1 lists the specific size for each current, from a minimum of 15 amps, providing a wire no smaller than 14 AWG (for copper) and 12 AWG (for aluminum). Since there is no current rating smaller than this, these are the smallest acceptable wire sizes for grounding . Where continuity of service is a high priority, high-resistance grounding can add the safety of a grounded system while minimizing the risk of service interruptions due to grounds. They are considered to be the same with respect to safety of people against indirect contacts. Knowledge of the various types of system grounding and performance characteristics is critical when designing or operating an electrical system. The voltage, system arrangement, loads connected, and continuity of. This Grounding Standard describes the technical requirements for grounding the SEC Distribution Network installations. SEC Distribution System extends from the MV (33 kV, 13. 8 kV) feeder outlets of HV / MV Substations down to SEC Customer interface including KWH-Meters and meter boxes. To provide. This manual is applicable for low voltage AC and DC drive systems. Whether you're a seasoned pro or just starting out, this comprehensive guide will give you practical.