Victron 1000A Shunt

[quartones]

There are 4 big bolt(M10) on this shunt.
Do this 4 bolt(M10) all need to be connect to wire?

[Lancerbye]

A 1000a shunt is a shunt capable of measuring some serious current. Usually to accommodate this you would use 2 cables of considerable size. Two in, two out. If you are using it for a single heavy cable application just use the most conveniently located studs.

[quartones]

Thanks!
So If I have a heavy wire, I can just use one in one out?
If my wire is not heavy enough, I need two in two out?

[David M]

No, not all the bolts need to be connected. The extra bolts are there so you can conveniently attach a second cable.

What size wire you need to carry 1000 amps is a different thing. The reason it has two bolts on each side is that it would take an enormous diameter cable to carry 1000 amps. It is more likely that if you need a shunt that big that you will be attaching two or more cables on at least one of the sides of the shunt.

[Lancerbye]

Originally Posted by quartones

Thanks!
So If I have a heavy wire, I can just use one in one out?
If my wire is not heavy enough, I need two in two out?

yup.

[quartones]

Thanks,
one more question,the 2000A has 6 big bolts(4 on top side,2 on front side)
also one in one out, if the wire is heavy enough?

[GordMay]

Where are you going to find wire rated at 1,000A or 2,000 Amps?
Have you any idea what size those ampacities would require?
How would you connect it to those terminal screws?

Notwithstanding, I doubt that you'd actually be metering a 1,000A (nor 2000A) load.

Remember, a shunt rating represents a RATIO, such as 1,000A current = 50 milliAmp to meter.

[mitiempo]

The shunt isn't sized to the battery bank, but to power use. You most certainly don't need one rated for 1000 amps. And as GordMay said, wire that carries 1000 amps is not available off the shelf. The largest wire you will find on a boat is 4/0 and it is rated for 445 amps outside engine spaces and 378 amps in engine spaces. 2/0 is much more common.

What are the rest of the components in your system? Battery bank size, type of boat, expected draw, etc?