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031-295-B0-001, Rev. B (11/2018)
Grounding and Earth Connection Notes
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2' min.
Connection made with Burndy
connector (P/N YG HR58 C2W-3
or equivalent)
Terminate at enclosure or
external Burndy ground
Terminate at service
entrance ground
#6AWG
Two 8' (2.4m) ground rods, 6' (1.8m)
apart, min.
(may require additional ground rods to meet NEC
minimum grounding standard of 25 ohms or less)
Connection made with Burndy connector
(P/N YGHP58C2W-2TN or equivalent)
#2AWG
Service Grounding (required)
• #6 bare copper wire from Service Neutral / Ground Bar with 2 ground rods located 6’ (1.8m) apart. If system
ground resistance is greater than 25 ohms consult with local code authority for a suitable grounding system.
Lightning Protection (optional)
• 1/2” x 8’ (13mm x 2.4m) copper ground rod, four places, driven about 2’ (0.6m) (typical) from the corners of the
pad.
• #6 bare copper wire loop terminated to each ground rod and buried below grade 30” (.762m) (min). 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.
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• Alpha Technologies recommends using the grounding method illustrated below. The grounding method for a
particular site will be dependant upon soil type, available space, local codes, NESC (National Electric Safety
Code), NEC (National Electric Code), and other site-specific characteristics.
• Alpha recommends less than 25 ohm ground resistance in the grounding system in accordance with NESC
Section 9 and NEC Article 250, 820 Part IV.
• Alpha recommends that if there are other electrical services in the area of any part of the enclosure or
grounding system shown below that you contact your local code authority on possible 20’ (6.0m) bonding
conductor requirements for connecting the different grounding systems.
• Alpha Technologies assumes no responsibility or liability for failure of the installer to comply with the
requirements of applicable local and national codes. Where allowed, exothermic welding may be used as an
alternative to Burndy clamps and connectors.
NOTICE
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Enclosure Footprint
