Attach a ground wire from one of the threaded studs (A) at the bottom of the housing, to the mounting plate (B). 1 Pre-installation Requirements for Transformers and Substations: - The indoor ceiling and wall finishes should be completed with no water leakage. - The foundation should be inspected and accepted as qualified, and the conduits embedded in the. Power from factory ground must be installed by a qualified electrician. Each DISTRIBUTION BOX and controller must be grounded. 26 mm 2 (10 AWG) ground wire must be used, and in all other markets a 6 mm 2 must be used. Grounding of the units: Attach a ground wire from one of. Whether you're a seasoned pro or just starting out, this comprehensive guide will give you practical insights into proper grounding techniques, with a special focus on how selecting quality materials from a reliable building material supplier impacts your entire system's safety and longevity. This publication gives you general guidelines for installing an Allen-Bradley industrial automation system that may include programmable controllers, industrial computers, operator-interface terminals, display devices, and communication networks. Reduce electrical hazards to staff and public to as low as reasonably practicable during the transfer of earth fault energy and under load imbalance. 1. 1 This Engineering Recommendation forms part of Annex 1 to the Electricity Distribution Code and titled Engineering Recommendation No.