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 > > > > > > > > > > > > > > > __________________________________ > > > Do you Yahoo!? > > > Win a $20,000 Career Makeover at Yahoo! HotJobs > > > > > > http://hotjobs.sweepstakes.yahoo.com/careermakeover > > > > > > > > > -------------------------------------------------------------------------- > > --- > > > Lost Password: > > > http://www.tech-assist.org and select "Login > > Problems?". > > > Email Archives: > > > //www.freelists.org/archives/techassist/ > > > > > > > > > -------------------------------------------------------------------------- --- > > Lost Password: > > http://www.tech-assist.org and select "Login > > Problems?". > > Email Archives: > > //www.freelists.org/archives/techassist/ > > > ===== > 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! 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