low voltage relay is a electrically operated switch. it will allow one ckt. to switch to another ckt. seperately. you can read about relays in basic electronics or basic electricity books.
Colleen
As he should be doing as he's suppose to be studying to get his electricians license.
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Colleen
1967
why must overcurrent protection be provided?" and I think you can see they are study questions. If he simply liked the matter, he would be googling on his own just to read about it.