Ss 551 Code Of Practice For Earthing Review

From TN-S to TT systems, from 1-ohm earth electrodes to 30 mA RCDs, every clause in SS 551 serves a purpose: to bring fault currents safely to ground and keep people and property out of harm’s way.

The standard provides a calculation method (based on adiabatic equation) rather than arbitrary tables. The formula is: ss 551 code of practice for earthing