Neutral Earthing Solution
Introduction
The only solution that we here come across is referred to and known as solidly neutral.
This being the common go-to solution for low voltage applications at 600 volts or less.
Explanation
In nearly all cases back at the star point of the transformer, the neutral is grounded and grounding conductor must be extended from the source to the furthest point of the system within the same raceway or conduit. The purpose of this is to maintain very low impedance to ground faults so that a relatively high fault current will flow thus ensuring that circuit breakers or fuses will clear the fault quickly and therefore minimise damage.
That is pretty simple, only other aspects to as keep at the back of your mind is you should only have a single neutral earthing link across an individual supply. Each individual supply should have a neutral earth. If in any case, a system is running two supplies in parallel and without a 4P breaker breaking
the two supplies only one should be present.
Finally if you have, in particular, old UPS equipment or equipment that when the power is off and the mains incomer is 4P and the breaker is open and therefore the neutral earth link is broken. What impact will this have on your system? The reason I ask is old UPS systems or some UPS's won't have a connection to earth and this can cause problems as they have no reference to ground.