Ground resistance

Protection against the spreading of fire

Resistance to ground R2-Procedure B-DIN EN 1081 measurement of the resistance to ground R2on the installed floor covering.
The electricity resistance of an installed floor covering is measured between an electrode on the surface and the ground. The tripod-type electrode is set on the dry floor covering (48 hrs after installation) and connected to the resistance measuring instrument. The connection to the ground is also linked to the resistance measuring instrument. Before the voltage is switched on, the tripod-type electrode has to be loaded with at least 300 N (test person).

With values of 1010 Ω, the charging of individuals can decay in approximately one second. Below 108 Ω, a covering is sufficiently conductive to prevent any risks of ignition with inflammable dusts or gases by electrostatic charges when being walked on. Below 106 Ω, a covering is suited even for storage and production rooms of explosives. The respective requirements by the trade associations (e.g. ZH 1-200), electronics manufacturers, and users must all be complied with.