EWP Owners - Where did you mount your relay?
03-08-2009, 08:50 AM
#1
EWP Owners - Where did you mount your relay? I am getting ready to wire up and mount the relay and fuse (circuit breaker) for my Painless Water Pump Relay kit. It also requires that I connect a wire to a switched source so the pump turns on when the key is on. I am not going to use a manual switch at this time. AFAIK, I have a switched source available on the driver's side fender at the fuse/relay box. My power source is all the way across the vehicle on the passenger's side fender. So it appears that I have to run either the power wire all the way across the car if I mount the relay on the driver's side, or the switch wire all the way across the car if I mount the relay on the passenger's side. Am I correct, or am I missing something?
Thanks in advance.
Thanks in advance.
03-08-2009, 09:01 AM
#2
You are correct. I would run the relay, and I did for mine, on the passenger side. You would have some voltage lost if you ran it on the drivers side due to length of power wires. And then the power wire that trips the relay doesn't have to be huge in size, not much load on tripping a relay.
__________________
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
03-08-2009, 02:23 PM
#4
Mine's on the fenderwall right above/behind the battery and below/in front of the + junction.
Easy install and a good idea.
Also, remember to run an appropriate fuse inline with the pump.
Easy install and a good idea.
Also, remember to run an appropriate fuse inline with the pump.
03-08-2009, 02:46 PM
#6
http://www.faqs.org/faqs/electrical-...ection-18.html
Originally Posted by http://ecatalog.squared.com/pubs/Circuit%20Protection/0600DB0601.pdf
fuse—An overcurrent protective device with a circuit-opening fusible
part that is heated and severed by the passage of overcurrent through it.
circuit breaker—A device designed to open and close a circuit by
nonautomatic means and to open the circuit automatically on a
predetermined overcurrent without damage to itself when properly
applied within its rating.
03-08-2009, 04:14 PM
#7
What comes in the kit will work for you.
__________________
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
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03-08-2009, 04:15 PM
#8
It came in the kit. I was curious about it because it has no rating, but the wiring diagram they show makes it appear to have the same function as a fuse. Battery --> circuit breaker (their label, not mine) --> relay --> pump.
The main advantage of a circuit breaker in this application versus a fuse is that the breaker will reset itself, while the fuse must be replaced.
I appreciate your concern.
03-08-2009, 04:20 PM
#9
I have the same kit with circuit breaker and am running the Meziere Heavy Duty pump. It hasn't overloaded the breaker yet. Not sure of it's rating either, but has worked fine so far.
__________________
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
03-08-2009, 06:46 PM
#10
Oh my. Trust me, as a EE I understand both its function and its importance.
It came in the kit. I was curious about it because it has no rating, but the wiring diagram they show makes it appear to have the same function as a fuse. Battery --> circuit breaker (their label, not mine) --> relay --> pump.
The main advantage of a circuit breaker in this application versus a fuse is that the breaker will reset itself, while the fuse must be replaced.
I appreciate your concern.
It came in the kit. I was curious about it because it has no rating, but the wiring diagram they show makes it appear to have the same function as a fuse. Battery --> circuit breaker (their label, not mine) --> relay --> pump.
The main advantage of a circuit breaker in this application versus a fuse is that the breaker will reset itself, while the fuse must be replaced.
I appreciate your concern.
Some people buy them used with the pigtail snipped and don't have a fuse or breaker at all; that's what I was trying to get at.
03-08-2009, 11:08 PM
#11
Which is what I expected.
I understand, and I appreciate it. I have seen others fail to employ an in-line fuse and I just have to shake my head in wonder.
I was puzzled by their label. It is a fairly flat device with two different colored metal poles. I therefore suspect it is a bi-metal device, containing two strips of different metals, each with differing coefficients of expansion. When the current increases, they expand away from each other, thus breaking the circuit. When they cool back down, they restore the contact. A rather unusual device for a mere automotive electrical circuit.
Some people buy them used with the pigtail snipped and don't have a fuse or breaker at all; that's what I was trying to get at.
I was puzzled by their label. It is a fairly flat device with two different colored metal poles. I therefore suspect it is a bi-metal device, containing two strips of different metals, each with differing coefficients of expansion. When the current increases, they expand away from each other, thus breaking the circuit. When they cool back down, they restore the contact. A rather unusual device for a mere automotive electrical circuit.
03-09-2009, 07:21 AM
#12
I was puzzled by their label. It is a fairly flat device with two different colored metal poles. I therefore suspect it is a bi-metal device, containing two strips of different metals, each with differing coefficients of expansion. When the current increases, they expand away from each other, thus breaking the circuit. When they cool back down, they restore the contact. A rather unusual device for a mere automotive electrical circuit.
I wonder how it does in the event of a short? (IE: wiring gets melted or cut)
03-09-2009, 08:19 PM
#15
You can see the relay by where the battery goes. The circuit breaker is just to the outside of it. And for what it's worth, Painless Wiring CB's are rated @ 30 amps.
__________________
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
10-22-2009, 06:14 PM
#16
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sorry to bring up a dead thread... but this pertains to a question i have about the painless kit.... the circuit breaker they give is cased in metal and the mounting tabs are metal... and if this was mounted on the positive side (which i would imagine is has to be iv never mounted a negative breaker duhhh) will it ground out if mounted with sheetmetal screws into the structure of the car... or is the voltage directed through that case in a way that the casing isnt live... thanks for any help
