Alpha Technologies PN-4 - Manual (Page 13)

13 031-103-B0-004, Rev. D
E nc los ure F ootprint
20 feet (minimum)
2
fe
et
(m
in)
30
in
ches
Side View
UFER Ground
SE
conduit &
wires
GEC
#2 bare
copper
wire No
separation
is required
#2 AWG
#2 AWG
Opening
for
Sweeps
Opening
for
Sweeps
Opening
for
Sweeps
Connection Made With
Burndy Connector
P/N YGHP58C2W-2TN
Or Equivalent
Connection Made With
Burndy Connector
P/N YGHR58C2W-3
Or Equivalent
Lightning Protection (Optional)
1 1/2" x 8' copper ground rod, four places, driven about 2 feet (typical) from the corners of the pad.
2 #2 bare copper wire loop terminated to each ground rod and buried below grade 2 to 12 inches.
Corrosion-proof connections (25+ year life-span) and hardware suitable for direct burial MUST be
used.
3 #2 bare copper wire from loop to the enclosure.
4
When the electrical supply is a primary service (not a secondary or feeder service) a #2 bare copper
wire must be bonded to the lightning protection loop to the Grounding Electrode Conductor where
they are closest.
Service Grounding (required)
5 #2 bare copper wire from Service Neutral/Ground Bar down 30" and out 20' beyond the pad edge.
This is often called a UFER ground (Ground Ring in the NEC).
1
2
3
4
5
Fig. 3-4, Alternate Grounding, PN-3 and PN-4
3.0 Site Preparation, continued
3.2 Enclosure Grounding, continued