5 Jan 91
Horizontal Anodes. (Underground Applications)
There are times when it is advantageous to install anode
horizontally as shown in figure 2-24. For further information,
see paragraphs 10.91 through 10.93 of TM 5-811-7 (reference
10). This configuration is particularly helpful when using
packaged ceramic anodes (figure 2-24) since earth backfill can
be solidly tamped around them. The anodes can be laid on the
bottom of a trench or excavation with compacted backfill. This
often achieves better compaction than when tamping in vertical
The design is undertaken in the same manner as
described in Section 2-2 and 2-3. The single anode-to-earth
Anode-to-electrolyte resistance in ohms.
Length of anode in ft.
Diameter of anode in ft.
Depth of anode in ft.
of a single anode-to-earth.
For multiple anode installations, equation 1-11 may be used to
approximate total resistance: