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Grounding
BURNDY
®
BURNDYWeld
®
Exothermic
Canada: 1-800-387-6487
www.burndy.com
US: 1-800-346-4175
Blue highlighted items are industry standard and most frequently ordered.
E-88
BURNDY
®
GROUNDMAX™
Application Information
Vertical Installation
Drill or bore a hole the desired diameter and
depth. Suspend ground electrode in center
of hole to be filled. Pour BURNDY
®
GROUNDMAX™ until desired level is
obtained. No tamping is required.
Dry Volume of
Ground Resistance
BURNDY
®
GROUNDMAX™
Comparison of
vs. Hole Size
Bare Rod vs.
Lbs. of
Hole Size with
Percent Resistance
Hole BURNDY
®
GROUNDMAX™ 5/8 x 10 Rod in
Compared to Rod
Size
Per Ft.
Center of 15 Hole
Only (100%)
4
6.5
4
52%
6
14.5
6
47%
8
25.8
8
44%
10
40.4
10
42%
12
58.1
12
40%
Steady State Leakage Resistance‡ Using 4/0 Copper Wire vs. BURNDY
®
GROUNDMAX™
Percentage of Resistance with .475
Wire Plus BURNDY
®
GROUNDMAX™ in
Various Diameters Compared
.475 Diameter
to Wire Only (100%)
Length
Wire Only
2
3
4
6
25
100%
83%
78%
74%
69%
50
100%
85%
81%
77%
73%
75
100%
86%
82%
79%
75%
100
100%
87%
83%
80%
77%
150
100%
88%
84%
82%
78%
200
100%
88%
85%
83%
79%
250
100%
89%
85%
83%
80%
300
100%
89%
86%
84%
80%
Horizontal or Grid
Construction†
Pour into horizontal trench until level of
ground wire is reached. Place ground wire.
Pour in additional BURNDY
®
GROUND-
MAX™ until wire is covered to desired
height. Cover with fill. No tamping required.
For grid construction, pour BURNDY
®
GROUNDMAX™ and spread over ground
grid until desired thickness is achieved.
Cover with fill.
† Entire grounding system should be surrounded
by BURNDY
®
GROUNDMAX™. Conductors
should be insulated as they exit BURNDY
®
GROUNDMAX™ column.
‡ The use of BURNDY
®
GROUNDMAX™ around
the grounding system will also reduce surge
impedance by increasing the effective contact
area of the electrode to soil.
Horizontal Construction
BURNDY
®
GROUNDMAX™
Copper Wire
Earth or Fill
Earth or Fill
BURNDY
®
GROUNDMAX™
Copper Wire
Grid Construction
For mold types or BURNDYWeld
®
items not shown, please contact factory.