JD5520 750Watt Inverter Hardwire

[papafoxtrot]

according to a quick Google search, there is a fuse on the input side. I would get a breaker/fuse of that size and install that as close to the battery as possible.

Aaron Z

I'm a bit confused here. If there is a fuse on the input, as you say here, why would you need another. I've mounted a 2000W inverter above the battery of my 3520 and was about to wire up the 12V leads when I happened upon this thread. My 2000W (Whistler) has fuses on the input and a resetable breaker on the AC side.

 

[Soundguy]

2 protection devices won't hurt any...

soundguy

 

[patrick_g]

2 protection devices won't hurt any...

soundguy

But just adding redundant fuses in series does not always increase safety.

I have seen times when fuses in series makes sense. A fast blow fuse at a higher rating than a regular fuse (or slowblow fuse) protects against transients (short duration current spikes) that would not pop a slow blow fuse. Slow blow fuses allow brief overloads and pop when overloaded for a longer time or are severely overloaded for a shorter time.

Placing the fuse near the power source (battery) protects against a short in the power distribution wiring. That is a likely reason/case for two fuses. The manufacturer puts a fuse at the equipment and the savvy installer puts one near the power source so the run of wire from the batt to the unit is also protected. A short in a heavy wire connected to the battery can be quite spectacular.

Pat

 

[Travelover]

When I put a 1000 watt inverter on my Escape Hybrid, I used a 200 amp fuse at the battery in case the cable to the inverter got shorted. They are readily available for use in car audio systems (think those annoying boom boom boom cars).

Google "100 amp fuse"

 

[SPYDERLK]

I'm a bit confused here. If there is a fuse on the input, as you say here, why would you need another. I've mounted a 2000W inverter above the battery of my 3520 and was about to wire up the 12V leads when I happened upon this thread. My 2000W (Whistler) has fuses on the input and a resetable breaker on the AC side.

Every fuse in the circuit has a voltage loss inherent in its passage of current. Fuses blow by heating. In order to make maximum use of available power use only the protection built into the inverter. Protect the primary wires physically to prevent shorts - or else use hi value fuse ~ double max primary demand. This will avert frying the wires in a short, but have virtually no loss in normal operation in comparison to a smaller fuse.
larry

 

[HarryVanderpool]

There are two reasons to fuse or employ breakers;
1) To protect the wires.
2) Overload protection of the device

It sounds like the inverter has overload protection already.
The nice thing about selecting fuses for a given wire size is that it is all very standard.
In your case I think I would run #4 wire and a 75 amp, time delay fuse.

 

[Soundguy]

Yep.. ditto that.. i usually add a barrier strip power distribution block to my tractors, then run accy power lines from there.. even if the accy line has an inline fuse.. my distribution point is also fused ( higher level to allow for distribuited loads running concurently.. etc.. )

soundguy

But just adding redundant fuses in series does not always increase safety.

I have seen times when fuses in series makes sense. A fast blow fuse at a higher rating than a regular fuse (or slowblow fuse) protects against transients (short duration current spikes) that would not pop a slow blow fuse. Slow blow fuses allow brief overloads and pop when overloaded for a longer time or are severely overloaded for a shorter time.

Placing the fuse near the power source (battery) protects against a short in the power distribution wiring. That is a likely reason/case for two fuses. The manufacturer puts a fuse at the equipment and the savvy installer puts one near the power source so the run of wire from the batt to the unit is also protected. A short in a heavy wire connected to the battery can be quite spectacular.

Pat

 

[wkpoor]

Have you seen the new 14V cordless impacts from Snap-ON??? They have 250lb of torque and really do work well. I got one and am amazed at the power. Sure would simply all your going through to power an AC one. Best of no cord! Snap -On is pricey stuff but I'll bet its a fraction of this power mod.

 

[Drylander]

Bussman is a manufacturer of re-settable fuses for this type of mobile equipment circuitry. They have power disconnect switches to separate the device from the battery when not in use. Find these on the internet or local truck equipment shop. Also Graybar or ITT type supply house for electronic/electrical components for manufacturers.

Good luck

 

[mjncad]

Check out the bottom of page 896 at McMaster-Carr for low voltage, high amperage automotive fuses.

McMaster-Carr

I used one of the mega fuses to protect my headliner wiring system.