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klik.system | Specification guide to prefabricated wiring systems

17

RCD protected circuits & protective

conductor current

The operating range of RCDs is normally from 0,5

I

Δn

to 1

I

Δn

.

An *international technical report for the correct use of RCDs

recommends that, to avoid unwanted tripping, the

protective conductor current in a circuit should not exceed

0.3

I

Δn

of the RCD at the rated frequency. For example, this

would be a limit of 9 mA protective conductor current for a

30 mA RCD (0.3 x 30 mA = 9 mA).

When RCD protection is employed, the prefabricated wiring

system may require appropriate subdivision into several

circuits, so as to avoid unwanted tripping.

*PD IEC/TR 62350 Guidance for the correct use of residual

current operated protective devices (RCDs) for household

and similar use.