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Old 02-01-2009, 03:49 PM
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Help locate a relay

Watson's Streetworks is selling a nice item, a 40-amp relay with an intergral fuse holder. It would be a nice problem-solver except that the sell it for $25. I usually purchase electrical items from local marine dealers because I can get comparable or better quality for less cost, but the haven't seen this kind of relay (I hope the image gets attached). It's unlikely Watson's has them made exclusively for them, so I was wondering if anybody was aware of a catalog supplier that carried them.
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Old 02-01-2009, 03:57 PM
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Pretty cool feature, but I agree with you, $25 is a little steep. If you were doing a total wiring job it would cost you a small fortune to use those relays.

Vince
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Old 02-02-2009, 01:25 AM
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Relays

I bought several relays from Watsons and the quality is A+, I bought some cheaper ones and they were crap and failed also made that mistake on a light switch .Buy from Watsons and eliminate the worry,you really do get what you pay for.
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Old 02-02-2009, 12:02 PM
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Yes you get what you pay for, BUT sometimes you pay way too much for what your getting.

Before I'd shell out $25 for that relay I'd look around for another way of doing it.
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Old 02-02-2009, 12:39 PM
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40amp relay=the fuse needs to be connected direct to the batt post,,,,
or you are at risk for a wiring harness fire....

neat idea "if" you can mount the relay immediately next to the batt post?

Bussman and others do make a combo single fused-relay power distribution block unit but they are $25+
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Old 02-02-2009, 01:32 PM
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relay

you might want to check this out on www.jegs.com put this part# in search: 764-70113 this is an all in one,3 circuits one relay.Cheaper if you figure cost per circuit.
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Old 02-02-2009, 05:31 PM
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Quote:
Originally Posted by red65mustang
40amp relay=the fuse needs to be connected direct to the batt post,,,,
or you are at risk for a wiring harness fire....
I was thinking that the fuse was for the circuit being controlled.

The entire wiring harness should be protected by a single large amp fuse or a fusible link.

Otherwise youl'd have a bunch of fuses attached to the battery.
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Old 02-02-2009, 05:52 PM
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Quote:
Originally Posted by hduff
I was thinking that the fuse was for the circuit being controlled..
True, but it also protecs the wire.

Quote:
Originally Posted by hduff
The entire wiring harness should be protected by a single large amp fuse or a fusible link.
A large single fuse (Maxi Fuse) or fusable link would be in the circuit at the battery for instance if the battery is in the trunk where you would have a heavy AWG wire running to a fuse panel under the dash for fuse panel power. That one large fuse would protect that heavy supply wire only.

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Originally Posted by hduff
Otherwise youl'd have a bunch of fuses attached to the battery.
That one larger fuse could not protect a myriad of much smaller wires that branch off the fuse panel. Most wires from a fuse panel are usually #14 AWG or smaller which can be proteced with a 15 amp fuse or smaller. If you try and protect say a #14 AWG wire with a 50 amp fuse the fuse will never blow, the small wire will burn up and the fuse will not blow.
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Old 02-02-2009, 09:01 PM
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Relay Fuse Combo

Go to this page:
http://www.pickercomponents.com/Pages/Select_Relay.htm
about 3/4 the way down under automotive relays and look at PC798.
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Old 02-03-2009, 10:22 AM
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hduff,
the purpose of the relay is to NOT have the huge additional amps load on the car primary wiring...
that will cause a voltage drop/power loss to all the devices including the ign!!!

a typical harness primary wiring only has a few more amps "reserve" capability built in...
(the amps total of all the devices turned on determines primary wiring size/load capability)

so you use a relay to create a second batt "primary" power feed source for the new device amp load and only use the existing primary for the very small amps on/off relay control (when you add a electric fan/AC/electric fuel pump/halogen lamps/whatever)

look under the hood and dash of any new car,,,there ARE about a dozen relays,,,LOL,,,it would take a 00 batt cable as the primary wiring in the car to handle that much load directly...

what are you trying to wire?
what car?

Last edited by red65mustang; 02-03-2009 at 12:29 PM.
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Old 02-03-2009, 11:31 AM
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Quote:
Originally Posted by Chris Kemp
Go to this page:
http://www.pickercomponents.com/Pages/Select_Relay.htm
about 3/4 the way down under automotive relays and look at PC798.

Called a local supplier about PC798. They called Picker, and it was made as a gimmick type item, they will make the relay for anyone as a minimum 500 piece run. No price was given.
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Old 02-03-2009, 11:40 AM
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Quote:
Originally Posted by jaguarxk120
Called a local supplier about PC798. They called Picker, and it was made as a gimmick type item, they will make the relay for anyone as a minimum 500 piece run. No price was given.
What, you don't need that many?

Vince
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Old 02-03-2009, 12:01 PM
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Just 325, don't know what I'd do with the extra's maybe backup incase if one go's bad!

But right now I'm all set for relays and fuse holders.
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Old 02-03-2009, 12:57 PM
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jag,
that was a weird response from Picker Inc. "if" true...

I can think of a dozen "other" oem applications where it would be a excellent design choice....

their out there someplace,,,,not likely the speed shop is ordering 500 at a clip direct from Picker....
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Old 02-03-2009, 02:38 PM
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Actually I have all the relays I need right now plus some extras. Picked up a batch at a fall car show/swap handfull for a buck. The guy had OEM harness's that he scrapped out and the relays were the leftover gravy for him. Did well on that one all new stuff.
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