Blue Sea Blade Fuse Block (negative bus) question

[irishkeet]

Hello

Im trying to decide which fuse block I need to buy. It will run from the leisure for connecting fridge, heater, USB etc etc

Should I get one with or without a Negative Bus/ And what exactly is a negative bus?

From what (I think) I understand the block on the left has 1 positive to it then you connect the positive from each device with a local earth.

The block on the right has a positive & earth from the leisure but I'm not sure what the Load Negative is doing. Not sure why I would choose one over another either



any help much appreciated

atb
irishkeet

[Oldiebut goodie]

Negative bus is used mainly on marine installations when you don't have a chassis earth available and have to run twin cables.

[Winchweight]

I use one similar to the one on the left. You have a live feed to the fuses which you tap off to your appliances. You then earth each appliance to a suitable chassis earth point adjacent to each rather than running pairs of wires everywhere.

[irishkeet]

Negative bus is used mainly on marine installations when you don't have a chassis earth available and have to run twin cables.

Now you have said that it makes complete sense to me

I use one similar to the one on the left. You have a live feed to the fuses which you tap off to your appliances. You then earth each appliance to a suitable chassis earth point adjacent to each rather than running pairs of wires everywhere.

Cheers Winchweight, that is what I was thinking, just wasn't 100%, not even 90% lol