In building an amp, which leg should be fused on the incoming AC lines? Line or neutral? This is for USA, 110Vac.
Is the answer any different depending on what topology amp I'm building? Does a typical SS bipolar amp fuse the same as a chip amp and the same as a tube amp? What consideration should be part of the analysis?
I think I've seen it both ways and always wondered if there was a preference related to AC theory.
TIA,
Tommytube
Is the answer any different depending on what topology amp I'm building? Does a typical SS bipolar amp fuse the same as a chip amp and the same as a tube amp? What consideration should be part of the analysis?
I think I've seen it both ways and always wondered if there was a preference related to AC theory.
TIA,
Tommytube
UL60950 listing/approval requires the fuse in the active/phase line. They used to only accept a wired fuse but will now accept a MCB as well.
As you are in the US it seems good practice to follow this recommended practice.
As you are in the US it seems good practice to follow this recommended practice.
Hi
Round hole is earth GND, large slit is neutral (white), small slit is hot (black), line, live, ect. Fuse the hot as everyone has stated. Properly grounding the case to earth is important too. There's no guarantee that every home outlet is wired properly.
Therefore, "Safety first" when it comes to line voltage is a good tune, IMHO.🙂 You are using an isolation transformer, so obviously there should be a fuse on the primary winding. If you are not using isolation, then you are committing a grave error and we do not discuss non-isolated circuits for audio here.
Round hole is earth GND, large slit is neutral (white), small slit is hot (black), line, live, ect. Fuse the hot as everyone has stated. Properly grounding the case to earth is important too. There's no guarantee that every home outlet is wired properly.
Therefore, "Safety first" when it comes to line voltage is a good tune, IMHO.🙂 You are using an isolation transformer, so obviously there should be a fuse on the primary winding. If you are not using isolation, then you are committing a grave error and we do not discuss non-isolated circuits for audio here.
Only in a country where you keep this things in mind. In many parts in Europe you don't distinguish line and neutral. You can turn the plug 180 degrees.Leolabs said:
how do you figure?
L (receptacle) ----- hot amp
N (receptacle) ----- n amp
turn 180
N (receptacle) ----- hot amp
L(receptacle) ------- n - amp
am I missing something in your answer?
Anyway, the question was asked by a citizen of the US, and we (North Americans) have polarized plugs for the reason to clearly identify N and L contacts.
Neutral is silver coloured, hot golden, ground screw green.
Wire your plug wrong (in a new house construction) - and the electrical inspectors comes down on you like a sledgehammer.
surely you meant socket outlet?audio-kraut said:
Plug (top) is the bit on the end of the cable attached to the portable appliance.
Thanks for confirmation
It would seem that LINE is the correct answer.
I appreciate the clarification and will proceed accordingly.
It would seem that LINE is the correct answer.
I appreciate the clarification and will proceed accordingly.
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