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Calculations
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Earthing Calculation

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SOIL SPECIFIC RESISTANCE
Number of Measurements 1 2 3 4
a( m ) ( drill rod spacing )
r( ohm ) ( resistance measured by device )
r = 2*p*r*a ( ohm - m )( results)
k ( seasonal coefficient )
BURIED GROUNDING
d ( Embedded Conductor Diameter or Strip Width ) m
H (Buried Conductor Depth) m r (ohm-m)
H (Buried Conductor Depth) m Rt (ohm)
ROD GROUNDING
L ( Rod Length ) m
d ( Rod Diameter ) cm r (ohm-m)
n ad Rt (ohm)
EYE GROUNDING
a ( Width ) m
b ( Height ) m r (ohm-m)
L ( Total Conductor Length ) m Rt (ohm)
CORNER GROUNDING
S (Earth Area Perimeter) m r (ohm-m)
L ( Conductor Length Buried In The Ground m Rt (ohm)
COMBINED GROUNDING
EMBEDDED + BAR Requivalent (ohm) m EMBEDDED + EYE Requivalent (ohm) m
EYE + ROD Requivalent (ohm) m EMBEDDED +CORNER Requivalent (ohm) m
SQUARE + ROD Requivalent (ohm) m ANGLE + EYE Requivalent (ohm) m
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