 16:56 +0100
      Re: Medical devices and US 220V electrics Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-25 16:42 +0000
      Re: Medical devices and US 220V electrics upsidedown@downunder.com - 2017-05-25 20:38 +0300
      Re: Medical devices and US 220V electrics whit3rd <whit3rd@gmail.com> - 2017-05-25 10:48 -0700
      Re: Medical devices and US 220V electrics Neon John <no@never.com> - 2017-05-28 15:48 -0400
      Re: Medical devices and US 220V electrics rickman <gnuarm@gmail.com> - 2017-05-29 01:08 -0400
    Re: Medical devices and US 220V electrics Cursitor Doom <curd@notformail.com> - 2017-05-25 17:51 +0000
      Re: Medical devices and US 220V electrics upsidedown@downunder.com - 2017-05-25 21:25 +0300
    Re: Medical devices and US 220V electrics "Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com> - 2017-05-26 11:55 -0400
      Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-26 17:38 -0400
        Re: Medical devices and US 220V electrics "Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com> - 2017-05-26 20:32 -0400
          Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-26 22:20 -0400
            Re: Medical devices and US 220V electrics "Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com> - 2017-05-27 00:33 -0400
              Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-27 09:37 -0400
  Re: Medical devices and US 220V electrics legg <legg@nospam.magma.ca> - 2017-05-25 12:07 -0400
    Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-25 12:49 -0400
      Re: Medical devices and US 220V electrics Neon John <no@never.com> - 2017-05-28 15:56 -0400
        Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-28 16:59 -0400
      Re: Medical devices and US 220V electrics upsidedown@downunder.com - 2017-05-30 12:37 +0300
        Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-30 17:41 -0400
    Re: Medical devices and US 220V electrics gregz <zekor@comcast.net> - 2017-05-30 06:58 +0000
  Re: Medical devices and US 220V electrics rickman <gnuarm@gmail.com> - 2017-05-25 12:15 -0400
    Re: Medical devices and US 220V electrics Jon Elson <jmelson@wustl.edu> - 2017-05-25 15:07 -0500
      Re: Medical devices and US 220V electrics John Larkin <jjlarkin@highland_snip_technology.com> - 2017-05-25 13:14 -0700
        Re: Medical devices and US 220V electrics Jon Elson <jmelson@wustl.edu> - 2017-05-25 16:34 -0500
      Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-25 18:47 -0400
        Re: Medical devices and US 220V electrics Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2017-05-27 01:46 +0200
          Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-26 19:53 -0400
            Re: Medical devices and US 220V electrics Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2017-05-27 02:05 +0200
              Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-26 22:21 -0400
                Re: Medical devices and US 220V electrics Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2017-05-27 04:25 +0200
                Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-26 22:33 -0400
                Re: Medical devices and US 220V electrics Sjouke Burry <burrynulnulfour@ppllaanneett.nnll> - 2017-05-27 21:48 +0200
  Re: Medical devices and US 220V electrics Don Y <blockedofcourse@foo.invalid> - 2017-05-25 11:20 -0700
  Re: Medical devices and US 220V electrics Jon Elson <jmelson@wustl.edu> - 2017-05-25 14:57 -0500
    Re: Medical devices and US 220V electrics RBlack <news@rblack01.plus.com> - 2017-05-26 12:17 +0100
      Re: Medical devices and US 220V electrics tabbypurr@gmail.com - 2017-05-26 04:53 -0700
      Re: Medical devices and US 220V electrics Phil Allison <pallison49@gmail.com> - 2017-05-26 06:00 -0700
      Re: Medical devices and US 220V electrics rickman <gnuarm@gmail.com> - 2017-05-26 12:05 -0400
      Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-26 17:51 -0400
        Re: Medical devices and US 220V electrics George Herold <gherold@teachspin.com> - 2017-05-26 17:54 -0700
          Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-26 22:24 -0400
      Re: Medical devices and US 220V electrics upsidedown@downunder.com - 2017-05-27 00:52 +0300
        Re: Medical devices and US 220V electrics Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-05-26 15:39 -0700
      Re: Medical devices and US 220V electrics Neon John <no@never.com> - 2017-05-28 16:34 -0400
        Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-28 17:26 -0400
          Re: Medical devices and US 220V electrics Neon John <no@never.com> - 2017-05-29 12:12 -0400
            Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-29 14:26 -0400
  Re: Medical devices and US 220V electrics Tim Wescott <tim@seemywebsite.really> - 2017-05-29 00:08 -0500
  Re: Medical devices and US 220V electrics David Lesher <wb8foz@panix.com> - 2017-05-29 20:24 +0000
    Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-29 16:37 -0400
      Re: Medical devices and US 220V electrics David Lesher <wb8foz@panix.com> - 2017-05-30 16:33 +0000
        Re: Medical devices and US 220V electrics Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-30 09:46 -0700
        Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-30 17:45 -0400
          Re: Medical devices and US 220V electrics David Lesher <wb8foz@panix.com> - 2017-05-31 03:31 +0000
            Re: Medical devices and US 220V electrics krw@notreal.com - 2017-05-31 17:58 -0400
              Re: Medical devices and US 220V electrics Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-06-01 07:54 +0000
                Re: Medical devices and US 220V electrics upsidedown@downunder.com - 2017-06-01 12:49 +0300
                Re: Medical devices and US 220V electrics Neon John <no@never.com> - 2017-06-01 10:28 -0400
                Re: Medical devices and US 220V electrics Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-06-01 14:45 +0000
                Re: Medical devices and US 220V electrics Neon John <no@never.com> - 2017-06-01 18:47 -0400
                Re: Medical devices and US 220V electrics Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-06-01 15:57 -0700
                Re: Medical devices and US 220V electrics Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-06-02 07:21 +0000
                Re: Medical devices and US 220V electrics krw@notreal.com - 2017-06-01 18:59 -0400
              Re: Medical devices and US 220V electrics David Lesher <wb8foz@panix.com> - 2017-06-03 14:00 +0000
                Re: Medical devices and US 220V electrics krw@notreal.com - 2017-06-03 11:19 -0400
    Re: Medical devices and US 220V electrics upsidedown@downunder.com - 2017-05-30 01:16 +0300
      Re: Medical devices and US 220V electrics tabbypurr@gmail.com - 2017-05-29 22:31 -0700
        Re: Medical devices and US 220V electrics Phil Allison <pallison49@gmail.com> - 2017-05-29 23:06 -0700
          Re: Medical devices and US 220V electrics tabbypurr@gmail.com - 2017-05-29 23:25 -0700
            Re: Medical devices and US 220V electrics Phil Allison <pallison49@gmail.com> - 2017-05-29 23:39 -0700
              Re: Medical devices and US 220V electrics tabbypurr@gmail.com - 2017-05-30 00:19 -0700
            Re: Medical devices and US 220V electrics rickman <gnuarm@gmail.com> - 2017-05-30 10:40 -0400
    Re: Medical devices and US 220V electrics rickman <gnuarm@gmail.com> - 2017-05-30 10:37 -0400
  Re: Medical devices and US 220V electrics Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-30 16:58 -0700
    Re: Medical devices and US 220V electrics Don Y <blockedofcourse@foo.invalid> - 2017-05-30 22:15 -0700
      Re: Medical devices and US 220V electrics Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-31 07:38 -0700
    Re: Medical devices and US 220V electrics Don Kuenz <g@crcomp.net> - 2017-05-31 14:05 +0000
      Re: Medical devices and US 220V electrics Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-31 07:40 -0700
      Re: Medical devices and US 220V electrics Don Y <blockedofcourse@foo.invalid> - 2017-05-31 09:37 -0700

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