Weighbridge installations will typically need earthing from the weighbridge structure to ground. Copper earth spikes ensure that any wayward current is delivered straight into the ground rather than have it pass through your delicate weighing instrument.
Your weighbridge indicator, load cells as well as any computers, printers and other electrical paraphenalia you might have need to be protected from the power supply. East Rand Scales makes use of a 1KVA online UPS with built in sine tamer. This ensures your power does not fluctuate and also keeps your system on when the power fails.
Additional protection is offered through the use of surge suppressors on your load cell wiring. This ensures no overvoltage can make it's way from the weighbridge to your indicator.