Fuses And Wiring Help

[mcdonour]

Hello
​I am doing a similar rewiring to my 1995 17' Spectrum Pro Avenger.

Will be updating the fuse panel which is old and would like to confirm proper fuse sizes for these items below.
Confirmed sizes already relating to wire lengths and will mainly be using 16 gauge wiring, marine fuse blocks etc.

Fuse sizes needed
Gauges for : Fuel, RPM, MPH, Trim
-Horn
-Nav/Anchor Lights
-Bilge
-Live Well
-Radio

​I would also like some advice on which items should be wired directly to battery fuse and which should be wired to the ignition?
Right now I plane to connect all to switch?

Thanks in advance
Ray

 

[GA_Boater]

mcdonour

Your new topic.

 

[alldodge]

Howdy

Your gauges are part of the engines system and should be a 20 amp. When key is turned to ON there should be a 20 amp fuse to protect the system

Nav/Anchor - 20

The Horn, Bilge, Live well and Radio should all be fused based on the manufactures spec. Every part can very based on the model and size. The standard Radio without an amplifier in most cases no more then 10 amp but it needs to be looked at to see what it should have. Look on the components to see what is called for.

Here is the standard wiring pic

 

[mcdonour]

Thanks for input.
​I assume that the "10 gauge to battery switch" refers to the key ignition switch?

Would it be best to put the main fuse between the battery and the key switch or the key switch and the fuse panel?

Ray

 

[Silvertip]

No -- the feed to a fuse panel is NOT from the ignition switch. It is either directly from the battery or via a battery disconnect or dual battery switch. And there should be a fuse or circuit breaker in that feed within a foot or so of the battery terminal.

 

[mcdonour]

Tks
​That is what I thought, but where would the key ignition fit into this?

I already have the fuse located near the battery.
Will be using a new negative bus and a 12 switch blue sea Fuse block as below which will be similar as your diagram.

I must be missing something but this diagram seems to show all continuous power?



To improve clarity of what I am working on I will include these dash pictures.

It is a simple 17ft fishing boat and do not want it confused with a nicer one.

I am thinking of going from battery fuse to fuse block and then have each terminal go to components in dash but sorting out key switch in wiring diagram.






Thanks again.
Ray

 

[mcdonour]

Tks
​That is what I thought, but where would the key ignition fit into this?

I already have the fuse located near the battery.
Will be using a new negative bus and a 12 switch blue sea Fuse block as below which will be similar as your diagram.

I must be missing something but this diagram seems to show all continuous power?



To improve clarity of what I am working on I will include these dash pictures.

It is a simple 17ft fishing boat and do not want it confused with a nicer one.

I am thinking of going from battery fuse to fuse block and then have each terminal go to components in dash but sorting out key switch in wiring diagram.






Thanks again.
Ray

 

[alldodge]

My comments pertained to the components/circuits of the listed items in post one. I missed this comment

I would also like some advice on which items should be wired directly to battery fuse and which should be wired to the ignition?

Power to the key switch comes from the motor and its harness. The power from the battery goes to the starter, then connects to the motor harness, then travels up to the key switch. The battery wires can be part of the harness plug with an outboard, an inboard the main cables run to the starter before they leave the motor through the motor plug.

 

[mjf55]

AllDodge, on post 3, you said "Nav/Anchor - 20". That seems high. Can you elaborate on why 20 amps is required?

 

[MH Hawker]

nothing but the interments should be wired into the key switch ever

 

[alldodge]

AllDodge, on post 3, you said "Nav/Anchor - 20". That seems high. Can you elaborate on why 20 amps is required?

In most cases there is always more then just Nav lights being feed from the lighting circuit. A 20 amp line winds up feeding other things. You are correct, in most cases only need about 10 amp for incandescent bulbs

 

[mjf55]

Thanks AllDodge for the clarification.

 

[sam am I]

I would also like some advice on which items should be wired directly to battery fuse and which should be wired to the ignition?
Right now I plane to connect all to switch?

Along with Dodge's et al drawing's/input's......This very basic/backbone wiring might help......There are variations (charging, loading schemes, etc) out there but, this seems to be the best practice factory'ish boiler plate scheme........Ya might need to adjust your values accordingly depending on loads, wiring types/size's etc etc..

 

[NicoPags]

I see lots of inputs here. Any of the above will solve your woes so this may just be redundant. Your very simple bass boat reminds me of my very simple runabout. I ran a 24hr circuit to the BlueSea systems fuse block, aka constant power. From there, each accessory is individually switched with a fuse for on/off. Nothing is wired to my ignition accessory.