BURNDY®
Grounding
BURNDYWeld® Exothermic
BURNDY®
GROUNDMAX™
BURNDY® GROUNDMAX™ is an economical solution for areas with very difficult
grounding issues. BURNDY® GROUNDMAX™ is highly conductive in a wet or dry
application and does not require moisture to
lower the resistance of your grounding system. BURNDY® GROUNDMAX™ contains a
corrosion inhibitor which forms a film on copper, creating a barrier against corrosion.
BURNDY® GROUNDMAX™ can be poured
in dry or pumped in slurry form. No tamping
required. It is very contractor friendly. No
special tools required.
4
Thickness of
BURNDY® GROUNDMAX™
(Inches)
2
3
4
5
6
7
8
9
10
4.1
6.2
8.2
10.3
12.3
14.4
16.4
18.5
20.6
BURNDY® GROUNDMAX™
Advantages:
• Easy to install.
• Electrically conductive.
• Environmentally friendly.
• Will not leach into the ground.
• Positive low resistance, electrical connection to earth.
• Does not contain any hazardous chemicals.
• Compatible with all copper grounding
systems.
• Contains a corrosion inhibitor to protect
copper.
• Will not expand or shrink.
• Not affected by freezing.
• Excellent shelf life.
• Typical resistivity <10 Ohm-cm
Material Required Per Linear Foot of Trench
Width of Trench (Inches)
6
8
10
12
14
6.2
9.3
12.3
15.4
18.5
21.6
24.7
27.8
30.8
8.1
12.1
16.2
20.2
24.2
28.3
32.3
36.4
40.4
10.1
15.2
20.2
25.3
30.3
35.4
40.4
45.5
50.5
12.1
18.2
24.2
30.3
36.4
42.4
48.5
54.6
60.6
14.1
21.2
28.3
35.4
42.4
49.5
56.0
63.7
70.7
E-87
16
18
20
22
24
16.2
24.2
32.3
40.4
48.5
56.6
64.7
72.7
80.8
18.2
27.3
36.4
45.5
54.6
63.7
72.7
81.8
90.9
20.2
30.3
40.4
50.5
60.6
70.7
80.8
90.9
101.0
22.2
33.3
44.5
55.6
66.7
77.8
88.9
100.0
111.1
24.2
36.4
48.5
60.6
72.7
84.9
97.0
109.1
121.2
To calculate the lbs. of material required to fill a trench:
• Determine desired thickness.
• Move to the right until you are under the known width of the trench. This number will be the
weight of the material in lbs./linear ft.
• Take this number and multiply by the length of the trench in feet. Your answer will be the
amount of BURNDY® GROUNDMAX™ material required to fill the trench to the desired level
in lbs.
Example:
Thickness:
Width
=
=
Answer
=
=
6 inches
18 inches
54.6 lbs. per linear ft. (from the table above)
54.6 lbs. per linear ft. x 25 ft. trench = 1,365 lbs. of BURNDY®
GROUNDMAX™
28 (50 lb.) bags of BURNDY® GROUNDMAX™
For mold types or BURNDYWeld® items not shown, please contact factory.
Blue highlighted items are industry standard and most frequently ordered.
US: 1-800-346-4175
www.burndy.com
Canada: 1-800-387-6487
BURNDY®
Grounding
BURNDYWeld® Exothermic
BURNDY®
GROUNDMAX™
Application Information
E-88
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
BURNDY® GROUNDMAX™
vs. Hole Size
Lbs. of
Hole
BURNDY® GROUNDMAX™
Size
Per Ft.
4⬙
6⬙
8⬙
10⬙
12⬙
Horizontal or Grid
Construction†
Pour into horizontal trench until level of
ground wire is reached. Place ground wire.
Pour in additional BURNDY® GROUNDMAX™ 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.
Horizontal Construction
Ground Resistance
Comparison of
Bare Rod vs.
Hole Size with
Percent Resistance
5/8⬙ x 10⬘ Rod in
Compared to Rod
Center of 15⬘ Hole
Only (100%)
6.5
14.5
25.8
40.4
58.1
4⬙
6⬙
8⬙
10⬙
12⬙
52%
47%
44%
42%
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
25⬘
50⬘
75⬘
100⬘
150⬘
200⬘
250⬘
300⬘
Wire Only
100%
100%
100%
100%
100%
100%
100%
100%
2⬙
83%
85%
86%
87%
88%
88%
89%
89%
† Entire grounding system should be surrounded
by BURNDY® GROUNDMAX™. Conductors
should be insulated as they exit BURNDY®
GROUNDMAX™ column.
3⬙
78%
81%
82%
83%
84%
85%
85%
86%
4⬙
74%
77%
79%
80%
82%
83%
83%
84%
6⬙
69%
73%
75%
77%
78%
79%
80%
80%
‡ 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.
BURNDY® GROUNDMAX™
Copper Wire
Earth or Fill
Earth or Fill
Grid Construction
BURNDY®
GROUNDMAX™
Copper Wire
For mold types or BURNDYWeld® items not shown, please contact factory.
Blue highlighted items are industry standard and most frequently ordered.
Canada: 1-800-387-6487
www.burndy.com
US: 1-800-346-4175