Alpha Technologies UPE-M Series - Manual (Page 15)

15 031-145-C0-002 Rev. B
Enclosure
Footprint
2'
(m
in
.)
#2 AWG
#6 AWG
Connection made with Burndy connector
(P/N YGHR58C2W-3 or equivalent)
Connection made with Burndy connector
(P/N YGHP58C2W-2TN or equivalent)
Two 8' ground rods 6' apart (min.)
Note: May require additional ground rods
to meet NEC minimum grounding
standard (25 ohms or less).
Terminate at enclosure ground
Terminate at service
entrance ground
2.0 Site Preparation, continued
2.4 Enclosure Grounding
Alpha Technologies recommends using the grounding method illustrated below. The grounding
method for a particular site is depends on soil type, available space, local codes, National Electric
Code (NEC) requirements, and other site-specific characteristics.
Alpha Technologies recommends a minimum of five ohms ground resistance between the enclosure
and ground rods, but resistance shall not exceed 25 ohms, in accordance with IEEE 1100-1999
(Powering and Grounding Electronic Equipment).
Alpha Technologies assumes no responsibility or liability for failure of the installer to comply with
the requirements of all applicable local and national codes. Where allowed, exothermic welding
may be used as an alternative to Burndy clamps and connectors.
Service Grounding (required)
#6 bare copper wire from Service Neutral / Ground Bar with 2 ground rods located 6' apart.
Lightning Protection (optional)
1/2" x 8' copper ground rod, four places, driven about two feet (typical) from the corners of the
pad.
#6 bare copper wire loop terminated to each ground rod and buried 30 inches (min.) below grade.
Corrosion-proof connections (25-year life span) and hardware suitable for direct burial must be
used.
#6 bare copper wire from loop to the enclosure.
Fig. 2-3, Enclosure Grounding
1
2
4
3
1
2
3
4