Need a 120 volt relay

Posted by Mortimer Schnerd on July 3, 2009, 9:09 am

cjt wrote:

> John Gilmer wrote:

>> Since you only need 11 amps you can consider getting a two pole relay
>> from R/S with each pole rated for 10 amps. Wire the poles in
>> parallel and you have a 20 amp relay.

> ... except that one side will invariably connect/open first, so that the
> load won't be equally shared and it'll burn out faster than a device
> that's designed for 20 amp service.

I thought about that last night. I think I found the answer with a
120VAC 15 amp double pole single throw relay from WW Grainger.

http://www.grainger.com/Grainger/wwg/itemDetails.shtml

Thanks to everyone who answered. There were several possibilities but
no other cost only $12.80.

I'm off to Grainger's....

Mortimer Schnerd, RN
mschnerd at carolina.rr.com

Posted by Mark Lloyd on July 3, 2009, 9:40 am

wrote:

>John Gilmer wrote:

>> Since you only need 11 amps you can consider getting a two pole relay from
>> R/S with each pole rated for 10 amps. Wire the poles in parallel and you
>> have a 20 amp relay.
>>
>>

>... except that one side will invariably connect/open first, so that the
>load won't be equally shared and it'll burn out faster than a device
>that's designed for 20 amp service.

I got one of those relays (from Radio Shack) once. The relay itself
was rated for 10A. The package it came in said 15A.
--
Mark Lloyd
http://notstupid.us

"Properly read, the Bible is the most potent
force for atheism ever conceived." -- Isaac Asimov

Posted by SMS on July 13, 2009, 11:11 am

Mortimer Schnerd wrote:

> jeff_wisnia wrote:
>

>> Rat Shack has 'em if you don't have any other source. You can prolly
>> find a socket for one there too, or just cut both ends off an
>> extension cord leaving a few inches of wire on each and solder
>> directly to the relay's lugs.
>> http://www.radioshack.com/product/index.jsp?productId=2049721

>
>
> That one is only good for 10 amps. My amp can draw 11 so I'm really
> looking for one rated for 15-20 amps.
>
>
> Mortimer Schnerd, RN
> mschnerd at carolina.rr.com

"http://www.allelectronics.com/make-a-store/item/RLY-482/120-VAC-40-AMP-RELAY/-/1.html"

$2.50

Great outfit, I've been ordering from them for many, many years,
including a lot of relays!

Posted by Red Green on July 3, 2009, 10:25 am

> Mortimer Schnerd wrote:

>> I'm looking for a cheap 120 volt relay to use with my stereo system.
>> I've got a receiver that has pre in/main out jumpers and so I've
>> added a second power amp to it which is a lot more powerful that
>> what's already built into the receiver. I'm actually powering three
>> rooms of speakers (8 speakers all told); two sets on the receiver's
>> power amp and 4 speakers in my bedroom off the external power amp.
>>
>> I want the power to the amp to come on whenever I power up the
>> receiver but it's a PITA to get to because of the way it's physically
>> installed.
>>
>> The AC outlet on the back of the receiver is only rated for 100 watts
>> max. The power amp can draw up to 11 amps so the receiver's AC
>> outlet isn't going to work.
>>
>> So what I think I need is a relay. The switched outlet on the back
>> of the receiver can power the coil and then the relay can handle the
>> power requirements of the external power amp.
>>
>> So where can I find such a thing? Ideas?
>>
>>
>>
>> Mortimer Schnerd, RN
>> mschnerd at carolina.rr.com

>
>
> Rat Shack has 'em if you don't have any other source. You can prolly
> find a socket for one there too, or just cut both ends off an
> extension cord leaving a few inches of wire on each and solder
> directly to the relay's lugs.
>
> http://www.radioshack.com/product/index.jsp?productId=2049721
>
> Jeff
>

prolly?

Come oooooon Jeff. You know too much to be 15 yrs old :-)

Posted by JIMMIE on July 3, 2009, 10:47 am

XnZ2dnUVZ_rGdnZ2d@giganews.com:

> > Mortimer Schnerd wrote:

> >> I'm looking for a cheap 120 volt relay to use with my stereo system.
> >> I've got a receiver that has pre in/main out jumpers and so I've
> >> added a second power amp to it which is a lot more powerful that
> >> what's already built into the receiver. =A0I'm actually powering three
> >> rooms of speakers (8 speakers all told); two sets on the receiver's
> >> power amp and 4 speakers in my bedroom off the external power amp.
> >> I want the power to the amp to come on whenever I power up the
> >> receiver but it's a PITA to get to because of the way it's physically
> >> installed.
> >> The AC outlet on the back of the receiver is only rated for 100 watts
> >> max. =A0The power amp can draw up to 11 amps so the receiver's AC
> >> outlet isn't going to work.
> >> So what I think I need is a relay. =A0The switched outlet on the back
> >> of the receiver can power the coil and then the relay can handle the
> >> power requirements of the external power amp.
> >> So where can I find such a thing? =A0Ideas?
> >> Mortimer Schnerd, RN
> >> mschnerd at carolina.rr.com

> > Rat Shack has 'em if you don't have any other source. You can prolly
> > find a socket for one there too, or just cut both ends off an
> > extension cord leaving a few inches of wire on each and solder
> > directly to the relay's lugs.
> >http://www.radioshack.com/product/index.jsp?productId=3D2049721
> > Jeff

> prolly?
> Come oooooon Jeff. You know too much to be 15 yrs old :-)- Hide quoted te=

xt -

> - Show quoted text -

I did something very similar to what the OP wants using a DPDT relay
wih the contacts wired in paralell.

Jimmie

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