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why 4 to 20 ma ,why not 0 to 20 or 3 to 15 or anything
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Answer Posted / aravindan k
beyond 25 mA in live due any damage it cause spark, so the
they maintain below 25 mA it doesnt cause spark even
puncture or damage the live cable......
this is reason for maintain 4-20 mA. so we can use signal
at any environment
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