The difference among supply source, the Mains and SUPPLY APPARATUS

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soochu

#53526 Thu, 04 Nov 04 04:38 AM

The apparatus are fed from a supply source other than the MAINS or from a SUPPLY APPARATUS, and which contain a LASER SYSTEM or produce an internal OPERATING VOLTAGE greater than 4000 V (peak), this standard applies as far as applicable.

The above words is from Standard UL6500 of US.. I can't catch the differences among " a supply source", " the MAINS" and " a SUPPLY APPRATUS".
I know the MAINS is fed from Electric Power Department of US.. It's the 110V in US.
BTW, can I use the word "catch" instead of "understand"? Smile [:)]

soochu

Joined on Tue, Feb 3 2004

China

New Member (50)

Mister Micawber

#53539 Thu, 04 Nov 04 05:27 AM

I'm not an electrician or engineer, Soochu, but 'supply source' is the general term, and 'the mains' (as you said) is from the infrastructure, while a 'supply apparatus' would likely be something like a private generator or a windmill or a battery.

Yes, you can say 'catch' instead of 'understand', but 'catching' is a more shallow process than 'understanding', so should be saved for brief bits of information input.

Mister Micawber

Joined on Wed, Aug 4 2004

Yokohama

Veteran Member (22,612)

'The question is,' said Humpty Dumpty, 'which is to be master-- that's all.'