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Author Topic: Power delivery and efficiency  (Read 7068 times)

Victor Estrada

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Power delivery and efficiency
« on: November 24, 2017, 09:20:51 PM »

I just ordered a Peavey IPR2 7500, and I heard these come with a 20 amp plug. What's my best way of plugging it if the place doesn't have a 20 amp plug, without burning the place down? Also looking into basic, cheap power distributors/(conditioner not necessary) for a rack. Any ideas?
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Ivan Beaver

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Re: Power delivery and efficiency
« Reply #1 on: November 24, 2017, 09:32:12 PM »

I just ordered a Peavey IPR2 7500, and I heard these come with a 20 amp plug. What's my best way of plugging it if the place doesn't have a 20 amp plug, without burning the place down? Also looking into basic, cheap power distributors/(conditioner not necessary) for a rack. Any ideas?
Don't waste your time/money.

You won't "burn the place down", even if it could pull 50 amps.

The breaker on the circuit will limit how much power you can draw.

Very few places have 20A plugs.

I suggest simply making an adaptor cable (maybe 1' or so) with a 20A female recepticle and a standard 15A plug.

That way you can plug it in anywhere.

BTW, you will not come anywhere close to pulling 20A.  It is very efficient.

The size of the plug has to do with standard electrical ratings, not so much with how much it actually pulls from the wall.

But this is NOT advice, simply a comment, for legal reasons.

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Ivan Beaver
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Mike Monte

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Re: Power delivery and efficiency
« Reply #2 on: November 24, 2017, 10:07:06 PM »

I just ordered a Peavey IPR2 7500, and I heard these come with a 20 amp plug. What's my best way of plugging it if the place doesn't have a 20 amp plug, without burning the place down? Also looking into basic, cheap power distributors/(conditioner not necessary) for a rack. Any ideas?
Maybe one of these?
correctly embedded URL
« Last Edit: November 24, 2017, 10:19:46 PM by Mac Kerr »
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Ivan Beaver

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Re: Power delivery and efficiency
« Reply #3 on: November 25, 2017, 08:01:46 AM »

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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
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John Halliburton

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Re: Power delivery and efficiency
« Reply #4 on: November 25, 2017, 10:35:45 AM »

That would do it.

I just remove the original and wire in a 15a Edison, often in the process shortening the cable as it is going into a rack.

Best regards,

John
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John Roberts {JR}

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Re: Power delivery and efficiency
« Reply #5 on: November 25, 2017, 11:35:57 AM »

In the early days of high power amps, UL forced us to put 30A camper plugs on 3kW power amps, they eventually relaxed that requirement because of the low duty cycle and low average current for typical music. If Peavey is putting a 20A plug on that amp they are probably again being forced to by UL.

For light (typical duty) an 15A adapter will probably work...(back in the day many used Edison adapters for the 30A plugs).  If the 15A adapter plug feels hot after a loud gig, maybe do the right thing and use a proper 20A outlet.

The higher rated amperage plugs are all about contact resistance and heat rise...

JR
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Bob Faulkner

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Re: Power delivery and efficiency
« Reply #6 on: November 27, 2017, 08:20:39 PM »

Maybe one of these?
correctly embedded URL
Shouldn't these adapters have a UL or CE rating on them?  Maybe I don't see it, but it doesn't appear these have been rated.

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Mark Cadwallader

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Re: Power delivery and efficiency
« Reply #7 on: November 27, 2017, 08:36:05 PM »

Part 2 of your question is about a rack mount power distributor.  Do you need it to be 20A, or will 15A suffice?  Basic 15A units are fairly cheap; 20A not so cheap (from what I've causually seen).  A computer supply place is a reasonable place to look.

As to part 1, if you build an adapter cord you can avoid the extra leverage a long one-piece adapter will put on the receptical. (Whether in your rack or into a wall.)
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Tim McCulloch

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Re: Power delivery and efficiency
« Reply #8 on: November 27, 2017, 08:36:43 PM »

Shouldn't these adapters have a UL or CE rating on them?  Maybe I don't see it, but it doesn't appear these have been rated.

Conntek supplies a whole bunch of marine, RV, construction and generator wiring products, pictures of some of on their site show a UL sticker.

I suggest call them if anyone has a question about a specific product:  1-877-267-3788
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Bob Faulkner

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Re: Power delivery and efficiency
« Reply #9 on: November 27, 2017, 10:14:33 PM »

Perfect.  Thank you.
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Re: Power delivery and efficiency
« Reply #9 on: November 27, 2017, 10:14:33 PM »


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