[nylug-talk] Cleaning dirty power

[Ruben Safir]

Vin is the man... trust in the Vin


You were on our discussion list today at the meeting


Ruben



On Wed, Jun 07, 2006 at 04:07:35PM -0400, Vin wrote:
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> On Wednesday 07 June 2006 09:09 am, Randy Rodriguez wrote:
> > This discussion brings to mind an issue I'm having at my place.  The
> > *entire* apartment is powered off of a SINGLE 15 amp circuit.  
> 
> Wired for fire.
> 
> > That's 
> > right, the 'fridge, microwave, TV, computers, wall sockets, lights,
> > etc.  All of it. 
> 
> Have you seen Apollo 13?
> 
> > We've become very careful about what's drawing 
> > current at any given time, but my question is would having my boxen on
> > a UPS prevent the fuse from blowing when, for example, the 'fridges
> > compressor kicks in?
> 
> No.  It will keep your boxen from shutting down from a power outage if the 
> brekaer trips.  It won't prevent the breaker from tripping.  However, a 15 
> amp circuit is 1800 watts.  It will take a momentary surge of +10% iirc, 
> without tripping the breaker, which allows for the compressor's startup 
> voltage requirements in most instances.  If the wattage is maintained above 
> 1800 or so taking into account tolerances, then the circuit breaker will trip 
> no matter what you do.
> 
> > It doesn't do so now
> 
> You are staying below 1800 watts average, and staying below the momentary 
> surge rating of the breaker.
> 
> > (tho there is a visible  
> > sag, e.g. the lights dim), 
> 
> This is an undervoltage situation due to the load.  You are slowly damaging 
> all your equipment which isn't rated for whatever voltage you are dropping 
> below.  Take a voltmeter and measure the voltage when the lights dim.
> 
> > but if I had the microwave running 
> 
> Microwaves are easy.  You can control most in 100 watt increments.  Use a very 
> low setting and cook/heat longer.  Unplug something else and raise the 
> wattage on the microwave, cook/heat faster.
> 
> > and all  
> > my machines powered up and the compressor started up, it probably
> > would.
> 
> 1800 watts or so is the magic number.
> 
> Buy fire extinguishers for every room.  all ABC rated, or some ABC and some 
> electric-only rated.  Buy a fire escape ladder if not on the first floor, or 
> a parachute.  And set up some video cameras from other properties pointing 
> towards yours.  You are in a position to make some fire department 
> instructional videos.  Might as well take advantage of your situation.
> 
> vin.
> 
> > On 6/6/06, Ruben Safir <ruben at mrbrklyn.com> wrote:
> > > > Was it alien space crafts?
> > >
> > > BTW - Chicago has a users group called UFO
> > >
> > >
> > > Ruben
> > > --
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