Naim NAP 300 fuses

A few things -

Push the on/off switch firmly when turning the amp on. Don't slowly push the switch in.

Don't keep turning it on and off. It's best left on.

Are you using the correct replacement fuses ?

If it still is regularly blowing fuses (and these are the correct one) then get it check by your dealer. 

Richard Dane also pointed out to me that if the IEC plug is not completely pushed into the socket it can blow the fuse. You need to use the special fuses Naim supply. They sent me some via my dealer.

Phil

Only ever use the exact same type, make, and rating of fuse.  

As Phil mentions above, make sure the IEC connector is all the way in at the back - easy to get wrong, particularly if using a Powerline.

If it continues with the exact correct fuses then contact your dealer as it may indicate a problem with the amp.

Amp fuses or the fuses of the house? If latter, ask an electrician to change with the same type, but slower. I don‘t know the right word in english, in Germany it is „träge“. I had this issue. Christoph 

Hello and thanks for all your replies.

Yes, it is my 300 power amp fuse that blow not my house fuse.

Yes, I will start to switch power on quickly (as I have been pushing the button perhaps too slowly - I guess thinking that the current could be somehow controlled by a slow push!).

Yes, I will check that my power lead is pushed in firmly.

One last question. Do fuses need to be inserted the "right way around"?

Thanks

Fuse direction - take a look here

https://forums.naimaudio.com/topic/equipment-fuses

Brilliant. Thanks very much James.

Hi,

On the NAP300 the glass fuses are 3.15A 250v slow blow (T3.15AL250V) for 230v territories or 6.3A 250v slow blow (T6.3AL250V) for 115v territories and the ones we use are supplied by "LittleFuse" - worth checking that you do have the correct fuses in there.

Re: Christop's reply - in the UK breakers are specified by "Type" and the type determins the inrush current that the breaker will handle before it 'breaks'.

https://www.voltimum.co.uk/art...ght-mcb-its-easy-bcd - may be handy as a reference...

Cheers

Phil

Hello

One more subsequent question.

Why do I read that so many people prefer to leave their gear switched on?

I get the point about sound quality (ie avoiding warm-up time) and I now get the point about fuses blowing if you keep switching on and off....but surely the equipment will wear out faster (or will it?) and you run the risk of unattended fire/overheating issues.

I would welcome views on this.

Thank you

BigL posted:

Hello

One more subsequent question.

Why do I read that so many people prefer to leave their gear switched on?

I get the point about sound quality (ie avoiding warm-up time) and I now get the point about fuses blowing if you keep switching on and off....but surely the equipment will wear out faster (or will it?) and you run the risk of unattended fire/overheating issues.

I would welcome views on this.

Thank you

Bigl, try keeping your system on, and listen to the way the sound develops. Once your system is well run in, which is a long process (months even a year) in which the SQ gets better then less better and better, usually on an upward trend, you will have your answer when you turn it off for a day. It may take days to come back to where it was.

Phil