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MILHDBK419A
2.6.2.4 Vertical Rods Connected by a Grid. The resistance of a bed of vertical rods, interconnected with a
wire grid is (210)
(229)
where
= resistance of wire grid as given by Equation 227
= length of conductors in grid
= resistance of bed of rods, as found from Figure 212
= mutual resistance which accounts for interaction
of rods on grid
(230)
, or
(231)
where
= radius of grid wire,
= depth of grid, if buried, and
= length of rod, if the grid is near surface.
230


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