[TechAssist] Re: Need advice from engineering folks.

  • From: "tvservice" <tvservice@xxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Wed, 5 May 2004 11:39:54 -0500

Yes, two 20 amp circuits should suffice
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc

----- Original Message ----- 
From: "walter wood" <wwood_38478@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, May 05, 2004 9:39 AM
Subject: [TechAssist] Re: Need advice from engineering folks.


> Yes, I think I just said that.
> The question is, "can I use the fuse rating on the
> amps, and other equipment to "gustimate" the needed
> service.
> For instance, I have 3 power amps that have 8 amp
> line fuses in them.
> I would need 24 amps to safely supply them at peak
> output.
> In reality, in this example, two 20 amp breakers.
> Is that about right??
> Thanks
> Walter
> --- tvservice <tvservice@xxxxxxxxxxxxx> wrote:
> >
> > OHMS LAW
> > W= watts/power
> > I= current/amps
> > E=volts
> >  I = E / R
> >
> > example  120v X 2.5a = 300w   or    300=2.5 X 120
> > or  300/120=2.5
> >
> >  multiply volt with current for watts
> > or divide volts into watts  for  current(amps)
> > or divide amps into watts for volts
> >
> > example: You have six lamps on a given circuit,
> > each lamp uses 300 watts.
> > Total of lamps on a circuit are 1800 watts and
> > are powered with 120 volts.
> > The lamps will require 15 amps (1800/120=15)
> >
> > hth
> > Robert
> > tvservice@xxxxxxxxxxxxx
> > H & H Electronics Inc
> >
> > ----- Original Message ----- 
> > From: "walter wood" <wwood_38478@xxxxxxxxx>
> > To: "Tech Assist" <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, May 04, 2004 9:54 PM
> > Subject: [TechAssist] Need advice from
> > engineering folks.
> >
> >
> > > Watts divided volts equal amps.
> > > 100 watts divided by 100 volts = 1 amp.
> > > That's the way a broadcast engineer told me to
> > > remember Ohms Law 40 years ago.
> > > Now the reason for the question;
> > > I have provided the main outdoor sound system,
> > > gratis, for the last 3 years, for the Relay for
> > > Life charity.
> > > The local college provides the lights, and the
> > > electric company puts a tempoary service at the
> > > location.
> > > We've never had enough electricity.
> > > Thet are offering to put a permanent service
> > there,
> > > and want to know how much IS enough.
> > > I measured the current through a 100 watt light
> > > bulb, on normal line voltage and read 0.82
> > amps.
> > > That's about right as the voltage was up from
> > the
> > > example, therefore the amperage goes down.
> > > I measured a 60 watt bulb and got 0.5, exactly
> > what
> > > it should be.
> > > I then measured a Peavey Session 400 amp, and
> > it
> > > read 0.44 amps at idle, but it didn't take much
> > > volume to raise the draw to 1 amp.
> > > The back plate on this amp states 600 watts and
> > 120
> > > volts.
> > > It is fused at 6 amps.
> > > Following the formula, it should pull 5 amps
> > "maxed
> > > out".
> > > I know that's a lot of e-mail, but the question
> > can
> > > be answered yes or know.
> > > "Will I be safe in requiring the amperage of
> > all
> > > the amps and effects, etc. to equal the total
> > of
> > > their fused ratings."
> > > I would think that would be more than adaquite,
> > but
> > > I'm asking for the expert advice.
> > > I intend to ask for much more because we see
> > the
> > > need getting larger in the future, and anyway,
> > it's
> > > impossible to know what kind of equipment
> > everyone
> > > will show up with.
> > > The college already knows the requirments for
> > the
> > > lights.
> > > TIA
> > > Water
> > >
> > >
> > >
> > > =====
> > > Walter Wood
> > > Future Tech Home Center
> > > 2786 Hwy. 43 N.
> > > Lawrenceburg Tn. 38464
> > > 931-829-3337
> > > Fax 931-829-4044
> > > mailto:wwood_38478@xxxxxxxxx
> > >
> > >
> > >
> > >
> > > __________________________________
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> >
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> =====
> Walter Wood
> Future Tech Home Center
> 2786 Hwy. 43 N.
> Lawrenceburg Tn. 38464
> 931-829-3337
> Fax 931-829-4044
> mailto:wwood_38478@xxxxxxxxx
>
>
>
>
> __________________________________
> Do you Yahoo!?
> Win a $20,000 Career Makeover at Yahoo! HotJobs
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