RTU AND TOWER
GROUNDING PROCEDURE
October 2, 2007
N OT ICE
D ata F low Sy stems , Inc . as sume s no res p ons ibility for any err or s t hat may appe ar in this
d ocume nt, nor d oe s it ma ke a ny c omm itme nt t o u pda te t he inf orm at ion c onta i ned
here in. Howe ver, que st ions r egard ing t he inf orma tio n c o nta in ed in t h is do cume nt are
w e lco m e d .
D ata Flow Sy stems a lso re ser ves t he r ig ht t o ma ke c h anges to the RTU grou nd ing
p r oc e d u r e a n d t o t he inf or m a t i on c o n t a i ned i n t h is d oc umen t at any t ime w it h out n o ti ce.
©Data Flow Systems, Inc.
6 0 5 N . J o h n R od e s B lvd. , Me l bo u r ne , F L 3 2 93 4
P h o ne 3 21 - 25 9 - 5 0 09 • F a x 32 1 - 25 9 -4 0 0 6
Wear high voltage gloves (1000 VAC protection) when performing this
procedure
Note: Underground locates must have been completed prior to proceeding.
Grounding for the tower and DFS equipment is provided by a #6 solid bare-copper wire
having a continuous connection (no splices) between a 10' X 5/8” tower ground rod , the
tower, the local power utility grounding rod, and the polyphaser-mounted ground lug.
1. At a position adjacent to the concrete pad nearest to the back of the tower's rear leg,
drive the 5/8” X 10' ground rod in the ground until just below concrete pad.
2. Grounding: Determine if the site work has been completed.
• Temporary Ground (site work not complete) - Run a #6 bare copper wire
between the copper grounding rod and the tower base. Attach the wire to the
ground rod with a 5/8” tear drop ground lug. Use a 1-1/4” ground clamp with
copper screw to attach the temporary ground to the tower leg.
• Permanent Ground (site work complete) - Install a continuous run of #6 barecopper wire between the grounding rod, the tower, the local utility grounding rod,
and the DFS enclosure or polyphaser-mounted ground lug. Use a 1-1/4” ground
clamp with copper screw on the tower leg adjacent to the concrete. Grounding to
the ground rods should be done with a 5/8” tear drop ground lug.
Illustration – Ground wire connected to RTU Polyphaser
-1-
Illustration – Ground wire connected to Tower
-2-
©Data Flow Systems, Inc.
6 0 5 N . J o h n R od e s B lvd. , Me l bo u r ne , F L 3 2 93 4
P h o ne 3 21 - 25 9 - 5 0 09 • F a x 32 1 - 25 9 -4 0 0 6
w w w. d a t a f low s y s . c om