Upon pushing the switch of my nap250DR the Mains fuse om the Wall socket blows 50% of the time. Doesn’t this power amplifier have a soft start?
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I changed it to type C many moons ago. Now with current system I have no problems turning on and off when necessary. I try to keep system powered up all the time unless I go away or potential lightning strike.
Changing system components or placement on Fraim shelves again I power down.
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It is only the New Classic Range that has a soft start so you will need to get a Type C circuit breaker as @Dan_M suggests. In the meantime, leave it powered up, which will improve the sound.
When you say the “fuse in the wall socket” do you mean the fuse in the plug that’s in the wall socket? If that keeps blowing it likely indicates a fault against which the fuse is providing protection. Possibility in the cable, or maybe the amp, but it’s possibly a safety issue sp you should get it checked out.
If it’s the breaker in the consumer unit that’s tripping as people have referred to above, that’s different to a fuse, and a type C breaker would be a good solution if you currently have a type B that is tripping.
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Are you in the UK?
No, Netherlands. To make it more clear i mean the fuse that’s in my central circuit unit that collecties all circuits of my house. I guess I would need to install a “heavier” fuse. Out of principle I’m a bit reluctant to do so, but putting it back every time it trips is also a nuisance… My previous ML which needed to go due to the WAF had no such issues and had a huuge power supply
You need to talk to an electrician familiar with rules and regulations in your country. What applies to the UK doesn’t necessarily apply elsewhere.
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For safety purposes the fuse needs to be correct for the circuit it protects. You cannot just stick a heavier one in.
Is it actually a fuse? Most domestic circuits have circuit breakers unless they are very old. It’s these breakers that can be swapped for Type C if you have the more common Type B that’s tripping. This normally prevents niusance tripping far more effectively than using a higher Amp rated breaker.
I live in a rental apartment and have this challenge. What I have found is that I need to switch everything on in the correct order. I do my 250 first and leave a 10 second gap.
And don’t power it off when it is on 
I am in Germany and I leave my 250 DR on all the time I am at home but travel regularly so unplug it all when I am not there. When I reconnect and don’t leave switching on the 250 DR at least 10 seconds after everything else it blows the circuit quick blow fuse in the cellar. I usually leave at least a minute before turning it on and it never blows the fuse now.
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I live in the Netherlands as well and had the same problem when switching my 250 DR on. The problem was solved by installing this fuse holder from Siemens that is designed for use in your HiFi circuit.
Naim state to do source first, then power supplies and then lastly, power amps.
DG…
That looks like a solution indeed. Many thanks! I use the nac 272 as streamer and need to wait for the internet connection to be restored as the router is also on the same circuit. So resetting the breaker is not a viable option. I’m going to try your solution.
Or, if they make “slow blow” fuses for that fuse box, you could try that (might be cheaper).
As others have said, though, don’t just increase the fuse rating (even temporarily)