Installing a relay for compressor: check my diagram

[slickrock]

Hey guys,

I have done this before but this wiring diagram for the realy is a bit different. I am installing a VIAIR pressure switch with relay. The only directions stated:
Big Red to power source
White to compressor
Little red to switch positive
Black ground

Easy enough and my switch will be lighted so it will be grounded. If I don't it will be just a two wire switch since that is what I have in my box. So check my diagram (way 80s) to make sure I have it right.

I am putting a 30 am fuse in the battery to relay and then a 10 amp for a battery to switch with proper wire size.

My diagram look right?

Thanks,

Dan

 

[MrMoMo]

Almost looks like it should work (pretty scary drawing though!)

Lets walk through it...

Source: Battery
Controls:Toggle switch, Relay, fuses
Loads:Compressor & relay coil

Break it into two circuits;
1st - Battery, 10A fuse, toggle, relay coil, ground

Can you follow your wires in that order through the components?
1st) As long as your black wire from the switch is ONLY for the light inside it, and not the circuit powering the relay coil, then it appears that power can flow from the source, through the controls, to the load and back to ground. If the power can flow through the switch ground, you will end up popping your 10A switch fuse.

2nd) Battery, 30A fuse, relay switch compressor, ground

Yup, looks OK to me... but please... allow me to upgrade your drawing.

 

[slickrock]

Ummm yeah, your drawing is what I said.

I was laughing while reading your reply. My 3 year old son was telling me how to pick the drawing tools on paint so it was a bit disco. He was like, that one daddy, the pencil.

Yours is much better.

Thanks

 

[GulfShoresFJ60]

Just curious MrMoMo, what program did you use to draw that?

 

[MrMoMo]

Yeah, it's a bit easier when that is what you do all day.

I draw wiring diagrams for boats all day at work. - design the system and draw it, change it, draw it again, then change it again. Give it to someone to build, then chnge it again to what they built

It's drawn in autoCAD 14 , then exported to a JPG.

**EDIT -just wanted to note that this is not what my work drawings look like, the relay would be an actual schematic relay etc, but I figured it might be easier for some folks to understand if it was just a block diagram...**