26 mm 2 (10 AWG) ground wire must be used, and in all other markets a 6 mm 2 must be used. control work practices involving temporary wiring. A safe, eficient temporary wiring system protects the client, the employer and the em-ployee by minimizing ser ous injuries, fires, pow-er failures and downtime. The recommended procedures in this data sheet are intended to eliminate the unsafe. The primary function of the substation grounding system is to increase safety, both to persons and property. Grounding of the units: Attach a ground wire from one of the threaded studs (A) at the bottom of the housing, to the mounting plate (B). Attach a second grounding wire from the mounting. Today, we're diving deep into the world of distribution box grounding, breaking down the standards, and shining a light on those sneaky mistakes that even experienced electricians sometimes make. Whether you're a seasoned pro or just starting out, this comprehensive guide will give you practical. Effective temporary grounding techniques must utilize a combination of grounding and bonding; grounding to clear accidental re-energization and minimize potential; bonding to ensure workers are not subjected to hazard-ous potential differences during energized situations. The effective application. The National Electrical Code (NEC) provides clear guidelines for ground wire sizing through Table 250. 122, but understanding how to apply these requirements correctly can make the difference between a safe installation and a costly code violation.