Fuses for Lithium, again, apologies

[Lightwave395]

Been following the threads on fuses until my head aches, most of the debate relates to T class vs MRBF fuses T class being clearly expensive but also NH fuses are referenced but any detail seems to have been'parked'
Unless I've missed something (quite possible after some hours of reading and rereading) NH fuses and holders appear to be somewhat cheaper than T class. I'll spend the money on T class if needed but is NH a 'safe' alternative - 200aH lithium with no invertor or any other loads beyond the usual sailboat 12V requirements

 

[PaulRainbow]

NH are fine, but as always, double check the interrupt rating.

 

[Sea Change]

Geem has fitted NH fuses. I believe they actually have a higher AIC than class T.
I looked in to them, but didn't get as far as choosing either fuses or holders before other jobs took over priority.
Also, I may have mentioned this on other threads, but not all class T fuses are created equal- I thought I'd found a bargain and bought a pair of Renogy class T fuses with holders for $20 each. But they're only rated at 10k AIC. When they arrived, they turned out to be quite small compared to ordinary class T.

 

[Lightwave395]

Geem has fitted NH fuses. I believe they actually have a higher AIC than class T.
I looked in to them, but didn't get as far as choosing either fuses or holders before other jobs took over priority.
Also, I may have mentioned this on other threads, but not all class T fuses are created equal- I thought I'd found a bargain and bought a pair of Renogy class T fuses with holders for $20 each. But they're only rated at 10k AIC. When they arrived, they turned out to be quite small compared to ordinary class T.

Interestingly the fuses seem pretty cheap - £10 for Merson 200A and have a high AIC but the holders seem more expensive than T class so the NH's are around 20% or so cheaper, might as well stick to T's I think

 

[geem]

Interestingly the fuses seem pretty cheap - £10 for Merson 200A and have a high AIC but the holders seem more expensive than T class so the NH's are around 20% or so cheaper, might as well stick to T's I think

One advantage of NH is the speed with which you can swap them out. No spanner needed. If you need to carry a spare fuse as well (we do) then this also makes a difference to the overall cost picture.

 

[Sea Change]

How secure are the NHS fuses? They don't seem specifically designed for mobile applications.
I presume they're also not ignition protected?

 

[PaulRainbow]

How secure are the NHS fuses? They don't seem specifically designed for mobile applications.

Very secure. They have been used in production boats for decades.

I presume they're also not ignition protected?

They are ignition protected to standards such as ISO 8846

 

[Sea Change]

Very secure. They have been used in production boats for decades.

They are ignition protected to standards such as ISO 8846

Thanks. I was under the impression that NH fuses were designed for static industrial applications.

 

[PaulRainbow]

Thanks. I was under the impression that NH fuses were designed for static industrial applications.

Just double checked, only some are ignition protected.

 

[Dockhead]

NH fuses are better and cheaper than Class T. Besides that, they can be used like knife switches as a circuit isolator. Downside is that they are bulkier.

Despite all that, I bought a bunch of Class T fuses and holders for my new lithium power system, and added one to my main engine/genset starting system too. I regretted the cost, but since my boat was originally built with a bunch of Class T fuses, I decided I didn't want to mix the types.

Also the smaller size of Class T in its holder was an advantage to getting two of them into my battery box.

 

[Baggywrinkle]

I've had NH fuses in both Bavarias as factory original equipment. They are bulky, easy to obtain, and cheaper than T-Class. T-Class are part of US standards, NH, EU.

Both work and I've got both in my boat.

 

[geem]

Very secure. They have been used in production boats for decades.

They are ignition protected to standards such as ISO 8846

My boat had them fitted to the windlass, domestic bank and engine in 1980. It influenced why I chose them for my lithium instead of class T