size of nutral wire

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There may be some situation where a grounded conductor must be larger than the conductor sizes however they are usually the same size or even smaller. You may be dealing with non linear loads where harmonics may be present. What type of loads are they?
 
How can I put this in the nicest possible way?

What the heck are you talking about? :smile: Just kidding.

But seriously though... what the heck are you talkng about?
 
Crest factor is the ratio of the peak current to the RMS current. On a linear load (eg a lamp), the crest factor is 1.414. As the crest factor goes up, the peak current is getting bigger than the RMS current. This means that the current waveform is not a sine wave, so harmonics are in play. So this is the sort of situation where uprated neutrals would be found.

The OP has given conductor sizes in sq mm, so I suspect he isn't in the USA...
 
dbuckley said:
Crest factor is the ratio of the peak current to the RMS current. On a linear load (eg a lamp), the crest factor is 1.414. As the crest factor goes up, the peak current is getting bigger than the RMS current. This means that the current waveform is not a sine wave, so harmonics are in play. So this is the sort of situation where uprated neutrals would be found.

The OP has given conductor sizes in sq mm, so I suspect he isn't in the USA...
Click to expand...

I understand that, but what the heck is he talking about :smile:
 
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