Installation Guide

Working with Interior Connections
1. Connect all grounding and bonding conductors that are connected above grade or interior to
a building using two-hole multiple crimp type (with UL tool and circumferential die
compression) connections or by exothermic weld connections where allowed.
2. Size AC service electrical ground per the NEC with No. 2 AWG BTCW minimum.
3. Run service ground wire continuously and in an unbroken manner.
4. Coat all touching surfaces before connecting.
5. Install anti-oxidant compound per manufacturer’s instructions.
6. Make all grounding connections, interior and exterior, with two-hole lugs using an anti-
oxidation compound prior to crimping.
Grounding Rooftop Network Devices
A rooftop network device refers to a site where Itron’s site is built on an existing building,
regardless of whether Itron’s TCU / CCU equipment is located on the rooftop or inside the
building. Human occupancy of buildings requires that safety is a primary consideration. Network
device grounding must be designed to ensure that any potential electric discharge is safely
carried to earth and not dissipated through the structure.
Grounding Rooftop Network Devices
1. Install the MGB at a rooftop site at the Itron TCU / CCU equipment location. This acts as the
primary point where all Itron grounding connects to the main grounding system.
CCU100 and Repeater100 Installation Guide F Grounding Specifications
12 February 2021 815-0491-00 Itron, Inc. Page 120 of 133