750 watt inverter fuse?

Got the inverter wired up with about 8 feet of 4 gauge wire. Its as close to the battery's as it can be and stay dry.

Gdetrailer wrote:

ScottG wrote:
It may already have fuses.

Some inverters do, and some do not.. Those that do, the fuse is for reverse polarity protection or catastrophic overload protection of the inverter..

The built in inverter fuse has nothing to do with protecting the WIRE from the battery to inverter.

The rule of thumb for ANY voltage source is to FUSE (breaker or fuse) your wire AT THE SOURCE ON POWER. Typically within 18" of the battery..

You ALWAYS fuse OF THE WIRE TO NO MORE than the max SAFE current..

You can underfuse but never exceed the allowable safe current.

For instance 12ga wire can handle 20A, you either fuse to 20A or you can fuse to 15A or less.. But don't fuse to 30A!

The idea is if something happened that the wire insulation was chafed and a short develops along the wire the fuse will blow before the wire gets hot enough to cause a fire..

The fuse also protects the wire from overload of the wire due to excessive current drawn from the load..

Thank you for explaining that. I fuse my 4 AWG inverter supply wiring with an 80 amp fuse, as SMkettner suggests.

ScottG wrote:
It may already have fuses.

Some inverters do, and some do not.. Those that do, the fuse is for reverse polarity protection or catastrophic overload protection of the inverter..

The built in inverter fuse has nothing to do with protecting the WIRE from the battery to inverter.

The rule of thumb for ANY voltage source is to FUSE (breaker or fuse) your wire AT THE SOURCE ON POWER. Typically within 18" of the battery..

You ALWAYS fuse OF THE WIRE TO NO MORE than the max SAFE current..

You can underfuse but never exceed the allowable safe current.

For instance 12ga wire can handle 20A, you either fuse to 20A or you can fuse to 15A or less.. But don't fuse to 30A!

The idea is if something happened that the wire insulation was chafed and a short develops along the wire the fuse will blow before the wire gets hot enough to cause a fire..

The fuse also protects the wire from overload of the wire due to excessive current drawn from the load..

Try to locate the inverter closer to the battery bank. Use a T class Fuse at the battery. This is a "must do".

Yes, the line should be fused or otherwise protected (self-resetting circuit breaker) as close to the battery as practical. The purpose of the fuse here is to protect the wire from getting too hot and starting a fire in the case of a short circuit, rather than primarily protecting the inverter. The inverter probably does have fuses built into it.

You likely don't need anywhere near that large an inverter for a TV and a DVD player, particularly if it's an LCD or LED TV.

I recommend #4 wire and an 80 amp fuse close to the B+ terminal.

http://www.genuinedealz.com/blue-sea-systems-5006-maxi-fuse-block-80-amp-max

These guys will custom build the cables too.

It may already have fuses.