How many square inches in a square foot?
12 x 12 = 144 sq inches
4.5 amps per sq foot = 4500 milliamps (ma) per sq foot
to find out how many ma needed to do 1 sq inch 4500/144 = 31.25ma
(So call it 30ma per sq inch)
I take it you can calculate out how much is required to do 10 sq " now ?
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